Should radiator fan turn on when ac is on

6. 68rs327 Discussion starter. 29 posts · Joined 2012. #1 · Aug 2, 2018. My 2007 Acadia started overheating temp was around 230 deg. I noticed the cooling fans only are running on Low speed and do not turn on high speed. I replaced the fans and still only low speed.

As mentioned, they should be fine because both fans turned when you turn on AC. You can try to remove the passenger side fan and look near the coolant inlet hose for the switch. When you disconnect the switch the fan should turn on. You may need to turn the key to ON, but engine can be off.If the fans remain on for the same time, consistently, then it could be the ECU/KECM remaining on and, as the coolant temp was high, the fans continue until the control modules shut down. Then, once they are in sleep mode, the fans do not run regardless of coolant temperature.The radiator fan also plays an important role when the air conditioning (AC) system is in use, as the AC puts additional strain on the engine and increases the need for cooling. Understanding how the radiator fan works and when it should turn on when the AC is on is essential for maintaining the proper functioning of a vehicle.The temp was 194 and steady. No cooling fans. Lower radiator hose cool to the touch. I revved the engine up to 2000 rpm for a couple on minutes. Temp rose to 200. Lower radiator hose finally hot, indicating that the thermostat opened. Still no fan running. I turned on the a/c with fan speed at 1. Both fans kicked on and cooled the coolant down ...It's one of two things. 1. Engine thermo fan temp sender is the wrong one for your model! 2. Cooling system thermostat is failing, blocked or damaged! If it's the engine water thermostat failing to open at the correct temp! It's opening and closing way too late causing the fans to cycle at that opening temp.

Fact 1: The Radiator Fan Should Turn On When The Ac Is On: The radiator fan plays a crucial role in maintaining the engine temperature, especially when the AC is on. When the AC is activated, it places an additional load on the engine, generating more heat that needs to be dissipated.Fact 1: The Radiator Fan Should Turn On When The Ac Is On: The radiator fan plays a crucial role in maintaining the engine temperature, especially when the AC is on. When the AC is activated, it places an additional load on the engine, generating more heat that needs to be dissipated.The temp was 194 and steady. No cooling fans. Lower radiator hose cool to the touch. I revved the engine up to 2000 rpm for a couple on minutes. Temp rose to 200. Lower radiator hose finally hot, indicating that the thermostat opened. Still no fan running. I turned on the a/c with fan speed at 1. Both fans kicked on and cooled the coolant down ...John's right. I rigged up a light to operate when the fan goes on. It went on when the AC went on. So, I rewired it off the high speed fan relay. Now it lights with the high speed fan, when coolant temperature tops 204F, or 186F with the AC. I'm not the lowest of the low, but I am the slowest of the slow (49.6 mpg over 38k miles in Scion xB)When you have radiation treatment for cancer, your body goes through changes. Follow your health care provider's instructions on how to care for yourself at home. Use the informati...7004 posts · Joined 2008. #3 · Mar 14, 2015. one fan turning on/off is perfectly normal. but it is a bit odd that it would go above 210 at all. if you turn on the a/c, that should automatically set the fans to the max fan speed. if the a/c is off, then it should depend on the temp of the coolant. next thing i would check is the thermostat if ...The fan won't turn on unless the AC is on. It does not turn on when the ECT sensor is jumped with a wire but I don't think it's due to bad fuses or relays. According to the circuit diagram "Cooling Fan Controls Circuit Diagram (K20Z)", I believe my relays and fuses are working because I measured 12V at the radiator fan motor.

The high speed cooling fan is commanded on when the coolant temperature reaches 113°C (235°F). It is turned off if the coolant temperature lowers to 108°C (226°F). When the A/C is on and the coolant temperature reaches 85°C (185°F), the low speed cooling fan will be turned on at vehicle speeds less than 56 kPh (35 mph).When your ac is on your low speed on the radiator fan should be running. Since it is not the high side pressures go extremely high. When the computer sees these extreme pressures it turns the high speed on to the radiator fan bringing the pressures down to normal. All this because the fan controller is not running the low speed anymore.Are you saying that with the cabin heater/AC fan turned Off, the radiator fans don't come on when the OBD-indicated temperature rises above 212 F? Whether or not there's a flow problem, the fans should be turned on by the ECM when the coolant temperature is high, without having to turn on the AC.Like. Sort by Oldest first. PhLoBuS. 2194 posts · Joined 2009. #2 · May 12, 2011. I have to manually switch my LFP fan on when I use the AC. 2004 SVT Lightning. ¼: 11.30 @ 119mph - 93 octane. 782 rwhp / 794 rwtq - E85.The high speed cooling fan is commanded on when the coolant temperature reaches 113°C (235°F). It is turned off if the coolant temperature lowers to 108°C (226°F). When the A/C is on and the coolant temperature reaches 85°C (185°F), the low speed cooling fan will be turned on at vehicle speeds less than 56 kPh (35 mph).Conclusion. No, the radiator fan does not always run. Depending on the vehicle, the fan may only turn on when the engine is hot or when the air conditioning is turned on. Some vehicles have an automatic setting that turns the fan on and off as needed, while others have a manual setting that allows the driver to choose when to …

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AC blows cold while moving, and gets warmer while I'm stopped. There are two fans behind the radiator. One is suppose to begin running when the AC is turned on. The other is to cool the radiator when it gets too warm. Raise the hood with the engine running and AC "on"and see if at least one fan is running. May 04, 2009 • 1995 Buick …Jan 31, 2024 · The radiator fan plays a pivotal role by drawing air through the radiator to dissipate heat. Typically, it should turn on as the engine reaches a certain temperature or when the AC is on to provide additional airflow. A fan operating solely during AC use raises potential concerns about the engine’s cooling strategy. AT WHAT TEMPERATURE RADIATOR FAN TURNS ON CHEVROLET CRUZE, CHEVY SONIC, HOLDEN CRUZEIn this video we will show you at what temperature the radiator fan / coo...First, you need to know that the problem is in the blower fan resistor. You would need to test and check it with the multimeter. You can skip this step and bypass the resistor by …

Trying to choose between a steam or hot water radiator? Here’s what you need to know to ensure you pick the best fit for your home. Expert Advice On Improving Your Home Videos Late...I have a 2012 Chevy Sonic with the 1.8l engine and the radiator cooling fan will not come on. I have checked the fuses, relays, replaced the fan completely with the resistor located in the fan shroud. If I pull the fan relay it will turn on the fan and it will not shut off until I turn off the vehicle. Also the AC does not turn on the fan either.All vehicle ac systems are sealed from the factory with service valves made available to hvac repair people and knowledgeable diyers. If ac fails to run, the ecm knows this and does not turn on cooling fans. A dead ac system doesn't need cooling fans. This does not affect when cooling fans are needed when coolant temps rise.Mar 2, 2017 · At least until around 2009, as was noted earlier, if the engine is overheating, then the radiator fans should run regardless of whether or not the AC compressor is connected, or is turned on. Conversely, when the engine is not overheating , the radiator fans are normally not turned on (to save fuel) except if the AC (or windshield defroster) is ... My 2013 Hyundai i10 has one fan and as far as I can see one coolant temp sensor. I replaced water pump and radiator and coolant temp sensor. When I turn on the ac the fan works and keeps the car cool. When the ac is of the radiator hoses both become same heat after a while and the overflow reservoir starts boiling over and the fan do not kick in.It's one of two things. 1. Engine thermo fan temp sender is the wrong one for your model! 2. Cooling system thermostat is failing, blocked or damaged! If it's the engine water thermostat failing to open at the correct temp! It's opening and closing way too late causing the fans to cycle at that opening temp.Updated March 6, 2024. Highlights. “On” means that your fan is running constantly, so when you get near a vent, you’ll always feel airflow. “Auto” means that your fan will only …The A/C is the smaller electric fan in front of it. That will come on when you switch on A/C together with the interior ventilation fan which ...Replacing an old AC unit or installing a new one can be a big — and pricey — job. Learn about AC installation costs with this comprehensive guide. Expert Advice On Improving Your H...Conclusion. No, the radiator fan does not always run. Depending on the vehicle, the fan may only turn on when the engine is hot or when the air conditioning is turned on. Some vehicles have an automatic setting that turns the fan on and off as needed, while others have a manual setting that allows the driver to choose when to …Mar 2, 2017 · At least until around 2009, as was noted earlier, if the engine is overheating, then the radiator fans should run regardless of whether or not the AC compressor is connected, or is turned on. Conversely, when the engine is not overheating , the radiator fans are normally not turned on (to save fuel) except if the AC (or windshield defroster) is ... My radiator fans will not turn on with AC on or off, even tried using defroster with AC on full cold or full hot, doesn't matter still won't turn on the fans. So I unplugged the cylinder head temp sensor and then the fans would kick on and stay on. I've replaced the temp sensor and the resistor in the front by the fans.

Set the thermostat on your AC unit to match the temperature of your room and turn on the ceiling fan. The result will be a cooling effect without having to lower the temperature in your entire house. Use the thermostat settings for both cooling and heating and turn on both your fan and AC at the same time.

Are you saying that with the cabin heater/AC fan turned Off, the radiator fans don't come on when the OBD-indicated temperature rises above 212 F? Whether or not there's a flow problem, the fans should be turned on by the ECM when the coolant temperature is high, without having to turn on the AC.Consider the possibility that the fan is actually doing its work. 2). The radiator fan comes on when you activate the AC. You left the AC on. This happens more frequently than you think. In other words, when you start the car, the radiator fan will come on in response to the AC, not the temperature in the engine. 3). The radiator fan must also turn on the air conditioner to work. The only other time the fan should turn is when the engine begins to overheat, but that only occurs in stop-and-go traffic or during hot weather, which is another reason it only operates while the AC is on. In conclusion, this is normal if your engine is not overheated. Test the fan motor. Connect the motor directly to 12-volt power with jumper wires to see if the fan spins properly. If it doesn’t, the motor is likely burnt out. Check the coolant temperature sensor. A signal from the coolant temperature sensor is what triggers the ECU to turn on the radiator fan, and if it’s faulty, it can prevent the fan ...Hook the Center wiper of your switch to a good , properly bonded ground. The normally open side will go to the FAN MOTOR side of the switch (or the relay coil side of the switch, if using a relay). In this configuration, it will turn ON any time you flip the switch. Doc imp:When one turns on then the other should also turn on. The radiator fan switch is suppose to be normally open at ambient temps. And close around 199 degrees F (fans should run when closed). The PCM can also commands the two fans to turn on. It can do this if the AC controls tells the PCM to turn them on.23754 posts · Joined 2007. #5 · Oct 11, 2020 (Edited) The ECM/PCM controls cooling fan operation. It processes information from the coolant temp sensor, ambient (outside) air temp sensor, A/C pressure switch, and possibly others to determine off/on/speed of the fans. 2020 Cadillac XT5 Sport, Shadow Metallic outside, Cirrus/Jet …With the increasing popularity of streaming services, more and more sports fans are turning to online platforms to catch their favorite games. For die-hard hockey fans, finding a r...Jul 12, 2022 · Your condenser fan / radiator fan should turn on with the compressor operating. If it's not, and the compressor works, then you could have a problem within the cooling fan systems. A high end diagnostic tool can interface with this system and command the fan to operate, verifying operation - and is needed to help troubleshoot the circuit. Use ...

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That leads me to believe that the condensor fan and/or the radiator fan is not running to blow cool the refrigant. So I opened the hood and turned the AC manually to the maximum. Bingo, after a while BOTH radiator fan and condensor fan stopped running (high speed or low), and then for 30 sec of so, they will try to spin up for a split sec and ...Greetings, My radiator fan doesn’t kick in until 219 degrees F. The radiator fan does kick in at lower coolant temperatures if I run the AC. Once the fan kicks in at 219, it cools everything down to 208 and then, if I am sitting and idling, the process repeats. If I am driving down the road, the van consistently runs between 195 and 210.The best remedy for this is getting your A/C serviced. From you description, it sounds as though the system isn’t building enough pressure, and by relation enough heat to turn the cooling fans on. In other words, the system is low on refrigerant. I would confirm this by connecting A/C gauges to the system to see what the pressures are on the ...Your Chevy Silverado‘s radiator fan has one of the most important jobs on the vehicle. It is the last line of defense between you and an overheating engine. If the radiator fan is not working, it’s a serious problem. Just because the radiator fan is not on does not mean that it is not working. They are designed to only run when needed.17 Jul 2021 ... If the AC is off, I believe it is normal for only one fan to come on unless it continues to heat up. When the AC is turned on, both fans ...The condenser fan (if it has a dedicated fan) or the radiator fan most always comes in (with AC on) when the compressor discharge pressure (or, alternatively, the liquid line one; look for where a sensor or a switch is located on the high pressure line) rises over an operative threshold.WOODY RUDY said: THE PCM commands the low speed cooling fans on when engine coolant exceeds 220 degrees. The PCM commands the high speed cooling fans on during the following conditions: engine coolant temp. exceeds 220 degrees and a\c refrigerant pressure exceeds 265 psi. If the fans don't come on at the temp. check the temp sensor or relays out.When one turns on then the other should also turn on. The radiator fan switch is suppose to be normally open at ambient temps. And close around 199 degrees F (fans should run when closed). The PCM can also commands the two fans to turn on. It can do this if the AC controls tells the PCM to turn them on.Mar 20, 2023 · The radiator fan should always turn on when the AC is on because the radiator fan doubles as a condenser fan. The condenser is a second smaller radiator sitting in front of the coolant radiator and serves to cool down the high-pressure refrigerant. Following are the possible causes of the vibration when the radiator is active and their solutions. 1. Imbalanced Fan Blades. Since the fan controls airflow when AC is on, it’s usually the first suspect. One of the possible issues might be an imbalance on the fan blades. Due to rough driving or a minor accident on the front bumper, the fan ...Jul 12, 2022 · Your condenser fan / radiator fan should turn on with the compressor operating. If it's not, and the compressor works, then you could have a problem within the cooling fan systems. A high end diagnostic tool can interface with this system and command the fan to operate, verifying operation - and is needed to help troubleshoot the circuit. Use ... ….

23754 posts · Joined 2007. #5 · Oct 11, 2020 (Edited) The ECM/PCM controls cooling fan operation. It processes information from the coolant temp sensor, ambient (outside) air temp sensor, A/C pressure switch, and possibly others to determine off/on/speed of the fans. 2020 Cadillac XT5 Sport, Shadow Metallic outside, Cirrus/Jet …That leads me to believe that the condensor fan and/or the radiator fan is not running to blow cool the refrigant. So I opened the hood and turned the AC manually to the maximum. Bingo, after a while BOTH radiator fan and condensor fan stopped running (high speed or low), and then for 30 sec of so, they will try to spin up for a split sec and ...Related to the powertrain. The problem RADIATOR FAN went out. Took it to a master mechanic {thats what hes known as} he said that it is normal for the fan to automatically power on when A/C is activated. The fan acts intermittingly. Will power on when necessary. Unless A/C is turned on, as previously stated.Related to the powertrain. The problem RADIATOR FAN went out. Took it to a master mechanic {thats what hes known as} he said that it is normal for the fan to automatically power on when A/C is activated. The fan acts intermittingly. Will power on when necessary. Unless A/C is turned on, as previously stated.Nov 7, 2010 · Totally normal. Note that if your Jeep hasn't warmed up all the way, if you turn off the AC, the fan will go off. Theoretically, if you are moving, it should turn off as well, but I don't know if that is the case, and it's kinda hard to check... Long story short, electric fan operation with AC on is normal. No worries. Read More: Should The Radiator Fan Turn On When A.C. Is On? Additionally, the compromised condition of the pulley can lead to excessive wear on the belt over time, intensifying the problem. Addressing issues related to a worn or loose pulley is essential to restore smooth and quiet operation of the radiator fan during A.C. use and …Begin by checking that all the power cords are plugged in, then locate the thermostat control for the unit and set it to your desired temperature. Next, find the unit’s main switch which will be either located on or near the front of the machine; turn this switch to “On.”. Finally, check that both fan speeds (low and high) are operational.Today I took let the car idle for a while, neither fans turned on. I drove around for about 10 or 15mins at low speeds and then let the car idle again. Periodically the A/C condenser fan would turn on and off to cool the engine, but nothing happens with the radiator fan. Keep in mind that the A/C is completely off during this time. My questions:Your Chevy Silverado‘s radiator fan has one of the most important jobs on the vehicle. It is the last line of defense between you and an overheating engine. If the radiator fan is not working, it’s a serious problem. Just because the radiator fan is not on does not mean that it is not working. They are designed to only run when needed. Should radiator fan turn on when ac is on, But paying attention to our cars’ cooling systems is equally crucial during these sweltering months. One common question that arises is whether the radiator fan should turn on when the AC is in operation. Let’s delve into this topic and explore the reasoning behind the radiator fan’s behavior. Understanding the Radiator Fan’s Function, Jul 12, 2022 · Your condenser fan / radiator fan should turn on with the compressor operating. If it's not, and the compressor works, then you could have a problem within the cooling fan systems. A high end diagnostic tool can interface with this system and command the fan to operate, verifying operation - and is needed to help troubleshoot the circuit. Use ... , I tested the fans for open circuits within themselves and they were good. Ground from the fan connector back to the relay tested good. one thing I noticed is that the left fan does not seem to turn on without the right fan. so even when the car gets up to Normal operating temp and kicks the fan on, both come on. I am assuming the low side., 5 May 2021 ... It will turn on as you roll to a stop usually. If it's warm enough. But even then it will many times turn off again while you are stopped. With ..., 2. Check the coolant temperature sensor. If the sensor is not working correctly, you have to change it, and the problem will most likely be resolved. 3. Check for a bad radiator relay and replace the bad relay with a new one to get the fan to stop running after the engine is shut OFF., Diagnosing Ac-dependent Radiator Fan Issues. One common issue with radiator fans is that they only turn on when the AC is switched on. This behavior indicates an AC-dependent radiator fan problem, which needs to be diagnosed and resolved promptly to prevent further cooling system complications., Feb 27, 2024 · Several factors come into play when determining when a radiator fan should turn on. Understanding these factors is essential for diagnosing potential issues and ensuring proper cooling system functionality. 1. Engine Temperature. The most common factor that triggers radiator fan activation is the engine temperature. , If the fan doesn’t turn on, you should check for a blown fuse or relay, damaged wiring, bad temperature sensors, or the wiring harness of the radiator fan. Radiator fan not turning on When AC is ON – Causes. Here are some factors that may contribute to a radiator fan not working correctly when the air conditioner is turned on. A Blown Fuse ... , Trying to choose between a steam or hot water radiator? Here’s what you need to know to ensure you pick the best fit for your home. Expert Advice On Improving Your Home Videos Late..., 17 Aug 2012 ... Radiator fan wont turn on automatically, but works with AC. · Mazda 3 Service Manual - Engine Coolant Temperature (ECT) Sensor Inspection [Mzr ..., On my old Pontiac Grand Prix, the radiator fan turns on whenever the AC is on (regardless of the coolant temperature). The dual-fan will also turn on when the AC is off and the coolant temperature is high (even after the engine is shut off). I haven't paid much attention to my newer cars if this behavior is still true. Not immediately in all ..., Science geeks, nerds and enthusiasts! Check out this quiz and see how much you know of Electromagnetic Radiation. Go! Advertisement Advertisement Science has provided us with so ma..., 14 Jun 2019 ... Once you start driving it will lower the fan speed and if you're going fast enough it may turn them off. Same principle works on your home A/C ..., Published by Dustin Babich on 11 June 2023. Radiator fan should turn on at approximately 200°f to 230°f. The purpose of the radiator fan is to maintain the engine’s temperature within a safe and appropriate range. If the engine overheats, it can suffer from catastrophic and costly damage. Thus, it’s crucial to ensure that the radiator fan ..., On many Hondas, both fans turn on when the AC is first turned on and the compressor is running and temp set to low and heater/AC fan turned on. So, check the sizes and I think that the fan that is running on your driver's side is the radiator fan. If it is larger than the other fan , it is the radiator fan., Oct 18, 2023 · A faulty radiator fan control module can disrupt the normal operation of the fan, causing it to only turn on when the AC is on. The control module is responsible for receiving and interpreting signals from the various sensors and activating the fan accordingly. If the module malfunctions, it may not trigger the fan at the appropriate times. , When the engine is cold the ETC switch should be closed ( that opens the radiator fan #1 relay) keeping the fan from running. When the coolent is hot, the ECT switch should be open ( closing the #1 relay) and allowing the fan to run. The second connector you found ,is probably it., The radiator fan in a car only turns on when the AC is running. This is a normal phenomenon and does not indicate a problem. The AC compressor generates …, Set the thermostat on your AC unit to match the temperature of your room and turn on the ceiling fan. The result will be a cooling effect without having to lower the temperature in your entire house. Use the thermostat settings for both cooling and heating and turn on both your fan and AC at the same time., Both fans should operate when the coolant temperature sensor located in the tank at the bottom of the radiator has reached 212°F. Both radiator fans must be running whenever an AC compressor has been on., Jun 15, 2022 · The radiator fan also plays an important role when the air conditioning (AC) system is in use, as the AC puts additional strain on the engine and increases the need for cooling. Understanding how the radiator fan works and when it should turn on when the AC is on is essential for maintaining the proper functioning of a vehicle. , The radiator fan is crucial in transferring heat from coolant to the air around the car. If it isn’t working, you’re going to have serious issues in short order. Depending on your car, …, 14 Aug 2006 ... (The fan should be called the condenser fan. Like all other direct injection diesels that I have owened, the fan is never needed by the engine., Radiator fan operation is controlled by the engine control module based on need or temperature of the cooling system. When driving, air flow through the condenser and radiator is adequate so the fans are usually off. Not moving reduces natural air flow so as the temp rises the fan or fans may be turned on. Just turning on the A/C may not …, One of them is, and one of them is not. Obviously if the car is designed for two fans to run at once, then it's not getting enough airflow at standstill and that causes my car to overheat. But if it is supposed to be that way, that means it's something else. 1986 Chevy K20, 350 4x4 on Megasquirt., First, you need to know that the problem is in the blower fan resistor. You would need to test and check it with the multimeter. You can skip this step and bypass the resistor by …, Start your vehicle, and let it idle for 10-15 minutes. Depending on the ambient temperature in your location, this should be long enough for the coolant temp to get hot and the thermostat to open up. Watch the vehicle and see if the cooling fan comes on. Driving your car is a good way to get the coolant temp hot., The electric cooling fan uses a direct current (DC) electric motor with a thermo switch, module or computer control to turn it on or off, depending on coolant temperature or AC operating condition. On older fan circuits, the thermostatic switch connects to battery power on one side, and to the fan motor on the other., There are 2 fans. Cooling fan and AC condenser fan. Right side is the condenser fan and left side is the cooling fan for your cooling system (not too sure). Which one isn't running? Your Cooling fan should not turn on if your engine is not over operating temperature threshold., 23754 posts · Joined 2007. #5 · Oct 11, 2020 (Edited) The ECM/PCM controls cooling fan operation. It processes information from the coolant temp sensor, ambient (outside) air temp sensor, A/C pressure switch, and possibly others to determine off/on/speed of the fans. 2020 Cadillac XT5 Sport, Shadow Metallic outside, Cirrus/Jet …, The radiator fan should turn on when the AC is on in most vehicles. This activation helps manage the additional heat generated by the AC system, aiding in maintaining the …, Start your vehicle, and let it idle for 10-15 minutes. Depending on the ambient temperature in your location, this should be long enough for the coolant temp to get hot and the thermostat to open up. Watch the vehicle and see if the cooling fan comes on. Driving your car is a good way to get the coolant temp hot., Those radiator fans will turn on automatically when the AC is on whether they are needed or not. When they are on, they keep the coolant temperature low. Even when you turn the AC off, the temperature still might not get hot enough to trigger the radiator fan on. In most vehicles, the coolant needs to reach 225 Fahrenheit for the fans to turn on.