Should radiator fan turn on when ac is on

Thanked: 660 Times. re: Cooling fans turn on and off repeatedly, when the AC is on. Get your radiator and ac condenser cleaned with a pressure washer. Repeated kicking of fans occurs because the condenser alone is not able to dissipate heat owing to dust accumulation. ( 1) Thanks.

4 Aug 2014 ... If the AC button is on and the fan is on and the ignition is on, but the engine is off, the radiator fans will turn on constantly. If I turn off ...Jul 2, 2023 · A radiator fan only turns on when the air conditioning system is switched on because the AC compressor requires additional cooling to prevent it from overheating. The radiator fan helps cool down the engine and other components of the car by blowing air over them, thus preventing damage due to excessive heat. So, the radiator fan should turn on once the engine is fully warmed up, or when the air conditioning is turned on. If the Fan does not Come On at All. What is the problem if my …17 Aug 2012 ... Radiator fan wont turn on automatically, but works with AC. · Mazda 3 Service Manual - Engine Coolant Temperature (ECT) Sensor Inspection [Mzr ...Should Radiator Fan Turn On When Ac Is On. In short, yes. A car’s radiator fan should always start spinning once you’ve turned on the air conditioning unit. This is necessary, as your car’s AC unit is reliant on the radiator fans working for its heat exchange process. Basically, it forces air to flow over the AC condenser, getting rid of ...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: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.Dec 7, 2022 · AC running without coolant fan coming on. I have a 2012 Chevy Cruse LT. It is my understanding from a mechanic and these forums that the coolant fan should be running when the AC is turned on. It currently is not and the mechanic can find no reason why. The dealership even indicated they were not aware of any issues.

Color television sets made before the 1970s put out a small amount of X-ray radiation, generated by the high voltages inside the equipment. Although hazardous, it is not the type o...Mar 2, 2024 · Here are some common remedies to consider: Replace the Fan Motor: If the radiator fan motor is found to be faulty, it will need to be replaced. Disconnect the electrical connectors and remove the old fan motor. Install a new motor and reconnect the electrical connections following the manufacturer’s instructions. A radiator fan that is constantly on may be triggered by the air conditioning when it is on. Be sure the air conditioning is off. If the radiator fan is still constantly on, it is most likely caused by the fan relay being stuck closed. Replace the fan relay. If this is not the issue the temperature sensor or ECU may have a problem.The most common causes of why a radiator fan is not working are a blown fuse, a bad relay, or a broken wire. It can also be caused by a faulty coolant temp sensor, low coolant level or the fan itself can be damaged. While these are some of the reasons, the list is not exhaustive. Here is a more detailed list of the most common causes of a ...The sensor on the radiator only controls the fans, it should turn on the fans at 196 - 203 F. The sensor on the engine is used by the gauge and the ECM, that is the measurement called ECT on a scanner. That temperature is controlled by thermostat, the cooling fans help transfer the heat away from the engine. Typically the fans do not run while ...

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.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.The fan generally turns on when the engine temperature gets to 95 deg. C., or when the AC gets turned on. It's possible that your engine temp is at, say, 90 Celsius, which is a bit higher than normal ("normal" is 80-85 C), but still well within safe limits. That can happen when you are, for example, doing a lot of in-town driving.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.2813 posts · Joined 2010. #3 · Jul 7, 2012. No the AC will turn the radiator fan on to pull air across the condensor. Your going to need to check for power at the fan, the fan can still be failed and spin just fine by hand, considering you dont have high or low I would lean towards a fan or fan connector concern.The fans are run by either the radiator sensor or by the a/c run sensor. either one should turn on both fans. To have the temp sensor and the a/c condenser fan sensor go bad.... sound like you may have a bad ground connection to the fans. you can try jumpering terminal #4 of the radiator fan relay to ground, and see if the fans work.

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Jul 2, 2023 · A radiator fan only turns on when the air conditioning system is switched on because the AC compressor requires additional cooling to prevent it from overheating. The radiator fan helps cool down the engine and other components of the car by blowing air over them, thus preventing damage due to excessive heat. 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.Mar 16, 2023 · If there is a spike in amperage or the motor is failing, the fuse could blow. You can replace the fuse and hope it was just a glitch. However, if the fuse continues to blow, there’s a bigger problem occurring. 3. Vehicle Overheating. The purpose of the radiator fan is to cool the vehicle. Radiator fans turn on and off at stop w/ ac on. I just bought a stock, except for a muffler, '04 wrx with 97k on it and I just started noticing that when I'm at a stop and the a/c is on the fans will turn on and off every 10-20 seconds. I've put maybe 700 miles on it and cleaned the iacv a few hundred miles back, also replaced the iacv gasket ...I have the same issue, radiator fan and condenser fan only come on when you push the ac button to on and when it is hot at a red light the oil light comes on so we turn on the fans and the light goes off. What I have done so far. changed lower rad hose, burped it and replaced three grounds, battery to body, battery to engine and engine back to ...

sw " terminal 1 " ground, and radiator fan relay no. 1 and no. 2 are turned on. radiator fan motor operation: when the ignition sw is turned on, radiator fan relay no. 1 is turned on. if at this time the engine coolant temperature is approx. 194 f or higher, the water temp. sw is turned off, radiator fan relay no. 1 is turned off.I have one on high and low as the cooling electrics are commonly what send the cars to the scrapyards. FYI, PCM activates high fan around 230 F. or over 270 psi highside pressure with a/c on. Low fan on at 220 F. and a/c on; both numbers can vary by 5 degrees and even at each application.The radiator fan switch closes above 199°F (93°C). This means that the radiator fan switch turns on the radiator fan relay, which in turns activates the radiator fan motor. When you turn on the A/C. Both fans are activated and run continuously until the A/C is turned off since the PCM bypasses the radiator fan switch. Alright, let's get testing.Close everything up, start the car, and check whether the radiator fan now works (set the A/C on full blast). If it does, you have fixed the problem! If the fan does not work, check the new fuse to be sure it has not blown. If it …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. 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. So, the radiator fan should turn on once the engine is fully warmed up, or when the air conditioning is turned on. If the Fan does not Come On at All. What is the problem if my …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 radiator fan switch closes above 199°F (93°C). This means that the radiator fan switch turns on the radiator fan relay, which in turns activates the radiator fan motor. When you turn on the A/C. Both fans are activated and run continuously until the A/C is turned off since the PCM bypasses the radiator fan switch. Alright, let's get testing.

10 Aug 2012 ... It does not close the circuit to ground until the coolant reaches about 225 deg. F. This is the switch that will keep the cooling fan running ...

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 ...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. 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 ... Most manufacturers turn cooling fans on/off around 220 Fahrenheit. 2011 Ford Mustang GT, Aluminator XS 5.0, Tremec Magnum XL T56, SW long tubes, Torsen diff and more. Very due to emissions. Settings are high to burn any emissions off.Would anyone know at what temp the radiator fans are programmed to come on? Also, what is your engine temp on the highway? I am getting ~215 degrees at 75mph on a 90 degree day with no trailer, AC on, in 10th gear. It will jump up to 225 under hard acceleration or going uphill. 2018 3.5L Ecoboost.Check the Coolant Temperature Sensor: Utilize a diagnostic tool or a multimeter to verify the proper functioning of the coolant temperature sensor. Ensuring it works as it should is key. 3. Inspect the Fan Relay: Move on to inspect the fan relay. If it’s damaged or stuck, you’ve likely found the root of the problem.Your Ford Escape‘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.sw " terminal 1 " ground, and radiator fan relay no. 1 and no. 2 are turned on. radiator fan motor operation: when the ignition sw is turned on, radiator fan relay no. 1 is turned on. if at this time the engine coolant temperature is approx. 194 f or higher, the water temp. sw is turned off, radiator fan relay no. 1 is turned off.

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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...I have the same issue, radiator fan and condenser fan only come on when you push the ac button to on and when it is hot at a red light the oil light comes on so we turn on the fans and the light goes off. What I have done so far. changed lower rad hose, burped it and replaced three grounds, battery to body, battery to engine and engine back …If your electric radiator fan isn't coming on after the engine reaches operating temperature—the key here is operating temperature (more on this later)—you can bet …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 bad fan controller module; Broken radiator fan; Bad wiring connections; Bad AC high-pressure sensor; How To Fix Radiator Fan Not Working When Ac Is On. Replace broken cooling fan; Inspect the relay and fuse; Check the coolant level and the temp sensor; Check the wiring and the fan controller module; FAQs: Q: Should the …8 Jul 2011 ... Usually just turns on and off once the engine reaches operating temp in order to keep the temps stable. It also turns on when you turn the AC on ...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 ...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 …Yes they should be on at the same time. There's controls that can be added so the compressor runs and the fan cycles on and off in cool weather but when it's hot they both run at the same time. Compressor shutting down with the fan on means the compressor is overheating. Reply.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 ...28 Nov 2007 ... the fans don't turn on until they are needed or you turn on the AC manually... (btw, 35 isn't CLOSE to really cold! my daytime high yesterday ... ….

The radiator fan should turn on when the AC is on for optimal cooling performance. Here are 5 key facts that reveal why this is important. 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. ...Whether or not the fan should be on when the AC is on depends on your specific needs and circumstances. If you want to improve air circulation, reduce hot spots, and maintain a consistent temperature, running the fan and AC simultaneously can be beneficial. However, it can lead to increased energy consumption and more frequent …I have the same issue, radiator fan and condenser fan only come on when you push the ac button to on and when it is hot at a red light the oil light comes on so we turn on the fans and the light goes off. What I have done so far. changed lower rad hose, burped it and replaced three grounds, battery to body, battery to engine and engine back to ...Should Radiator Fan Turn On When Ac Is On. In short, yes. A car’s radiator fan should always start spinning once you’ve turned on the air conditioning unit. This is necessary, as your car’s AC unit is reliant on the radiator fans working for its heat exchange process. Basically, it forces air to flow over the AC condenser, getting rid of ...1. During normal use of the veh. without AC, the Coolant Temp. Sensor and the ECM monitor coolant temp. When the coolant reaches a predetermined degree. it will send a CAN message to the AAM to turn on the aux. fans, via pin #8. When the coolant reaches another predetermined degree, the fans will be turned off.Dec 7, 2022 · AC running without coolant fan coming on. I have a 2012 Chevy Cruse LT. It is my understanding from a mechanic and these forums that the coolant fan should be running when the AC is turned on. It currently is not and the mechanic can find no reason why. The dealership even indicated they were not aware of any issues. So my radiator fan will only come on when I turn the AC on. I have watched my water temp stay at 210 and start to go up (230) and the fan still not kick on. My transmission temp will also go up to 200 as high as 210 with the fan kicking on. As soon as this happens I turn on my AC and the water temp and transmission temp both start to come down.Apr 11, 2014 · Please help i have a 1998 hondaaccord 6 cylinder it keeps over heating so far i have changed thermostat, fan relays, thermostat switch i noticed my fans only turn in when the ac and or heater are on. for this reason i have some people telling me my fans are fine and its my water pump please ,let me know some opinions im desperate since water ... Should radiator fan turn on when ac is on, [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1]