Should radiator fan turn on when ac is on

The simplest method of wiring an electric fan is to use a relay that is switched on and off by the ignition switch. This method works well to cool the vehicle but the drawback is the fan will be running constantly when the ignition is on. Fan noise and added electrical system load will be present at all times.

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)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: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 ...You may wonder, should the radiator fan turn on when AC is on? Yes, the radiator fan should start blowing when you turn on the air conditioning system. Factors like a blown relay, bad temperature switch, a blown fuse, frayed wiring harness, and low coolant temperature can prevent the car radiator fan from coming up when the AC is on or off.Join Date: Feb 2009. Location: kk. The fan comes on only when the air con is turned on and there is enough pressure to activate the system, thus high pressure equals fan on to cool and lower air con gas pressure. Secondly fan comes on with engine water temp too hot, the fan comes on briefly untill engine has cooled sufficiently.Nov 8, 2023 · In most vehicles, the radiator fan does turn on when the AC is on, as it helps to dissipate the excess heat generated by the AC system, ensuring optimum performance and preventing the engine from overheating.

Radiator fan is overridden to on when AC is on. Maybe the Fan had an issue in the vehicle you got rid of, which is making you think the new one is the problem. As stated the fan must run anytime A/C compressor is required to run which is in A/C and/or defrost mode. The extra airflow is required to cool the condenser.Mar 6, 2024 · Yes, the radiator fan should turn on when the ac is on as it helps to cool the refrigerant and maintain proper engine temperature. When the ac is turned on, the compressor puts an added load on the engine, which generates more heat. The radiator fan assists in dissipating this excess heat by pulling air through the radiator. 7 Feb 2021 ... If I turn the AC on, it does run, for maybe 15 seconds at a time, about once a minute. Seems to be low speed when it does kick in. It has ...2. High Temperature. Regardless of your vehicle’s speed, if the engine’s temperature sensor detects that the temperature is exceeding the normal operating range, it will signal the cooling fan to turn on. This helps dissipate the excess heat and return the engine to a safe operating temperature. 3.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. Refrigerant Pressure Sensor INPUT to the DME is ONE of the Inputs used by DME to Control Fan Speed, ALONG WITH Engine Temp, Vehicle Speed, Cat Temp, & Battery Voltage. Your Radiator Fan or E-Fan SHOULD begin to run within 30 to 40 seconds of turning on Compressor Valve (Snowflake button on A/C Control Panel), and …

Sep 1, 2020 · And is the engine overheating? Another possibility is you have a stuck open thermostat and the engine may never get hot enough to trigger the fan. Our engines have two thermostats, a 173 deg. F (78 C)main stat and a 203 deg. F (95 C) secondary. If either of them stick open it may allow too much cooling. -Todd. 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, …Just noticed while running with the AC off that the temperature was going up (102C) and fans were completely off. Checked the service manual and when AC is off, the fans start based on the coolant temperature alone. Meaning they should start at low speed at 99C(210F) and at 105C(221F) go to high speed.Zendaya is not only a talented actress and singer but also a fashion icon who consistently turns heads with her impeccable style. From red carpet events to casual street style, she...A dirty radiator. The radiator may need a thorough cleaning if the fan is always on when the car air conditioning (AC) is also on. Bad or broken wiring. Wrong wiring or broken wiring can cause a short circuit. Observe the insulation on the fan wires to check for signs of frays or damages.

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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 ...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.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).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 …If you find yourself caught in a traffic jam with a hot engine, keep your car in neutral and rev the engine up a little bit. While the person next to you may think you want to race, this will make the water pump and radiator fan (if it is turned directly by the engine) speed up, which will aid in cooling the engine. Try to avoid riding the brakes.

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.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 …Jan 3, 2018 · Things become normal, but now from 2 days its happening again. I used the scanner and checked the coolant temperature, at normal temperature 95C fan do not turn on. When temperature rise above 100C (I noticed at 105C) fans turned ON. When I switch ON AC then temperature stay on normal. What can be a problem? My guess is the temperature sensor. The air distribution is uneven because the fan turns off once the set temperature is reached. Due to frequent turning on and off, the blower motor may wear out quickly. Benefits of ON setting. Hot/cold spots in your room will be reduced due to the even distribution of air. The lifespan of the fan increases as the stress is decreased.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.27 May 2022 ... This is clear in the Electrical Manual of these models. The way they are wire is this: 1. When engine is not hot and AC is OFF, both fans are ...Feb 10, 2014 · Our thermostats should be fully opened by 195 F/90 C, and cooling fan should be coming on by 210 F as far as I know. I'd consider changing thermostat if you're over 80K, and definitely suspect that cooling fan cause something isn't right. 2007 Phantom Purple hatch; JBR RMM/busihgs/shifter plate, Koni STR.t's, Michelin Pilot AS3's, Spin on oil ... 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.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 ...

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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.If you notice the radiator fan not working when AC is on, you should seek professional advice. A lousy radiator fan can create car air-conditioning (AC) issues. This is because the radiator cooling fan creates double the amount of air that the condenser fan. ... On the flip side, the electric radiator cooling fan will only turn on when the car ...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.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 ...Oct 11, 2019 · 4wheelin Discussion starter. 675 posts · Joined 2011. #1 · Oct 11, 2019. While sitting in backed up traffic, temps based on the digital dash go up to 226. I have to turn the A/C on medium fan setting in order for the engine fan to cool the temps back down to 200-210. This is during 60 degrees outside temp. When driving, temps stay between 199 ... 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 …Thanks guys for the ideas. Here is an update: 1) nothing is blocking the fans., they spin freely. 2) the fans do turn on and run at times. (at both low and high speeds) 3) I replaced 6 relays and no change. 4) I replaced the fan control cpu and it looks like the fans are turning on sooner, but not always.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 ...Placing your fan in the right spot can help slash AC costs. ... One big thing you may be overlooking when you turn on a fan is its placement. To ensure optimal cooling …

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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.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 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. Your engine temperature sensor is responsible for relaying your engine temp to the ECU. Once the temp gets so hot, the ECU commands the radiator fan to come on. If your CR-V has a bad engine temp sensor the radiator fan won’t know to come on, because the ECU won’t know how hot the engine is. You’ll need to locate and test the engine temp ...2013 f150 ecoboost and am having the same issue. Radiator fans run on high anytime the AC is on. They usually kick on within 10-15 seconds of turning the AC on and run about 90% of the time I'm driving. The only way to get the fans to shut down is to either 1) turn the AC off completely or 2) turn the truck off.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.A dirty radiator. The radiator may need a thorough cleaning if the fan is always on when the car air conditioning (AC) is also on. Bad or broken wiring. Wrong wiring or broken wiring can cause a short circuit. Observe the insulation on the fan wires to check for signs of frays or damages.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.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. ….

Reasons For Using A Fan With An Ac Unit. Yes, the fan should be on when the AC is on. A fan helps to evenly distribute cool air throughout the room, making it more comfortable and efficient. It also helps to reduce humidity levels in the space, which can make it feel cooler than if a fan was not used. Additionally, using a fan helps to ...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. My fans will only turn on when the AC is on. I have replaced the thermostat recently, coolant temp sensor, and changed both my relays for cool fan #1 and cool fan #2. I have also tested continuity for all my fuses, and they all checked out okay. And at the port where the relays should be getting power, it reads 12, indicating the relays are in ... 1. Radiator Fan Doesn’t Come On. Most commonly, the faulty fan won’t enable when it’s broken. This is caused by the motor burning out, rendering the fan …When the AC is on, the radiator fan’s function is crucial for maintaining optimal engine temperature and AC system functioning. Here are some frequent …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 ...Yes. The fan on your AC will blow when the unit is set to cool. The fan is what helps distribute the cool air evenly throughout the house. Once the temperature inside the house reaches the desired input that you put into your thermostat, the cool air will stop. And depending on whether your AC fan is on auto or on, the fan will either turn off ...If the outside air temperature is near or below freezing, the ECU will prevent the A/C from running. And if the ECU isn't turning on the compressor, it will also not turn on the radiator fans. Also, if the outside air is cold,with the A/C off, the engine might dissipate enough heat through the block and radiator without the need for the fans ...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. With the growing popularity of online shopping, more and more people are turning to the internet for their grocery needs. If you’re a fan of M&S food and want to buy their products... 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]