3. cooling fan. It doesn't. The transducer is another story. Check that the radiator cooling fan engages when the A/C button is pressed. The engine control computer thinks the engine is running hot. Instrument fuse panel and circuit breakers. I need help. Make sure your engine or transmission is not overheating using a external thermometer if you have one. A/c on indicator, air conditioner relay, air conditioner switch, daytime running lamp module, daytime running lamp relay, rear wiper and washer motor, wide-open throttle cutout relay. Car was turned off for 9ish hours previous to this. Check if the compressor's clutch has been engaged. Cooling fans came on about 5 seconds later with key removed. The sending unit. If it stops, then the sensors are faulty and need replacement. 4. Changing the fan motor. faulty thermostatic temp switch not switching off. 3. You could use one relay. Allow engine to idle until cooling fans come on. The transducer is another story. The lower the coolant level, the less effective it’ll be. 4L. When I have the A/C turned on the fans behind the radiator ( 2 of them ) both cycle on and off. Posted July 18, 2016. I. Cooling fans do not come on. The cooling fan switch is found on the uppermost left side of the fan, with two wires. . - The A/C clutch requested. Ford Senior Master Technic. Temperature switch. Have already changed out the coolant temp sensor, control module, radiator switch, and two wire switch between the radiator and the motor, I think it is the thermal switch. When the coolant temperature reaches a certain threshold, and the engine rotates at full rpm, the radiator fan will operate. 4. 1. If necessary, a replacement relay costs around $20. I have a 01' New Beetle my cooling fans come on high speed when the ignition is turned on and stay on while the - Volkswagen 2001 Beetle question. Be sure to stay clear of everything in case it comes on. Often, the problem lies in the temperature sensors. Checked the fuses/relays, all good. Engine overheats. #4 · Nov 30, 2017. However, some vehicles can cost more, depending on the make and model, as well as the local labor rates. the second is to get a realay, hook the relay. Replacing the fan involved stripping off the front bumper skin and associated wiring. You can jump across the fan relay to confirm the relay's failure. Cooling fan continued to run. Run the engine up to temperature and when you'd expect the fan to cut in,place the leads across the switch terminals with the meter set to. Have replaced battery, starter, starter silonoid, ignition switch, ignition cylindar. Step 1: The Equipment. Minneapolis, Minnesota. A faulty coolant temperature sensor may cause an engine to run hot and increase fuel consumption. Bad ECU Unit. The cooling fan is powered by a relay in the Front Fuse Box, R12. Engine continues to turn over with the key out. E. Not a sensor fault. The yellow light suggests it is an electrical fault. I have a 1999 Ford Escort SE and the cooling fan will not shut off which of course drained the battery. A few clues: battery is new and holds charge fine generally. 1. When a/c head. The frequently asked questions about car fans still running even if the vehicle is already turned off. If it is burned, replace it with. As you may know the coolant fan relay turns the fans off and on by receiving information from the coolant temperature sensor at specific temperature thresholds. If the fan doesn't come on, we need to continue with the relay and it's wiring. This part can get really complicated, but the first thing to do is run the A/C with gauges connected to observe the system pressures and monitor the circuit from the PCM to the relays. nullptr said: It's fairly common for the fan to continue to run after the engine is turned off so it continues to draw air through the radiator and over the engine. 03. The radiator fan is designed to start functioning only when the engine is overheated. Poor air conditioning performance. In some cases, the radiator fan will require the radiator fan when the temperature sensor in the bottom tank of cooling fluid exceeds roughly 212F. Perfectly normal. Removed pressure switch and fan shut off. It ensures that the energy-intensive devices only run when needed, usually when the vehicle is immobile. the low speed relay is in the engine compartment fuse box, the other one is mounted near the battery. Depending on the model, the thermostat (sending unit) triggers the fan on at 185°F. Relays, you usually have multiple of the same relay, so you can swap them around and see if its the relay. This being said it works on the principal as # 1 said, The coolant has to warm to a point that the switch can open to be able to. There are many things that change the Fans meaning causes them to come on , Engine temp , Intake air temp , fuel rail temp etc etc The AC fan turning on comes from the head psi of the AC compressor , if you havent hit the turn on head psi then the AC mode of the fans wont turn on and the high head psi is at 3000+ rpm , and drops off below 3000-The fan running after the ignition is off is just a reaction to the higher temperature of the engine, it is normal for the fan to run after the ignition is off if the engine temperature is too high. Your Chevy’s engine control unit signals the fan when to turn off or keep running. Here are some solutions to the Chevy Equinox fan continuously staying on even when the engine is off: 1. For the first time since I bought my A4 in November 2016, the cooling fan ran on high speed for about 5 minutes after I turned off the car today. jhs914 said: I have posted here before about an intermittent problem with the radiator fan staying on after the engine is shut off. ChrisA said: If it's running from cold then this suggests the sensor or thermostat -unlikely both - has been "bypassed" either through a wiring problem at the point of connection to one of the units or, one of the units is malfunctioning to allow the current to flow to the fan. Observe the insulation on the fan wires to check for signs of frays or damages. If you are in all those modes, then when you place the key in the Fan will run. Hi All, My wifes 1. Start the engine and the fan should run instantly. 2. Ford Year: 2006. if dash fan is off it does not trip. At stops the engine shut off as expected. And if a relay fails, you will still have one fan running. The car coolant is the liquid that removes heat from the radiator. Radiator Fan keeps running after engine is switched off. If you clear the low voltage DTCs, see if any reoccur. 171,155. The car coolant is the liquid that removes heat from the radiator. The fan keep running after switching off is a safety measure when the ECM cannot read the temperature it will keep the fan blowing for 10 to 15 mins after you switch off to make sure the car is not in a situation where it can cause a fire (as the ECM cannot determine if the engine is ice cold or. - Rodney. Just turn the wheel back and forth until the ignition cylinder is freed. If you turn the "service selector" switch to off (heat/AC/vent switch), then the blower shuts off . Replace Fan Relay. 8V; the grey red wire was consistently reading below 0. Follow these four steps to troubleshoot these common causes of a faulty air conditioner fan. If your temperature gauge still operates when the ignition is switched off, as it does on some cars, you will see. With the ignition switch ON, turn on the air conditioning switch. Confirm if the coolant is not overheating but the engine is!! Run the A/C keeping the thermometer in the coolant and allow the fan to kick on. The problem still occurs with the fuse removed. 2000 FORD ESCORT: COOLING FAN. then around 10-20 seconds later the fan starts on full; when this happens, the fan never seems to stop. Just started it cold, brought into garage, turned off the engine, and I can hear my low speed cooling fans running. Example: Testing the radiator cooling fan relay, the cooling fan should be operating. Nothing to worry about. 1. Cooling fans came on about 5 seconds later with key removed. Stretch out the 12-gauge jumper wire and extend its other end to reach the vehicle’s battery. Cooling fan only comes on when i turn the a/c on then i turn the a/c off and it stays on for about a minute then goes off and won't come on again unless i turn the a/c back on. Remove AC fan relay. Below are the major functions of the radiator cooling fan: The primary function of a radiator cooling fan is to take away excessive heat absorbed by the engine. They should cut off after the temperature drops roughly 50 degrees. Check for a faulty radiator control module and do a replacement. Conditions: Air temperature 30 degrees F. Electric engine cooling fans are used to help remove the excess. The situation when the car radiator cooling fan keeps running constantly can be caused mostly by a failing coolant temperature sensor or its wiring, broken fan start relay, damage to the electrical wires, and electronic engine control unit (ECU) problems. When the car comes off the truck at dealer new,there is a fuse under the hood that has to be installed. With a jump I was good to go with no problems until I shut it off and the fan kept running. Associate Degree. 4 engines have dual cooling fans - part of the Severe Duty II cooling system these are equipped with. Newer cars turn the fan on between 212*-215* so 200* is perfect. Thank you. (See Diagram #5) 3. repeatedly. My other Accords would stay on longer and not repeatedly turn off and on so I was concerned. You could be having a faulty temperature gauge or sensor, a stuck relay switch of your radiator fan, or a leaking. BTW yukiz is referring to the MFI or fuel pump relays. Thus to run the fan, R12 needs to be on to supply power to the fan module, and the fan module will. So they both work now. Just turn the wheel back and forth until the ignition cylinder is freed. Sometimes when you turn the car off, it takes a few minutes before they kick on. ECU malfunction. I have included some diagrams and sensor location below, Be sure to check your air. Ford Year: 2006. Push down on either end of it to release the clip. #30. As Dadu says, this feature is pretty standard across all manufacturers. The relay operates the fan when the engine coolant temperature exceeds 106°C (223°F) The cooling fan will turn on automatically during extended idle conditions under 5 miles per hour. Pricing:---Eautorepair. 2. Even if the fan is not running when the. Your Chevy’s engine control unit signals the fan when to turn off or keep running. The way to determine if the fault is from the fan relay is by replacing it, running it, and determining if the problem persists. If you turn the key on, they shut off and everything seems to be normal. Replaced the relay, still turns on when key. The fan is a 3 wire design, which you can see if you detach the harness. A defective ECU will result in the fan not knowing when to stop running. Since the cooling fan plays a factor in air conditioning performance, your air conditioning may not blow cold air. A new motor is supplied without a fan, which must be refitted from the old one. Faulty coolant temperature sensor can also lead to erratic fan behavior, and it may require calibration or replacement to fix the issue. One sign of a bad ignition switch, is the instrument panel not lighting up, when the key is turned. We had some pretty heavy rain the other day in MA and my wife drove through a knee deep pool of water. A successful test again demonstrates that the power supply to both cooling fans is good and that both fans, the AC relay, and the cooling fan relay are working properly. There are three ways to check for a bad terminal. #5 · Nov 7, 2003. This is not. Kevin. . This doesn’t have much bearing on diagnosing problems, but it’s a key difference from the more traditional fan designs in the earlier Jeep JKs. Now the resistor board part is fastened to the air vent with two Philips screws. #2 · Jun 13, 2012. 3. Fan noise and added electrical system load will be present at all times. my 97 escort cooling fan and fuel pump come on when the ignition key is turned off. The fan circuit always has power. I have a 01' New Beetle my cooling fans come on high speed when the ignition is turned on and stay on while the motor is running. I have a 1993 Ford Escort Wagon with the 1. Insert thermostat probe into radiator hose. Check if air blows with the fan setting turned to high. Unplug the fan connector, closest to the fan. On the 96 ti, there are 2 yellow relays. Also check your Diagnostic Trouble Codes and address them and clear your Control Module. If the thermostat is broken, it can cause the fan to run even when the engine is off. 1. May 5, 2020. the fan thermostatic on /off switch is set that way to cool down the motor and not warp the head or block. Options. Front defrost button on. read more. Low Coolant Level. 2. When she came home and turned the car off, the fans came on a moderate speed about 15 minutes later, stayed on for a few minutes and then shut off. Radiator Fan Motor Replacement. Vocational, Technical or Tra. Inspect the wires and the wire connections; if they are cracked. The top two relays are the ones we are interested in. Just started it cold, brought into garage, turned off the engine, and I can hear my low speed cooling fans running. Yes. Before installed it is in Delivery mode. 1. 2). 2058 posts · Joined 2017. It will be commanded on by the PCM depending on what value in the algorithm is too high. Yes, typically after rainy days, I can never get the interior lights to go out after the ignition key has been removed. If the coolant level is.