All information is provided "AS IS." to this site, and use it for non-commercial use subject to our terms of use. Let it cool down first. That’s why your AC is not cool. Also, it may cause the A/C compressor to overheat and fail. If you do need to replace the fan, make sure that the replacement has the right CFM rating for your vehicle. Electric Cooling Fan - What Can Stop It From Working Properly And Why If your engine is overheating, or shows signs of running hotter than normal; you may have a problem with your electric cooling fan. You may freely link I would confirm this by connecting A/C gauges to the system to see what the pressures are on the high and low side of the system. The trigger is the thermostat in the radiator of your vehicle. 1996 Chevy Cavalier 2.2 lt engine. The cooling fan motors work together with the cooling fan blades to pull air through the radiator. 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. check to make sure the rad cooling fan is working if not it could be a bad fan motor, temp sensor for the computer to turn on the fan or a fan relay. If it does end up being this sensor, they are very affordable. If the sensor isn’t working, your fan won’t come on because it won’t know that the temperature is hot enough to require activation, which can frequently lead to overheating. When I hot wired the passengers side fan it will work. … I have a steam radiator system that works pretty well in most rooms. To check an electric radiator fan, start the car and let it get up to the temperature where the fan normally kicks on. The ECU is responsible for starting the radiator fan once the engine gets hot. But if it’s not, which means the fan has gone bad. The cooling fan is turned off and on as needed by the engine's control computer based upon information from the coolant temperature sensor. a temp sensor only monitors what the engine temp is it will not cause the engine to overheat or run hot. I did a direct connection from the battery to the terminals of the fan and the fan turns on just fine. DoItYourself.com®, founded in 1995, is the leading independent Fan Clutch. Refer to the top or side of the relay to locate these terminals. It does not turn on, when A/C is turned on ( I realized AC is also not working on my car, it may be related or not). There are springs within the fan clutch that can wear out or corrode over the years. Just because the radiator fan is not on does not mean that it is not working. ran heat at 90 degrees a few minutes. If you see the engine heating but the radiator fan isn’t, the fan wires could be the culprit. NOTE: It is possible to have a Check Engine Light (CEL) and a number of Coolant Temperature Sensor (CTS) codes set due to the overheat condition caused by … Your Camry’s radiator fan will not kick on. Start by unplugging the wires. Tips for Troubleshooting High Truck Engine Temperature. They should be putting out around 12 volts of direct current. No noise when just the engine is on and cooling fans (radiator) are on. Without the coolant hitting the sensor, the temp reading will be significantly lower than the actual engine temp. If the engine coolant level isn’t high enough to keep pressure in the engine it will run hot. Fuse. Usually a faulty cooling fan relay will produce a few symptoms that can alert the driver that service may be required. Your Silverado’s radiator fan will not kick on. These are the facts: 1. then noise is only when the heat/ac blower is on and engine is on. If your ECT sensor is bad, your cooling fan may not kick in. If necessary, a replacement relay costs around $20.There are three ways to check for a bad terminal. Your Camry’s radiator fan will not kick on. If you do have low coolant, don’t fill it up until the engine has cooled off. 8L90E Specs, Performance, and Identification, TH400 Transmission Specs, ID, and Common Problems, Volkswagen Eos:  EPC Light → Causes and Diagnosis, Toyota FJ Cruiser:  Radiator Fan Not Working Diagnosis, Chevy Impala: Brake Lights Stuck On → Diagnosis.