2007 Nissan Maxima Cooling Fans Not Working

If the low side sucks into a vacuum quickly i would suspect a low system.

2007 nissan maxima cooling fans not working.

I have checked the fuses and replaced the fan relays still the fans are not working. This could be as simple as air in the system or a faulty water bump. Can be either your coolant temperature sensor not working to let the fans know to turn on or your thermostat is stuck close or the fuse for the fan may need to be replaced. What would cause the radiator fan to not kick on.

2006 nissan maxima radiator fans not kicking on overheating. Posted on jun 19 2009. If the high side spikes and the fans don t turn on i would suspect a problem with what is called the a c pressure transducer high side switch one or both fan relays the fan motors themselves an ambient temperature switch or the sun sensor. Once the temp gets so hot the ecu commands the radiator fan to come on.

The sensor could either be bad or you may have a blown fuse or disconnected wire. If your certain that both fans are running them your likely looking at a coolant circulation problem at idle. Ideally you need to start by burping the cooling system and see if that fixes the problem. Another possibility is low water level.

Some of the links on this cha. You have the right idea. Need read more. If your altima 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.

Your engine temperature sensor is responsible for relaying your engine temp to the ecu. Check the fuse box on the driver side under the hood. I have checked the fan motors and they work. Get a dvom or testlight first because to test the fuses or relays and their terminals you need to know if battery voltage is present.

To test the fans disconnect the fan connectors and ground one terminal while applying battery voltage to the other but this fan should have 4 terminals so you might make a mess out of it. Yes you can replace a single relay that is coming from a shop that does not know what it is doing however most likely will have to go to a junkyard then use scanner and reset your trouble code then unhook both battery cables then pull old relay out just like a fuse watch at this point insure your reinstall replacement relay in the exact same fashion as the old one came out or you are in for a whole separate set of problems also you will need to consult bottom of relay to insure you. The radiator fans are not working.