The radiator fan doesn't seem to be working. I

on the thermal switch there is 3 wires going into it that turns on the fan at temp and also tells the ecu what temp the engine is at. both radiators have them fitted to them.

Most relays are identical, try swapping it with another one to see if the problem remains. If your coolant gauge is working fine, I would not suspect the sensor. Make sure to check fuses too.

The first thing I would check is the fuse associated with these fans. If that is ok then I would suspect the temperature sensor that controls the fans.

http://www.pc4cracked.com/2017/08/platinum-hide-ip-3-5-6-8-license-key

OK, you have addressed the first possibility. There are a few more, each progressively more expensive to fix. First, are the radiator electric cooling fans operating? If you find the vehicle runs ok on the highway, but overheats around town in stop-and-go traffic, it could be that the fans are not running. Quick check for the fans - with the ignition on (the engine doesn't need to be running), move the cooling control to the A/C position. If the fans come on, they are good, but you could still have a fan-related cooling problem. If the fans don't work, you have a problem. If the fans worked, the car runs fine at highway speed but not in town, then suspect the coolant sensor that engages the fans. If the fans work and the car overheats in all conditions, then a system blockage is possible. Blockages occur usually one of two ways: Radiator rust/corrosion, and collapsed radiator hoses. Radiator corrosion will require radiator replacement; if it is blocked badly enough to overheat, flushing it is a waste of effort, and could cause more problems with all the **** you circulate into the engine. If the system is low on water (air in system) it can rise to the top radiator hose and cause it to collapse partially or fully, restricting flow. Some engines have water jackets that extend higher than the radiator cap, so they can trap air. These cars have bleeder ports at these locations to remove to trapped air. Check to see if that is the problem.

Are you saying your car heater doesn't work? don-ohio

You have to sensors one on the motor and one on radiator they could be faulty the other is a faulty relay check to find out where they are located in fuse box with the ignition on but car NOT started take out the relay then put it back in a noticeable click will be heard this is the relay activating and is ok The relays may be located under the dash or in engine compartment

I would be looking at the radiator fans themselves, especially if the fans are open
framed motors. I had the same problem with an intermittent fan on a PT cruiser,
If your A/C doesn't seem to be working right at stop lights then the fans are
most likely not operating correctly since they assist the condensing coil when idling.
Second thing I would suspect is a thermostat which is stuck closed. (This will cause overheat).
Hope this is helpful.

First check to make sure you have no oil reidue in your cooling system. What you describe is a common symptom of a blown head gasket or other combustion chamber leak. Also check your oil and make sure it doesn't have a milky appearance. If both of those check out, run the car with the radiator cap off and let it get up to normal operating temperature. You should see the coolant flowing through the radiator. If you don't see the flow at normal operating temperature, suspect the thermostat. When the car reaches normal operating temperature, the fan should also cycle on and off. If it doesn't check your fuses and relays to make sure they're OK. If they're good, try applying a seperate 12V source to the fan. If it powers up then suspect the fan's thermostatic control. Good luck.

Your friend is right. To answer your other question these are two totally seperate fans but that does not mean that one fans fuse or relay did not affect the other. You should check your fuses and which ones, if any, are blown. It is likely that during your radio installation a bare contact touched something and blew the fuse(s). If the fuse is blown and, when you replace it and work your heater fan, it blows again then chances are your radio may have cut a wire upon sliding it in. Reply back to this post and let me know.