Fan relay switch

SOURCE: 2002 PT Cruiser LE (no Turbo) Overheating. (Fan

There is no machine for this,however a VERY skilled auto electric shop might be able to help.They really have to have a Gift with car wiring to fix your problem,it can be FIXED,find the right shop in your area.I will try and think this through to help you,this is what I used to do,It's not a book problem it is experience that will fix your car. I do have a question? How does your car run without the AC on?

SOURCE: 2003 Dodge Town and Country Van, 3.8 V6. Where is

Down by the bottom of the radiator. pass side. on the frame/rad support. You probly have to remove front splash shield to get to it. I have never had to remove or change one.

SOURCE: 2006 pt cruiser, cooling fan motor stays on after

check the fluid in the radiator, and replace the thermostat the way it is positioned it could stop the flow from the radiator and keep the fan from turning off, I have found on several of them that I have worked on that the thermostat was bad. hope this helps. Only other things that would cause this or most common is the antifreeze is bad or the water pump is defective or you have a bad radiator hose but have not seen this on any I have worked on.

SOURCE: overheating

Ok, here is what I have found with the overheating problem with my 2002 PT Cruiser. I have got all the symptoms that everyone else has gotten form, it heats then cools down, gets hot when it idles, gets hot when AC is turned on. The bottom line here is that it gets hot when it is not going down the road or it may raise a little then go back to normal. This is what I have found after a new water pump, radiator, thermostat, cooling fan. What is happening is that the engine or radiator are starting to collect what I like to call calcium particles. so when the particles break loose they circulate around in the cooling system, when the radiator cap opens to let water out to the recory bottle these particles go out with it, however when the cap closes and tries to seal the radiator back up the particles get stuck under the seal therefor the radiator never pressurizes and continues to let water out filling up the recovery bottlle and then boiling over. I have proved this theory several times (and you can too) by letting the car cool down after a overheating tantrum and removing the radiator cap. Look at the rubber seal and i will bet you find these calcium particles built up on it not letting the cap reseal. I have cleaned the cap and put it back on and driven sometimes 2-3 days without a problem. The reason the temp will go up and down at times is because it deoends on whether or no the coolant has washed all the particles away when it opens and closes. Do a heavy duty and thorough cleaning of the cooling system making sure to get these particles out and you should be fine.