hi everyone my car has been overheating for some time now I replaced the water pump the thermostat is about six months old and the fan kicks on when its supposed to so i have no idea now but i have a new thermostat and a new temp sensor that im going to put on today or tomorrow but my main ? for today was is the ac supposed to trip even when the ac is not on i was checking the car to make sure my fan came on and i noticed that the ac compresor kept kicking on about every thirty seconds only for a second but im pretty sure its not supposed to is it? and also my heat doesnt work properly it takes forever to heat up even after the engine has reached closed loop any ideas. All help is greatly appreciated Thanks

 

Since you put a new water pump on, I would say you have air in your cooling system. I am not sure on your model of Mustang, but most have a bleed valve on top there some place where you can bleed the air out. If the thermostat is installed right side up, and it is not bad, then try bleeding the air out of the cooling system.

The a/c compressor is cycling cause you must have it set to defrost on the heating control. That is another problem and nothing to do with the cooling issue. Cycling on and off may mean it is low on freon. Good luck!

LARRY

 

I have a 99 aniversary 3.8 and im going to check for that bleed valve now and replace the thermostat. my dad put in this one so i dont know if its in right. let you know in a little bit.

 

I wouldn't buy a stant thermostat, they suck IMO, I've used mr gasket or OEM motocraft stats with no problem.

 

I havent got to look at it yet everyones been bothering me with other problems but it needed some water and now it doesnt overheat but ive put water in it before and it seems like it just pushes it out in about a week it will start overheating again the stat i got for it is motorcraft thats the only thing i use in my fords but ima bleed the air as soon as i get a chance its raining right now

 

If you keep losing water and you don't know why or how, that isn't a good thing. I hope that isn't the case for you, keep us informed.