Heat gets hot then cold.

[mastermind6288]

:roll:I have a 2001 explorer limited edition that has a heat issue. It will get hot and then cold but for the most part it stays cold. I topped off the coolant and changed the thermostat. I dont get it, Does anybody know whats going on? Any help would be much appreciated. Help!!!!!!!!!! Its freezing out there.

Thanks

 

[BrianDye]

Hm...could possibly be a bad water pump

 

[mastermind6288]

Im sorry i should have been more specific the motor isnt running hot at all. The heat inside is acting strange.

 

[BrianDye]

Hm if the engines not getting up to temp, you could have possibly gotten a bad thermostat, stuck open, or not installed right...

 

[BrooklynBay]

Welcome to this forum! I've moved your thread into the A/C & heater section. It's possible that the thermostat might be installed upside down.

 

[BrianDye]

Welcome to this forum! I've moved your thread into the A/C & heater section. It's possible that the thermostat might be installed upside down.

Ive heard that too, whats the difference if its upside down or not? I think when I put the new one in my Taurus I put it in wrong because my engine still wouldnt come up to temp or get heat or anything, but when I did it on my expo, I put it in the exact same way I took the old one out, and it fixed the problem

 

[BrooklynBay]

The flow will be against the spring instead of the same direction.

 

[BrianDye]

Oh, I knew that, thought you meant like having it in the right way, but turned or something, if that makes sense?

Heres a little paint sketch of what I mean (The springs are both in the same direction, but theyre just turned differently)

 

[BrooklynBay]

http://auto.howstuffworks.com/question248.htm
http://auto.howstuffworks.com/cooling-system8.htm