My 05 MC has no heat...

Ok, so some back ground.....For the last week and a half or so after the car has warmed up to it's normal operating temp I would have no heat. If I were to move the temp levers up and down I would get heat.

Now, some more back ground (I posted this a few days ago with no help)......I changed the air filter and after loosening up the clamps with a screwdriver, I put it in a hole for safe keeping..........well, not so safe keeping as I shut the hood and ran the screwdriver through the radiator.

I just finished changing the radiator, put everything back together and filled it with anti-freeze/water and ran it. Temp shot up to almost the red zone. Hoses weren't hot or anything.

So........is it possible the thermostat is sticking? Or maybe I missed connecting something when putting the radiator back? I double and triple checked everything and didn't see anything.

One final question............is the thermostat under the air breather connection?

Ok, one more question, if so, how is it changed?

Thanks.

 

what engine?

 

Sorry, thought I put that in the post......... I've got the 3400.