Hi, my chevy luminas heat is not working. I have bled the coolant system. Does anyone know what it could be?

 

warm up the engine to normal operating temperature...the thermostat should open and the upper rad hose should feel hot. find the 2 heater core hoses that go into the passenger compartment thru the firewall...are these hoses hot? if they are the problem may be a blend door problem. inside the hvac case...there is a door that moves to adjust the temp from cold to hot. the door should move as you adjust the temperature control.

 

I'ts a &^^$$ to replace thermostat on these things. I'd recommend with the engine cold pull it, if it's open, it's replacement time. These are designed to fail open, my $ is the tstat is failed.

 

You can also with cold engine NOT feel flow through the top radiator hose.

 

I just replaced the thermostat still no heat i checked it with a heat gun both are ice cold

 

Double check the top radiator hose to ensure the thermostat is working, I know you replaced it, but . The one thing I've not had to deal with on my 96 lumina is the heater control valve, but it looks like this is your issue.

 

is there a heater control valve or is it the blend door?

 

It may not have a valve, the blend door actuator is under the dash center.