--------------------------------------------------------------------------------

Hey everyone. I just replaced the heater core on my 91 civic and then added all the coolant and turned my car on. She runs great. I checked the hoses going to the heater and out, they are both warm. The heat controls are on hot and yet no warm air is coming out, just really cold air. What could this be?

 

have you checked the heater valve just infront of the firewall to see if its opened up???

 

Yeah I just checked, it is opened up.

 

Put a thermostat in it should be fine then.