hey guys, i am having some problems recently with my heater after i changed my exhaust. i don't know if it's gotto do with the aftermarket exhaust or just freezing weather in seattle, WA. heater only works when i step on the car, even my engine temperature is in where it should be. i got 06 with 50k miles, and i do have engine check lights on because i didn't do 02bug just yet if that matters. thanks inadvance.

 

have you flushed your radiator recently? Air in the system can cause this.

 

Moving to UTH

 

I had the same problem when I flushed my radiator. Other then that I would check the coolant level and make sure it is full.