Heater problem
1991 Chevy Corsica 4 cyl Two Wheel Drive Automatic
heater will blow air but no heat, new theremo. Back flushed, no leaks inside, please help!
thank you
Sunday, October 19th, 2008 AT 11:26 AM
1 Reply
JACOBANDNICKOLAS
MECHANIC
109,896 POSTS
Hi:
It sounds like there is a problem with the heater core. There are two hoses that run to the firewall under the hood. One is an inlet, the other is an outlet. With the car running (at operating temp and with the heater on), carefully feel both hoses. Both should be very hot. (Be careful not to get burned. The coolant going through them could exceed 200 degrees.) If one is hot and the other isn't, there must be something plugged in the heater core and it will most likely need replaced.