1998 Cadillac STS won't heat the inside
#1
1998 Cadillac STS won't heat the inside
The car warms up correctly however cold air comes out of the inside heater. I have changed the thermosat and watched it work when it heats the engine then backs off. It does seem to work alittle at times but doesn't come out hot at all. All suggestions are welcomed.
#6
RE: 1998 Cadillac STS won't heat the inside
Good chance it is. Disconnect heater hoses remember which is which, take garden hose press it to the cold hose side of heater core and try to force out the gunk thats blocking it, if gunk comes out after a few minutes and water is flowing strong. Turn hose towards heater hose to clear gunk that may be in pipe going to core. Then flush cooling system. If no gunk comes out you need heater core, and you will still need to flush cooling system either way.
#7
RE: 1998 Cadillac STS won't heat the inside
I just had the sameproblem in late October/ 08. Replaced the heater core. Heater core got clogged due to wrong anti-freeze being used in the car. The shop that replaced the water pump told me I didn't need that GM anti-freeze. They were wrong.
Don't know if you have the same situation.
Don't know if you have the same situation.
Thread
Thread Starter
Forum
Replies
Last Post