heat problem

[jvmrn]

I have a 93 grand am 3.3L ..........my car gets up to normal operating temp. and my heat only blows a little warm on the driver side, on the passenger side it blows cold. even on the driver side the heat is not as hot as it should be. i had the thermostat changed , the system flushed and filled. there is no leaks ,, the coolant level is right up.
any ideas?

[Ridenour]

hmmm... bad heater core?

[Chazman]

This is a quote from Swalt in a different post.


"If your thermostat is ok and your car is not overheating or running too cold, it is a damper door. Pull the glove box out and the passenger side kick plate at the bottom of the dash. Follow the cables coming from your heater controls. One of them has popped off. You will find a rectangular plastic piece in-line of the cable that attaches to the one of the diverter doors that directs heat. I had a similar problem years ago. Cost me one hour labour at the dealer for a two minute fix.....it took them that long to diagnose. By the way, it is the cable that connects to the hot and cold dial...yours came off and is stuck in the cold mode."

[swalt]

If this happened after your flush and fill, I suspect you still have air in the system which is preventing flow from circulating through the heater core.

[jvmrn]

Originally Posted by swalt

If this happened after your flush and fill, I suspect you still have air in the system which is preventing flow from circulating through the heater core.

unfortunetly it didnt happen after that ......it happened before....im stuck i have no idea whats wrong

[swalt]

Three areas to look to then.

1) Air in the system (but sounds like you have taken care of that)
2) Diverter door is disconnected. Follow the cable from the hot/cold knob and see if it is still attached.
3) Your heater core is plugged. Pull off both hoses, put a garden hose to the core and see if it is flowing ok.

If you have never done a heater core on the 93, you are due. Even with a flush and fill, they may not clear an obstructed core. Usually they need to be backflushed.

[jvmrn]

thanks alot i will try what you say