'97 K1500, 5.7l, automatic, 180k miles
Ok. I've read a few posts and it seems my issues aren't quite addressed.
#1: Fan works in 1 & 4 only
It drains heat through the vent on 2 & 3, but appears normal on 1 & 4.
At first the resistor seemed the culprit, but after further reading, the lowest setting shouldn't operate with a bad
resistor.
#2: Heat only goes to defrost area.
No matter where I turn the switch, the air only goes through the upper vents towards the windshield (defrost).
There is leakage into the other vents, but very little.
I'm wondering if the whole HVAC control module needs to be replaced. Sooo, what are some good diagnostics to perform. Or, is it a common problem to repair.
Ideas?
Thank you!
Ok. I've read a few posts and it seems my issues aren't quite addressed.
#1: Fan works in 1 & 4 only
It drains heat through the vent on 2 & 3, but appears normal on 1 & 4.
At first the resistor seemed the culprit, but after further reading, the lowest setting shouldn't operate with a bad
resistor.
#2: Heat only goes to defrost area.
No matter where I turn the switch, the air only goes through the upper vents towards the windshield (defrost).
There is leakage into the other vents, but very little.
I'm wondering if the whole HVAC control module needs to be replaced. Sooo, what are some good diagnostics to perform. Or, is it a common problem to repair.
Ideas?
Thank you!