Question about Cars & Trucks
Air doors work properly however the front and the rear blower motor only work on high. The rear blower motor also only works on high independent from where it is controlled from.
I had the same problem, I changed the resistor that is located behind the glove compartment and it is all good now. That resistor doesn't look like a resistor when you look at it. To reconise this item, there are two connector attached to it, the one from the blower motor on which there is a green wire and a black wire. The other connector attached to the same resistor consist of 4 wires of diff colors.
Posted on Aug 25, 2009
I'm just a regular diy'er, no training. Had same problem, 2001 Suburban, front blew cool air when heating, rear heat warmed up nicely. After reading other posts on other boards, took off the the heater hose clamps (make sure you remember which is which) at the firewall. With low pressure garden hose flushed left inlet/outlet first till I got good flow, then the right side, and back to left. Reattached hoses, started and tested. Heat blows just fine. I can't think of anything that could be damaged by this, but check with someone who know something first before trying it on your vehicle, but it worked for me. So far so good.
Posted on Oct 25, 2009
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