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Tuesday, July 14, 2009

2005 Chevrolet Silverado, Driver's Vent Hot Passenger Vent Cold


Sparky,
This past weekend I received the replacement Blower Motor Resistor for my '05 Chevy Silverado, installed it and now the blower is working fine.  However now the driver's side will only blow hot air (being in 100 degree texas heat I'm not sure if the heater was on or if it was just outside air) it will not blow cool air at all. The passenger's side seems to be working fine.
My assumption is not that the part is bad or that I installed it incorrectly, I would just like some tips on what I should do next.

Thanks for everything

Mike

Hi Mike,

First you need to try a recalibration procedure. Set the controls to high blower and temp to medium. Make sure the key is off. Disconnect the negative battery terminal for at least one minute. Reconnect the cable, start the engine and DO NOT adjust the controls. After about 4 minutes turn the key off for at least thirty seconds and then restart the engine, check the controls for function. If problem is gone calibration worked if it is still there you will more than likely have to replace the driver's side blend air door actuator, pretty easy. Let us know if you need more help.

Sparky

Sparky

The recalibration procedure worked like a charm. Thanks for your help,
the next time I have a problem with my truck I know who i'm gonna ask first.

You're the best!

-Mike

8 comments:

Anonymous said...

my truck blows cold on the driver side and cold on the driver side...
What would you do?

Sparky said...

Well in SC during the summer I would be happy with cold and cold on the driver's side. Could you please reread your comment and clarify your problem?

Anonymous said...

I've had the same problem with my Chevy Silverado '05'. the driver side blower will start to blow hot air when the a/c is on, for no [articular reason. I can get it to blow cool air by pulling over and turning off the truck. When I restart it, a/c works fine on both sides. This happened about 4-5 times last summer and 2 times this summer.

Anonymous said...

I have the same problem with my '05 Silverado. Cold AC will suddenly turn into hot air on both sides at once, and will only reset after turning off the truck and restarting. It seems to be happen at random, and it is very intermittent. Does this still sound like the actuators to you?
I know I need to replace the blower resistor and connector, and would like to fix the hot air problem same time if possible.
Dan in Texas

Sparky said...

It will be actuator related but since both are doing it at the same time I would suspect a poor connection at the junction block at the right end of the dash.

Anonymous said...

I had the same issue on my 09 Silverado; hot driver side/cold passenger side. I used your recalibration procedure and it starting working properly again. Thanks!!

Anonymous said...

Sparky, can you achieve the same by pulling the AC fuse from the box in the engine compartment?

Anonymous said...

The 10 amp fuse for the memory circuit in the HVAC control head, Yes.