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73-87 Chevy _ GMC Trucks => Interior & Equipment => Heating, Ventilation & Air Conditioning (HVAC) => Topic started by: comp on May 31, 2008, 06:01:07 PM

Title: a/c - heater control
Post by: comp on May 31, 2008, 06:01:07 PM

is there a tech artical on them,,looked and couldn't find

Title: Re: a/c - heater control
Post by: comp on May 31, 2008, 09:23:11 PM

OK has anybody worked on theirs ?????

Title: Re: a/c - heater control
Post by: choptop on May 31, 2008, 10:36:33 PM

I haven't had trouble with any. What problems are you having, and I bet one of the guys here will help, but we need to know the symptoms before we can know the cure.

Title: Re: a/c - heater control
Post by: comp on May 31, 2008, 10:59:02 PM

well for one changing fan speeds with the key on will blow a fuse sometimes,, and when you change the controls they don't always work

Title: Re: a/c - heater control
Post by: okuma on June 01, 2008, 12:36:23 AM

start  by changing out thr complete ac/heater panel on your dash....
     this panel contains electric and vacum components.

Title: Re: a/c - heater control
Post by: comp on June 01, 2008, 07:15:16 AM

Quote from: okuma on June 01, 2008, 12:36:23 AM

start  by changing out thr complete ac/heater panel on your dash....
     this panel contains electric and vacum components.

 i have three trucks and would like to save the $$$ and fix them

Title: Re: a/c - heater control
Post by: okuma on June 01, 2008, 12:40:57 PM

i meant only the controls on thr dash....

if you have 3 trucks swap them from one to another one..

Title: Re: a/c - heater control
Post by: comp on June 01, 2008, 01:55:07 PM

Quote from: okuma on June 01, 2008, 12:40:57 PM

i meant only the controls on thr dash....

if you have 3 trucks swap them from one to another one..

all three have problems ,,,,, >:(

Title: Re: a/c - heater control
Post by: Captkaos on June 02, 2008, 01:05:46 PM

Blower fuses: I would check the wiring to the switch.  Is there an after market radio in the truck?
Controls:  Vacuum leak, or lack of.

Title: Re: a/c - heater control
Post by: comp on June 02, 2008, 08:42:06 PM

Quote from: Captkaos on June 02, 2008, 01:05:46 PM

Blower fuses: I would check the wiring to the switch.  Is there an after market radio in the truck?
Controls:  Vacuum leak, or lack of.

 no radios,,, doesn't seem to be any vac. leaks,(sprayed with starting fluid and no change)

Title: Re: a/c - heater control
Post by: comp on June 18, 2008, 10:55:50 PM

 bump ?

Title: Re: a/c - heater control
Post by: Captkaos on June 19, 2008, 12:47:29 PM

I don't know what to tell you on the fan other than start putting a meter to it to find where the load is coming from.
As for the controls, can you tell if anything is actually moving?

Title: Re: a/c - heater control
Post by: comp on June 19, 2008, 12:52:41 PM

Quote from: Captkaos on June 19, 2008, 12:47:29 PM

I don't know what to tell you on the fan other than start putting a meter to it to find where the load is coming from.
As for the controls, can you tell if anything is actually moving?

 yes all is free ,,one is tight but i think that one is the cable  ???