heater woes
Thread Starter
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Fleet Mechanic
Joined: Nov 2007
Posts: 1,757
Likes: 29
From: Northeast Nebraska
well, it blows sometimes and doesn't others, it will get warm if the selector valve is set just right but as soon as i mess w/ it to try for, say, defrost or something, it'll never go back to heat
Post Fiend
Joined: Dec 2007
Posts: 8,521
Likes: 16
From: Lost
Heater only, or does it have A/C?
The heater control on my 1980 is messed up, and it will not change from heat to defrost. The actual control lever is behind the glovebox, and I simply open the glovebox, and operate the lever to select which function I need, be it heat, defrost or off (for the summer). My truck was an early 80, with dealer added A/C.
For the hot/cold side, the control lever is under the hood.
Note: this is for non-A/C equipped trucks, factory A/C is drasticly different.
The heater control on my 1980 is messed up, and it will not change from heat to defrost. The actual control lever is behind the glovebox, and I simply open the glovebox, and operate the lever to select which function I need, be it heat, defrost or off (for the summer). My truck was an early 80, with dealer added A/C.
For the hot/cold side, the control lever is under the hood.
Note: this is for non-A/C equipped trucks, factory A/C is drasticly different.
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Fleet Mechanic
Joined: Nov 2007
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From: Northeast Nebraska
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Posting Guru
Joined: Jun 2004
Posts: 1,635
Likes: 0
From: Niceville, FL.
Not to difficult to change the control--if you can find one. NAPA used to sell
them for some vehicles, I bought one for a Mopar once. I found a good one on a junker. LMC truck might have them.
them for some vehicles, I bought one for a Mopar once. I found a good one on a junker. LMC truck might have them.
Moderator
Joined: Jan 2001
Posts: 56,949
Likes: 2,718
From: Virginia
Mine had A/C, and it was giving me problems, and I found a rotted plastic line that ran underneath the glove box. I am not sure what it did, but it seemed to fix it. Also make sure your line in the engine compartment is in good shape, and also the one that goes to the vacuum resevoir can. The line that runs by the fan area supplies vaccum for the whole system.
