Heat only on AC cab

[Tranz Zam]

So my new cab is was a factory air truck, but I want to go with heat only. I know the easiest way out would be to purchase one of those fiberglass AC delete panels, but I figured I'd try something else first.

I found an old thread on another forum, where the guy was able to bolt up his factory heat only box to the firewall. He had to cut a new hole in the firewall for the blower motor to be able to blow on the heater core, but other than that it seems like it worked flawlessly.

http://forum.73-87chevytrucks.com/smforum/index.php/topic,21690.15.html

Quick question, can I keep the factory AC components under the dash, or do you have to switch all that with the factory heat only setup? I skimmed through the thread quickly, and didn't find an answer. It looks like he kept the factory AC dash components, but idk?

Thanks guys!

 

[74 Shortbed]

I believe you have to change everything to heat only, heat only use cable controls and A/C uses vacuum, you'll have to make a plate to cover the A/C hole in the firewall too.

 

[1973c10]

Hey there


They make a ac delete box or you can make your own

http://www.classicindustries.com/product/truck/parts/14446.html


when did mine I just took it all out and
rebuilt the firewall to a non AC firewall I made the new firewall it out of
18 gage steel sheet
Here is a before and after pics sorry there not that great

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[74 Shortbed]

My truck was heat only and someone added the A/C, so now I have to make a plate to cover half the hole, shouldn't be noticeable when it's done though.

 

[1973c10]

You will also need a inside and outside non AC heater box
and non ac heater control they come in 2 cable or 3 cable design
when I did my conversion I found a truck at the wrecking yard
and just grabbed everything it was like $100

 

[Bacon]

Maybe this will give you ideas. Heater only box with a hole cut and pipe welded. Was easy to set up

 

[Tranz Zam]

Interesting setups.

I think I might bite the bullet and buy the fiberglass delete panel.

I was running my cab harness today, and realized that the cab harness I have is for a non ac setup, but the cab is an ac cab. I assume I can remove the ac part of the harness and use the non ac wiring?

I'll figure it out either way I guess. I need heat!