Heater Control unit rebuild help
Thread Starter
Racer
Joined: Apr 2013
Posts: 419
Likes: 15
Heater Control unit rebuild help
A couple years ago I rebuilt my Heater Control unit and yesterday reinstalled it back into the car. Once I finally got it in place. Both dials are set at OFF and I started up the engine. Something must be wrong with my rebuild of the Heater Control unit because the blower fan is running while both dial switches are set to OFF. I wasn’t able to turn off the fan until I set the left dial to the VENT position, then the fan ceased to spin. Does anyone know why? I suspect it’s in my 2 year old rebuild of the heater control unit but I’ve got no idea where to begin diagnosing this issue…. Help!
Joe in New Hampshire
Joe in New Hampshire
Thread Starter
Racer
Joined: Apr 2013
Posts: 419
Likes: 15
Today I figured out the crazy issue with my heater controller unit in my 72 with AC. I found a magazine article on how to rebuild your c3 heater controller unit... 1968-1976 Corvette Heat/AC Control Panel Rebuild | Corvette Magazine | Corvette How To's & Technical Articles
and in the article around steps 13, 14, 15 it tells of how to calibrate 2 mechanical switches which are bolted onto the left side of the controller. Once I did that, bingo! Everything worked perfectly as it should. Now, with both dials set to OFF, once I turn on the key, the fan doesn't run! Just as it should!
and in the article around steps 13, 14, 15 it tells of how to calibrate 2 mechanical switches which are bolted onto the left side of the controller. Once I did that, bingo! Everything worked perfectly as it should. Now, with both dials set to OFF, once I turn on the key, the fan doesn't run! Just as it should!
