HVAC CONTROL UNIT - C5 - Blanked Out ?
Thread Starter
Intermediate
Joined: Jan 2021
Posts: 42
Likes: 2
From: Fresno CA
HVAC CONTROL UNIT - C5 - Blanked Out ?
The entire heating and ac control unit just went blank as if it had no power but was still working and then display lights came back on a few minutes later what's the fix for this?
Melting Slicks
Joined: Sep 2008
Posts: 3,142
Likes: 802
From: Espanola New Mexico
Most likely bad solder joints on the resistors on the printed circuit board. Usual fix is to pull hvac unit out and retouch the resistors with a soldering iron and adding a little solder where the resistor contacts the board.
