nazpaz wrote:
STBRetired wrote:
Before you install the board, you might want to make sure that the white and orange wires are not shorted together somewhere between the switches and the control board.
Just put a meter on them and make sure there's no continuity?
Yes, just disconnect both ends and put a meter between them to check for continuity. When I worked HVAC, I saw that in a S&B. Someone hung a picture and put the nail into the thermostat wire. Furnace ran continuously. Could be possible abrasion somewhere in the run of the wiring. Best to check before an unnecessary board replacement.
