help furnace again
I replaced the board I jumped the sail switch got fan running it fired up and ran once now all I get is the fan to run then it quits???
Forum Discussion
REPLACE the sail switch. Newer model furnace boards will not function if the sail switch bleeds 12 volt current or sticks. Jumping the sail switch is not the way to diag on newer furnaces. The control boards can see if the sail switch is OPEN or bleeds current at initial start up. From your previous posts, you have replaced at least 2 circuit boards and they rarely fail. Doug
To Jump the sail switch, you have to close the switch AFTER the fan has run for a few seconds.
To Jump the sail switch, you have to close the switch AFTER the fan has run for a few seconds.
