Forum Discussion
bob_nestor
Jan 25, 2023Explorer III
ronharmless wrote:
If the fan only can come on when the vent cover is open, then there is a switch in the vent cover. Use a volt meter and check the vent cover switch. You can also jump/bypass the switch to see if it is malfunctioning. You can jump the 0 - 3 switch also to see if it is malfunctioning.
The switch is just a plunger and you can try tugging on the plunger to see if the fan comes on. When the cover closes it pushes the plunger down which disables the power to the fan. The plunger switch tends to get corroded or stuck with gunk, especially when camped near the seashore. If it is the plunger, a little WD-40 will clean it up and solve the problems.
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