Quote:
Originally Posted by Mike Leary
I wonder why I've never had the sail switch replaced, what does it do?
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I'm not the Suburban guru, but have learned a few things in the past week. The sail switch (I think also called paddle switch) is in the path of the blower air flow. It needs a certain volume of air passing to mechanically open. It makes sure the blower is pumping enough air flow for the furnace to run properly. If there is not enough air the furnace will not fire.