Replacing thermostat for gas furnace only
Have a 2003 Fourwinds with the old style wall thermostat with the hard on/off switch and temp adjustment below with just bars (no numbers). On several occasions, the furnace will start and heat up cam...
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While looking at the igniter. Check the connection on furnace control board. I needed to use some contact cleaner on the board where a wire connector attaches to the board.
