What could it be

Old 01-22-20, 07:30 PM
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What could it be

I have a Lennox gas heater. The system doesn''t start many times and the code is the pressure switch. If I unplug the tube between the inducer exhaust motor and pressure switch the inducer motor turns on. I plug the tube back into the nipple on the inducer exhaust motor and the gas ignites and the system produces heat. Is the pressure switch stuck and disconnecting the tube causing it to open?
Old 01-22-20, 08:32 PM
Join Date: Oct 2016
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Clean out the tubing and pressure switch.

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