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Lennox XP13-036 Air Pressure Switch
The job of the air pressure switch is to see if the main blower is running. This is part of a small, but important collection of mechanisms designed to keep you safe. Some pressure switches are equipped with a manual reset feature, which makes you reset it by hand in order for the HVAC system to continue running.
Signals that the System Pressure Switch is Going Bad
- Furnace won't ignite the gas.
- The correct temperature indoors is never fully attained.
- Wrong electrical voltage being read.
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