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Lennox G40DF-48C-110 Air Pressure Switch
The function of the air pressure switch is to see if the blower fan is blowing air. This switch is one of the critical devices designed to keep you safe. The vast majority of pressure switches made today are programmed with a manual reset, which forces the system to be reset physically before the system will continue its normal operation.
Signs to Look for when your Air Pressure Switch is About to Fail
- Wrong volt range being read.
- HVAC system refuses to run correctly.
- The correct temperature indoors is hardly ever reached.
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