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Lennox G40UH-60D-135 Air Pressure Switch
The function of the switch is to determine whether the main blower is actually running. The vast majority of pressure switches made today have a manual reset feature, which, of course, means that it would have to be reset by hand before the HVAC system will continue. This switch is a very critical piece of the collection of safety devices in place to keep you safe from injury or explosions.
Common Indications of a Bad Pressure Switch
- Furnace will not operate.
- Bad voltage running through the pressure switch.
- The set temp is almost never attained.
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