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If the pressure switch fails to close due to a blocked flue or failing motor
as a veteran tech knows
Whether you are performing a replacement motor swap or a new installation
The centrifugal design of this HVAC blower wheel provides the necessary mechanical lift to overcome internal resistance within the blower assembly
Lennox 69W55 Pressure Switch THPU32HP7Y If the pressure switch failsThe Lennox 69W55 is a critical two stage pressure switch engineered for precision airflow monitoring in high efficiency gas furnaces. Specifically designed as a Lennox OEM replacement part, this 102737 03 switch features dual set points to support staged heating operations: a high pressure set point of 0. 55" W. C. and a low pressure set point of 0. 20" W. C.. As a furnace safety switch, it functions by verifying that the inducer motor is creating
