McDonnell & Miller 309200 Switch R-410A For technicians performing a Lennox

For technicians performing a Lennox furnace repair

Engineered as a direct replacement for P70AA-3

featuring a 3/4" sweat connection

UL 810 safety interrupter effectively isolates the capacitor at the end of its service life to prevent rupture

this model is an automatic reset pressure control

McDonnell & Miller 309200 Switch R-410A For technicians performing a LennoxThe McDonnell & Miller 309200 is an industrial grade 11 MV Millivolt Switch specifically engineered for low water cut off (LWCO) control in steam boiler applications. This millivolt replacement switch is the standard for technicians servicing McDonnell & Miller Series 61, 64, 67, 69, 70, 764, and 767 units. Featuring a Two SPST Auto Reset configuration, the 11 MV provides dual circuit control, allowing contractors to manage both the burner circuit and