Lennox 33W19 Pressure Switch R-22 Maintenance-Free Operation: No lubrication or

Maintenance-Free Operation: No lubrication or periodic maintenance required after initial installation

This assembly features a robust thermopile and thermocouple configuration designed to maintain a consistent millivolt signal to the gas control valve

and all necessary o-rings for the stem

0 microamp minimum flame rectification signal to prevent nuisance shutdowns and ensure safe operation

making them the standard choice for low-level cutoff and pump-dry protection

Lennox 33W19 Pressure Switch R-22 Maintenance-Free Operation: No lubrication orThe Lennox 33W19 Pressure Switch is a high precision, 2 stage dual pressure switch engineered for critical safety monitoring in gas furnaces and air handling units. This OEM component (part number 101599 03) features two independent, factory calibrated set points to ensure the inducer motor is moving the correct volume of air for safe combustion. The high stage set point is 1. 37" W. C. while the low stage set point is 0. 30" W. C., providing accurate