MARS 39220 Limit Switch while the common lead is

while the common lead is white with a yellow stripe

including the D15

its 277V rating and heavy-duty contacts allow it to switch various high-voltage resistive and inductive loads within its amperage specifications

error-free wiring by service technicians

Combustion Safety: Provides a robust barrier against flue gas leakage

MARS 39220 Limit Switch while the common lead isThe MARS 39220 Limit Switch is a versatile, high reliability solution for field service technicians needing an exact or universal replacement for furnace high limit applications. This adjustable snap disc thermostat features a temperature range of 135F to 175F with a fixed 40F differential, allowing for precise calibration to match specific internal plenum requirements. Designed as an open on rise safety device, the 39220 ensures the heating circuit