The SPDT contact configuration allows you to wire the fan to the cooling side of the switch

or incorrect discharge air temperature readings that do not match manual probe measurements

ideal for diverse cooling and heating applications

This replacement flame sensor is a standard stock item for service trucks

Use a multimeter to check for 24V AC at the bottom heater terminals

MARS 50327 Transformer 320788-704 The SPDT contact configuration allowsThe MARS 50327 Transformer is a heavy duty 50VA control transformer engineered for versatile voltage step down in commercial and residential HVACR systems. This multi tap primary unit handles 120 208 240 480V input, providing a consistent 24V secondary output to power contactors, relays, and solid state boards. Designed with NEMA Class II construction, it features an open frame design with a manual reset circuit breaker to protect the secondary