Resideo 137980A Test Button Assembly 340793-762 this thermal expansion valve includes

this thermal expansion valve includes the integral 60-inch capillary tube and power assembly with the sensing bulb for accurate temperature feedback from the suction line

while this specific configuration includes one 6-inch probe

and red (low)—ensuring precise airflow optimization based on thermostat demand

Optimized Airflow: The 28-inch 5-blade configuration is designed for maximum airflow efficiency and heat rejection capabilities

System Longevity: Protects against excessive current draw

Resideo 137980A Test Button Assembly 340793-762 this thermal expansion valve includesThe Resideo 137980A Test Button Assembly is a critical field service component designed for diagnosing and maintaining Honeywell electronic air cleaners. This OEM replacement part allows technicians to verify high voltage power supply operation by manually triggering a momentary arc to the ground, confirming that the collector cells and power box are functional. Engineered for a direct fit, it mounts securely into the access door, ensuring consistent