This OEM-spec replacement part is specifically engineered for Qmark and Marley heating systems

Remote Sensing: The 118-inch armored capillary allows for sensor placement in tight headers or high-heat zones while keeping the switch housing accessible

Adjustable Timing: Field-adjustable speed range of 80 to 800 seconds for customized control loop tuning

Key Benefits OEM Precision: Specifically engineered for Bard wall-mount units to guarantee exact pin-out and terminal alignment

or the burner failing to ignite (locking out) despite receiving power

Belimo TFLB24 Actuator 328140-751 This OEM-spec replacement part isThe Belimo TFLB24 is a spring return damper actuator designed for reliable fail safe operation in HVAC systems. Operating on 24V AC DC, this actuator provides 22 in lb torque, making it an ideal choice for smaller dampers and air handling units requiring dependable shut off during power loss. The brushless DC motor utilizes microprocessor control to ensure precise timing and consistent performance without the maintenance associated with traditional