If your heater is short-cycling or the control board flashes a code indicating a limit trip

the Maxitrol M511-1/2 is a specialized modulating gas valve designed for direct fired burners

Universal Compatibility: The multi-voltage actuator (24-240V) simplifies stock and installation requirements for contractors working across different site power standards

Direct OEM Compatibility: Replaces obsolete part 9004816105

it is recommended to install the valve with the actuator in a vertical or horizontal position

Resideo ZD10X10TZ Damper 320788-702 If your heater is short-cyclingThe Resideo ZD10X10TZ is a professional grade 10x10 rectangular zone damper engineered for high performance climate control in residential and light commercial HVAC systems. This parallel blade zone damper features a heavy duty extruded aluminum frame and blades, ensuring a rigid structure that resists bowing under high static pressure. Operating on a standard 24Vac synchronous motor, the unit utilizes a power closed spring return open logic,