If the error is caused by a shifting flame sensor that fails to detect the pilot

high-pressure seal common in Lennox 80MGF and 80UHG series furnaces

5-second operator in place of the 6-second 41637

Field-Proven Reliability: Trusted by contractors for boiler receiver tank applications where consistent proportional feeding is required

It is professional best practice to source a new fiberglass or high-temp gasket for a gas-tight seal upon installation

Siemens Building Technology 188-0034 Thermostat 318423-701 If the error is causedThe Siemens Building Technology 188 0034 is a professional grade unit mounted pneumatic thermostat engineered specifically for technical retrofitting applications. This Retroline replacement for Johnson Controls T 3300 2 provides reliable control for heating and cooling systems in unit ventilators and fan coil units. Utilizing a liquid filled sensing element with a 96 inch capillary and a 3 8 inch diameter remote bulb, it ensures accurate temperature