Most trips are caused by airflow restrictions

White-Rodgers F115-0087 Lead Assembly For 21D18-14

A defective starter relay will often show an open circuit or infinite resistance

If the switch is open at room temperature and refuses to reset via the manual button

The 381-356-577 is engineered to withstand the demanding environment of modern hydronic loops

Reznor 97534 Pilot Assembly Els PW 17895 Most trips are caused byThe Reznor 97534 Pilot Assembly is a high performance natural gas pilot burner and flame sensor kit engineered for industrial and commercial heating equipment. Built around the Baso Q90FF 1 specification, this assembly is a critical HVAC replacement part for Reznor unit heaters and duct furnaces requiring precise ignition. It features a robust 18 inch sensor lead cable and a . 032" pilot orifice to ensure consistent flame detection and furnace