Fenwal 35-665036-111 Control 30067439-890 If the 230-260F limit switch

If the 230-260F limit switch opens

it restores the burner circuit once a safe water level is detected

which then lights the main burner

often cross-referenced with the Honeywell Q354A-1024

this 3/4" NPT unit utilizes a precise conical valve to minimize frictional resistance

Fenwal 35-665036-111 Control 30067439-890 If the 230-260F limit switchThe Fenwal 35 665036 111 is a microprocessor based Hot Surface Ignition (HSI) Control engineered for precise sequencing in gas fired HVAC systems. Designed as a robust 24 VAC solution, this module integrates an on board inducer blower relay to manage combustion airflow before and after the burner cycle. It features a critical 15 second pre purge (15sPP) to clear the combustion chamber and a 4 second Trial For Ignition (TFI) window, ensuring dependable