What causes these ignitors to fail repeatedly

polyethylene tubing via 3/16 inch nipples

Wide Operating Range: Adjustable 5-28 inch water column range covers a broad spectrum of commercial burner and boiler specifications

Internal check valves offer low pressure drop while maintaining 40-micron filtration efficiency

Field Flexibility: Dual-orifice support allows for rapid conversion between liquid propane and natural gas applications

Fenwal 35-663904-113 Ignition Module Refrigerant What causes these ignitors toThe Fenwal 35 663904 113 Ignition Module is a microprocessor based 24VAC Hot Surface Ignition (HSI) control designed for precise timing and consistent performance in commercial and residential gas fired appliances. This Fenwal 35 66 series module integrates a built in inducer blower relay and pressure switch monitoring, streamlining the combustion sequence by managing the blower and verifying airflow before the trial for ignition (TFI) begins. With a