the board's internal relay or transformer has likely failed

3-inch diameter motor features Class B insulation

ensuring no-splice installation and perfect fitment within the thermowell

This Apollo 19 series valve is factory-set at 40 psig

common in legacy York chillers and large commercial air handlers

Heil Quaker ICP 522559 Rollout Switch 322057-301 the board's internal relay orThe Heil Quaker ICP 522559 Rollout Switch is a critical safety component designed for International Comfort Products (ICP) furnace systems. This genuine OEM rollout limit switch is engineered to detect burner flame rollout or excessive heat conditions in the combustion chamber, providing essential thermal protection. Operating on a Single Pole Single Throw (SPST) circuit, the 522559 is calibrated with a 300F open setpoint to immediately interrupt the