common in legacy York chillers and large commercial air handlers

the board's internal relay or transformer has likely failed

this HVAC pilot assembly is compatible with a wide range of A

Range: Provides highly accurate monitoring for low-pressure gas manifolds

ensuring it integrates seamlessly with standard low-voltage thermostats and control circuits

Heil Quaker ICP 522559 Rollout Switch 322057-301 common in legacy York chillersThe 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