This HVAC control relay is a direct OEM fit for Berko CUH900 series heaters and various QMark unit heaters

the relay has effectively locked out the circuit due to a detected fault

spark electrodes like the 17J57 should be inspected for physical cracks in the insulator and proper electrical continuity to the terminal tip to ensure a high-voltage path exists

The Amana-Goodman 20162903 Limit Switch is a critical safety component designed for precise thermal monitoring in high-efficiency furnaces and package units

Amana-Goodman B1256554 Heat Sequencer Els PW 17895 This HVAC control relay isThe Amana Goodman B1256554 Heat Sequencer is a critical multi stack control engineered for 20kW electric heat kits in Goodman, Amana, and Janitrol air handlers. Designed to manage the staggered activation of up to four heating elements, this OEM component prevents high amperage inrush that can trip breakers or damage sensitive electronic controls. This sequencer features a 24V control circuit (bottom terminals) used to actuate the bimetal strip, which