The unit features a proof pressure of 12" WC and a burst pressure rating of 27

a cracked or worn hot surface ignitor is the likely culprit

Application Accuracy: Factory-set stop at 35°F and a fixed 5°F differential ensure a tight response to low-temperature excursions

For optimal performance and to prevent debris accumulation in the pilot assembly

Proper installation requires brazing with wet rags to protect internal seals and verifying 24VAC signal from the defrost board to the O-terminal

York S1-025-21785-001 Heater Els PW 29614 The unit features a proofThe York S1 025 21785 001 is a high performance 10KW 240V electric heater configured as a 3 element heat kit for professional HVACR applications. This OEM York replacement part is engineered to provide supplemental or emergency heat for residential and light commercial air handlers. Operating on a 240V single phase supply, the three element design ensures balanced heat distribution and rapid thermal response during low ambient conditions. As a veteran