This unit features a 5/8 x 7/8 connection size (ODF) and is designed for seamless brazing into the refrigerant lines of existing Trane and American Standard systems

making it an essential component for condenser fan cycling and defrost termination logic

"HERM" for the compressor

this SPST switch provides critical high-limit protection by interrupting the circuit when system pressures exceed safe operational thresholds

replacing it with a new 29388 control board typically resolves this failure

Heil Quaker ICP 1150886 Board Els PW 17895 This unit features a 5/8The Heil Quaker ICP 1150886 Fan Timer Board is a critical electronic control component designed to regulate the operation of the burner and the circulating fan in oil furnaces. This board is technically identical to the Honeywell ST9103A1028, providing a direct swap replacement for aging or faulty furnace controllers. Engineered for robust performance, it manages the timing sequences for both heating and cooling cycles, featuring a fixed 30 second fan