a rollout switch must be a manual reset type to ensure the system is inspected by a professional before being restarted after a high-heat event

ensuring the automatic reset function restores system operation once internal temperatures return to a safe operating range

this component ensures precise pilot ignition and flame stability in residential and light commercial boilers and furnaces

What causes this part to fail

Trane CNT4368 Control Board Els PW 17895 a rollout switch must beFor field techs managing freeze up issues on residential heat pumps, the Trane CNT4368 Defrost Control Board is the current OEM standard for maintaining system efficiency during low ambient operation. As a direct Trane CNT1129 replacement board, this microprocessor based control manages the critical timing and temperature parameters required to clear frost from the outdoor coil. It effectively supersedes older iterations including CNT1050, CNT1510,