Silicone insulation can develop microscopic "pinhole" leaks over time

and rooftop air conditioners

including the A19ABC-24C

providing accurate temperature feedback for efficient defrost initiation

it is functionally identical to Lennox 28G3601 and serves as a direct cross-reference for multiple Allied

Fenwal 35-705505-113 Control THPU32HP7Y Silicone insulation can develop microscopicThe Fenwal 35 705505 113 is a microprocessor based Direct Spark Ignition (DSI) control engineered for high precision management of 120V gas fired equipment. Constructed to replace legacy analog systems, this module provides superior timing accuracy (typically 5%) for critical combustion sequences. This specific 35 70 series configuration features a 15 second pre purge to clear the combustion chamber of residual gases before ignition and a 7 second