As a direct-fit CNT7541 replacement

While the blue glow may remain visible beyond 12 months

potentially leads to heat exchanger damage or unsafe operating conditions

Electrical Isolation: Protects the integrated HVAC control board by separating sensitive signals from line voltage loads

Johnson Controls A19AUC-2 Temperature Control Els PW 17895 As a direct-fit CNT7541 replacementThe Johnson Controls A19AUC 2 is a heavy duty mechanical temperature control engineered for precision in hazardous location environments. This explosion proof thermostat (equivalent to the A19AUC 2C) is rated for Class I, Group D (NEMA 7) and Class II, Groups E, F, and G (NEMA 9), making it the standard for safety in grain elevators, chemical plants, and paint spray booths. It operates on a 20 to 80 degree F setpoint range with a tight 3. 5 degree F