Hydrotherm 04-1335 Thermocouple R-407C the MARS 86390 uses a

the MARS 86390 uses a mechanical set-screw design

meaning the circuit is designed to open at 150°F on a temperature rise and automatically reset when the temperature drops by 30°F (closing at 120°F)

including AMN1630 models

ensuring a seamless fit and immediate restoration of system safety protocols

and 5H80 models

Hydrotherm 04-1335 Thermocouple R-407C the MARS 86390 uses aThe Hydrotherm 04 1335 Thermocouple is a critical safety and operational component designed for high performance gas fired boilers and commercial water heaters. This Type K thermocouple is engineered to generate a precise millivolt signal in response to pilot flame heat, ensuring the gas valve remains energized during active combustion cycles. Built with a shielded cable and a ruggedized probe, the 04 1335 provides the structural integrity required