Carrier HH18HA120 Temp Switch 319825-402 The Watts 0342692 (Model M335M2)

The Watts 0342692 (Model M335M2) is a heavy-duty 3/4" boiler pressure relief valve engineered for hydronic heating systems and low-pressure steam applications

ensuring safety and efficiency in combustion safety systems and furnace diagnostic assemblies

" allowing contractors to reuse existing high-efficiency motors or match with a new Carrier 50HJ motor based on specific voltage and phase requirements

25" protective enclosure prevents mechanical damage from forklifts

this OEM part is engineered to detect abnormal high-temperature conditions—specifically flame rollout—and immediately break the electrical circuit to shut down the gas valve

Carrier HH18HA120 Temp Switch 319825-402 The Watts 0342692 (Model M335M2)The Carrier HH18HA120 Temp Switch is a critical safety component designed for precise thermal regulation within residential and light commercial HVAC systems. Engineer specified with an operating temperature range of 120 30F, this OEM Carrier replacement part functions as a high limit safety or operating control to prevent equipment damage during abnormal thermal conditions. Built for durability in high cycle environments, it provides reliable HVAC