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this is a dedicated water heater relief valve designed for domestic hot water storage tanks
preventing heat exchanger damage and hazardous operating conditions
The 120VAC coil operates efficiently at 20
which can otherwise lead to pressure drops and compromised boiler safety protocols
protecting the start relay from premature failure
Carrier HH12ZB200 Limit Switch this is a dedicated waterThe Carrier HH12ZB200 Limit Switch is a critical OEM replacement part engineered for precise thermal protection in residential and light commercial furnaces. This auto reset limit switch features a 3 inch insertion depth and is factory calibrated for an L200 40 configuration, meaning it opens on a temperature rise at 200F and automatically closes once the system cools to 160F. As a furnace high limit thermostat, it prevents internal heat exchanger