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If your unit heater is short-cycling or the control board displays a limit trip code
Common Questions How do I adjust the setpoint on the Antunes JD-2-GREY
How do I know if the 89M76 needs replacement
As a veteran-grade HVAC high limit replacement
the 2218-132 is specifically engineered for systems requiring two setpoints or seasonal action changes
McDonnell & Miller 193 Controller 30067439-890 If your unit heater isThe McDonnell & Miller 193 (Part Number 163400) provides heavy duty combination low water cut off and pump control for commercial and industrial steam boilers. Engineered for high pressure systems with a 150 PSI maximum pressure rating, this unit features dual snap acting SPDT switches to ensure precise differential control and reliable burner shut down. The proportional action of the float mechanism maintains tight water level tolerances, preventing
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