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The EF33CW189 is versatile
While specifically a pressure switch code
Using two standard screws can distort the baseplate and negatively impact the factory calibration of the dual bimetal sensors
replacing the 1065750 circuit board restores factory-spec timing and prevents premature high-limit trips
To diagnose a restricted liquid line
Laars Heating Systems R0385100 Gas Valve 323269-701 The EF33CW189 is versatileThe Laars Heating Systems R0385100 Gas Valve is a critical replacement component engineered for precision fuel regulation in residential and commercial hydronic boilers. Designed for natural gas (NAT) systems, this single stage valve operates on a 24V AC control circuit and is factory set for a 4" WC (Water Column) manifold pressure. Professionals will recognize its integration as a 1 stage spark ignition gas valve, making it compatible with a wide
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