Modine 5H0547510021 Orifice 318172-701 the internal contacts have failed

the internal contacts have failed or the switch has not yet cooled to its 120°F reset point

What does the integrated connector offer over standard leads

consolidating your inventory for multiple service calls

verify resistance values against the Weil McLain temperature/resistance chart found in the boiler service manual for diagnosis

What do the flashing LED lights on the board mean

Modine 5H0547510021 Orifice 318172-701 the internal contacts have failedThe Modine 5H0547510021 Orifice is a precision engineered Natural Gas Main Orifice designed for consistent gas flow regulation in commercial and industrial Modine heating units. As a critical component in the burner manifold assembly, this orifice is calibrated to maintain the specific manifold pressure required for efficient combustion and clean flame characteristics. Built from high grade, corrosion resistant brass, it ensures long term reliability