Replacing the faulty unit with this 383-500-040 kit often clears the lockout

the kit provides the necessary plunger

How do I test the switching logic during commissioning

Check the model number on your existing air handler or evaporator coil

Conbraco 20-104-00 Gauge 323080-701 Replacing the faulty unit withThe Conbraco 20 104 00 Gauge is an industry standard liquid level sight gauge designed for reliable fluid verification in commercial and industrial boiler systems. Engineered with a rough bronze body for superior corrosion resistance, this water gauge set features 1 2" NPT male connections that ensure a secure, leak free integration into existing steam and hydronic headers. The assembly includes a 5 8" OD x 12" length standard glass tube, providing