Berko 4520-2048-000 Limit Switch and 51 boiler controls

and 51 boiler controls

the coil is likely open and requires replacement

Can I use this orifice in place of a TXV

The Carrier P291-4054RS is a heavy-duty

Berko 4520-2048-000 Limit Switch and 51 boiler controlsThe Berko 4520 2048 000 is an OEM 135F CO Auto Limit Switch designed for high performance thermal regulation in Marley Engineered Products and QMark 900 Series B heating systems. This 2 pole limit switch operates with an automatic reset mechanism, functioning as a critical safety component that opens on temperature rise to prevent overheating. Engineered for HVACR technical specifications, it features a single pole single throw (SPST) switch action,