or spark igniter must be ordered separately if required

Repeated tripping usually indicates an airflow restriction

This OEM replacement pressure switch features a

Common Questions How do I know if the ECO switch has failed or just tripped

Hydrotherm BM-3324 Door Els PW 17895 or spark igniter must beThe Hydrotherm BM 3324 Insulated Base Door is a critical OEM replacement part engineered specifically for technical compatibility with Hydrotherm heating systems. As an experienced contractor knows, maintaining the thermal integrity of the combustion chamber base is vital for preventing heat bypass and ensuring the boiler door replacement seats correctly against the jacket. This Hydrotherm BM 3324 component features high density insulation designed to