High temperature limit switch and temperature controller fails to shut off gas supply to boiler
April 3, 2020
Boiler, PV and Refrigeration
Reference Number:
II-1000791-2020 (#16966)
Location: Chilliwack
Regulated industry sector: Boiler, Pressure Vessel & Refrigeration
Incident overview
The high temperature limit switch and temperature controller of a boiler located in the mechanical room of an apartment building failed to shut off the gas supply to boiler, causing a release of water at high temperatures through the safety relief valve.