Boiler diagnostics and service for the Greater Toronto Area
Boiler heating systems depend on water pressure, circulator pumps, zone controls, expansion tanks, safeties and correct firing sequences. A fault in one component can appear as no heat, short cycling or a pressure problem elsewhere in the system.
We check error history, pumps, relays, thermostat calls, pressure and fill, combustion and venting as appropriate. We diagnose the full heating circuit before recommending parts.
Many residential hydronic boilers operate near 12–15 PSI cold, but the required pressure depends on building height and system design.