Manufacturer directory
Grant Boiler Fault Codes
Fault-code information for Grant boilers, grouped by verified boiler range. Each entry is linked to its own fault-code page.
Popular boiler ranges
Verified fault-code index
Vortex Pro External
View range- burner lock-out — Vortex Pro External
The Grant Vortex Pro External control panel provides a burner lock-out reset button; this is an oil-burner indication rather than a numeric boiler code.
Read fault code - overheat thermostat trip — Vortex Pro External
The safety overheat thermostat automatically switches the boiler off if the heat exchanger exceeds 110°C ± 3°C.
Read fault code - pump Run/Fault LED: red — Vortex Pro External
The Wilo-PARA circulating-pump table identifies a constant red Run/Fault LED as the pump being stopped.
Read fault code