BoilerFaultCodes
Grant Boiler Fault Codes
483 fault codes across 18 Grant boiler models — explained in plain English.
Irish manufacturer of oil and renewable heating systems. UK market leader for oil boilers.
Just want the most common Grant problems?
The top 8 faults across the whole Grant range — causes, DIY checks, repair costs.
High-severity Grant fault codes
PP1 PP2 PP3 PP4 PP5
Your boiler has stopped working because it cannot correctly measure the temperature of the water returning to the unit.
Vortex
Your boiler has detected a problem with a sensor that monitors the temperature of the exhaust gases, and it has likely stopped working as a safety precaution.
Vortex
Your boiler has stopped working because an internal sensor that monitors the temperature of the heating coil is no longer sending a correct reading.
Vortex
Your boiler has stopped working because one of its internal sensors is failing to monitor the temperature of the water returning to the unit.
Vortex
Your boiler's internal thermometer that measures the air around it has stopped working properly, preventing the system from operating safely.
Vortex
All models
18 Grant boiler models
Vortex
Oil
Vortex / Eco / Pro
OilCombiSystemRegular
Vortex Blue
OilSystem
Vortex Eco
OilSystem
Vortex Pro Combi
CombiOil
Vortex Pro 15-26
Oil
Vortex Pro
OilSystem
Vortex Pro Combi 26
CombiOil
Euroflame
RegularOil
Vortex 15-20
Regular Discontinued
Vortex 20-26
Regular Discontinued
Vortex Combi 70
CombiOil
Vortex Eco External Floor Standing
Regular Discontinued
Multi Pass
System Discontinued
Outdoor Combi 90 Mkii
Combi Discontinued
Spira
System Discontinued
Vortex Blue / Vortex Outdoor
SystemRegularOil
Euroflame Condensing
OilRegular Discontinued