OVERHEAT
FAULT CODE
Grant
Overheat Thermostat Activated
High Severity
Engineer Required
The boiler's overheat safety thermostat has tripped. On Grant oil boilers this usually means the boiler thermostat has failed or circulation has stopped.
Step-by-Step Fix Guide
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Step 1
Turn off the boiler and allow to cool for 30 minutes
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Step 2
Check system pressure and bleed radiators
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Step 3
Do not reset the overheat thermostat yourself
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Step 4 Engineer only
Call an OFTEC registered engineer to reset the overheat stat and investigate the cause
Gas Safe Reminder
Work on gas appliances must be carried out by a Gas Safe registered engineer. The steps above cover safe checks a homeowner can perform - any internal component replacement requires a qualified professional. If in doubt, always call an engineer.