BoilerFaultCodesIdeal 76 Fault Code
The Ideal 76 fault code means: your boiler has temporarily stopped working because the electricity supply coming into your home has dropped below the safe level it needs to operate properly.. It appears on 3 Ideal models in our database.
Technical description: ALTERNATING ‘F’ AND ‘7’ - LOW MAINS VOLTAGE
DIY fix possible
Check if other appliances in your home are experiencing power fluctuations.Turn the boiler off at the fused spur or mains switch, wait 30 seconds, and turn it back on to reset it.Check your electricity consumer unit (fuse box) to ensure no trip switches have been partially tripped.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Avoid the next call-out bill
A cover plan would handle faults like 76: no call-out fees, no surprise bills.
Affiliate links. We may earn a commission at no extra cost to you.
Ideal models that show the 76 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ideal 76 fault code information on this page is sourced and cross-checked against the official Ideal service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 31 August 2026