BoilerFaultCodesIdeal LOW MAINS VOLTAGE Fault Code
Also written as LOWMAINSVOLTAGE — same fault.
The Ideal LOW MAINS VOLTAGE fault code means: your boiler is receiving less electrical power than it needs to operate, which may be due to a loose wire, a power supply issue in your home, or a fault with the supply line to the property.. It appears on 14 Ideal models in our database.
Technical description: Less than 185V to boiler
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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A cover plan would handle faults like LOW MAINS VOLTAGE: no call-out fees, no surprise bills.
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Ideal models that show the LOW MAINS VOLTAGE fault code
Click a model for the full fault code list and model-specific repair notes.
- Atlantic Combi Repair: £100-250
- Combi I Repair: £120-200
- Concorde Repair: £250-450
- Icos System Repair: £120-250
- Independent Repair: £120-250
- Logic Code Combi Repair: £100-350
- Logic Code Combi ESP1 Repair: £100-250
- Logic Max Combi Repair: £100-250
- Logic Max Heat 2 Repair: £100-£200
- Logic Max System 2 Repair: £100-350
- Logic+ Repair: £100-250
- Vogue Repair: £180-350
- Vogue Combi Repair: £100-£250
- Vogue System Repair: £120-250
Source
Ideal LOW MAINS VOLTAGE 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 7 July 2026