How much does it cost to fix Ideal error code Low mains voltage?

Typical repair cost for the Ideal Low mains voltage fault is £250-450 including labour.

Low mains voltage High

Ideal Low mains voltage Fault Code

Q: What does the Ideal Low mains voltage fault code mean?

Your boiler is receiving too little electrical power to operate safely, which may be caused by an issue with your home's electricity supply or a failing internal pump.

Also written as LOWMAINSVOLTAGE — same fault.

The Ideal Low mains voltage fault code means: your boiler is receiving too little electrical power to operate safely, which may be caused by an issue with your home's electricity supply or a failing internal pump.. It appears on 7 Ideal models in our database.

Technical description: Less than 185v to boiler then check voltage at boiler mains in if mains voltage is okay pump needs replacing

Typical repair cost £250-450 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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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.

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 27 April 2026