Low
LED4 on Ideal Mexico Super 40ff - 80ff

Your boiler is receiving electrical power and is currently functioning normally, as this light is a status indicator rather than a fault.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

What the manual says

Manufacturer manual

Mains electricity on

From this model's manual
Verified against the Ideal/Ideal Mexico Super 40ff 80ff installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

What causes this fault?

This LED is not actually a fault, but an indicator that your boiler is connected to the mains electricity and receiving power. It signifies that the internal control board is live and ready to operate the heating or hot water when called upon. If this is the only light visible, it confirms the unit is in a standard standby or operational state.

DIY fix possible

This fault may be fixable without an engineer. Check your manual first.

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Related fault codes

LED 2View →LED 3View →

All 6 fault codes on the Mexico Super 40ff - 80ff

Seeing a different code? Every code this model can display, in one place.

LED 2 goes OFFLED 2 OFF brieflyLED 2 ONLED2LED3

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