High
17 on Ideal Maximiser SE 42

Your boiler has detected an incorrect power setting configuration or an issue with the internal speed control.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

What the manual says

Manufacturer manual

The 11 kW jumper has been removed from the control panel or the partial load potentiometer is set at an insufficient value. If the fan only operates at low speed, the fan or control panel is defect.

From this model's manual
Verified against the Ideal/Ideal Maximiser Se 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.

Engineer required

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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All 40 fault codes on the Maximiser SE 42

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

- / A- / H- / Y= / H4 / A111213141516181920212223242526272829303132333435363738394041424344E / F

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