What does the Potterton On On On fault code mean?

Your boiler is showing a display pattern that suggests an internal wiring or control connection may have come loose or failed, and it needs a qualified engineer to check it safely.

How much does it cost to fix Potterton error code On On On?

Typical repair cost for the Potterton On On On fault is £100-220 including labour.

Potterton On On On Fault Code: What It Means & How to Fix It

What the manual says

Manufacturer manual

LV Wiring Harness or Output Selector Switch. Ensure 8-way PCB connector securely pushed in. If fault persists replace selector switch or wiring harness.

From this model's manual

Verified against the Potterton/Potterton British Gas Precision 4159233 installation & service 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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Boiler cover options

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All 12 fault codes on the Precision

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

Flash Flash On Flash Off Flash Flash Off On Flash On Flash Flash On On Off Off Off On Flash Flash On Flash On On Off Flash On Off On On On Flash

Your boiler is showing a display pattern that suggests an internal wiring or control connection may have come loose or failed, and it needs a qualified engineer to check it safely.

What the manual says

Engineer required

Avoid the next call-out bill

All 12 fault codes on the Precision

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