What does the Potterton 27 fault code mean?

Your boiler has detected that either the water pressure is too low for the system to run or the internal pump is unable to circulate water effectively.

How much does it cost to fix Potterton error code 27?

Typical repair cost for the Potterton 27 fault is £0-280 including labour.

Can I fix Potterton fault code 27 myself?

Check the pressure gauge on the front of the boiler; it should be between 1 and 1.5 bar.

Potterton 27 Fault Code: What It Means & How to Fix It

Technical description

Fault on Pump or Low System Pressure

What causes this fault?

This fault occurs when there isn't enough water pressure or flow to safely move heat away from the boiler's internal components. The most common reasons are a simple drop in system pressure due to a small leak or bleeding radiators, or a mechanical failure where the internal pump has seized and can no longer push water around your home.

This issue is frequently seen in autumn when heating systems are turned back on after being idle all summer, which can cause the internal pump to stick or seize.

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.

Find a Gas Safe engineer

Search the official register →

Your boiler has detected that either the water pressure is too low for the system to run or the internal pump is unable to circulate water effectively.

Technical description

What causes this fault?

Engineer required

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