What does the Baxi 27 fault code mean?

Your boiler has stopped working because it either doesn't have enough water inside the system to operate safely or the internal water pump is failing to move the water around.

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

Typical repair cost for the Baxi 27 fault is £120-250 including labour.

Can I fix Baxi fault code 27 myself?

Check your boiler's pressure gauge on the front panel; if it is below 1.0 bar, use the filling loop to top the system up to between 1.0 and 1.5 bar

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

What the manual says

Manufacturer manual

Fault on Pump or Low System Pressure

Shared across the Combi Instant range

This code is shared by the boilers in this range, which use the same control board. It may not be printed in this exact variant’s 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.

Find a Gas Safe engineer

Search the official register →

Boiler cover options

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A cover plan would handle faults like 27: no call-out fees, no surprise bills.

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All 29 fault codes on the Combi Instant 80/105 HE

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

Your boiler has stopped working because it either doesn't have enough water inside the system to operate safely or the internal water pump is failing to move the water around.

What the manual says

Engineer required

Avoid the next call-out bill

All 29 fault codes on the Combi Instant 80/105 HE

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