BoilerFaultCodesWhat the manual says
Manufacturer manualCondensate trap blocked
What causes this fault?
This fault occurs when the internal reservoir that collects waste water becomes full and cannot empty into your drains. The most common reason is a physical blockage caused by a buildup of debris within the plastic trap or a restriction in the external pipework. To prevent flooding and potential damage to the burner, a safety float switch triggers and shuts the boiler down automatically.
This fault is significantly more common during freezing winter temperatures, as the external waste pipe can freeze solid and prevent water from leaving the system.
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.
Avoid the next call-out bill
A cover plan would handle faults like b26: no call-out fees, no surprise bills.
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