BoilerFaultCodesWhat the manual says
Manufacturer manualCondensate trap blocked
What causes this fault?
This fault occurs when the internal trap or the external drainage pipe becomes obstructed, preventing the boiler from safely disposing of the wastewater it produces during operation. The most common reason is a buildup of sludge and debris within the trap itself, or an ice blockage in the external pipework following a cold spell.
This fault is significantly more common during winter, as the wastewater in the external discharge pipe can freeze and back up into the boiler.
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 b 26: no call-out fees, no surprise bills.
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