Your boiler is trying to run but failing to start the flame, meaning you have no heating or hot water despite hearing the internal pump working.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: CHECK HOT WATER CIRCUITS AND RE-FILLING OF THE HEATING CIRCUITS; FILTER BLOCKED ON HEATING RETURN; FILTER BLOCKED AT CONNECTING SMALL CAPILLARY TUBE TO BOTTOM OF WATER SECTION; AIR LOCK IN PUMP; AIR SEPARATOR SCREW CAP NOT OPENED; WATER SECTION JAMMED; GAS VALVE SPINDLE JAMMED; DIAPHRAGM SPLIT OR DAMAGED
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
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Gas Safe Register →Protect yourself from future repair bills
A boiler cover plan would cover faults like BURNER WILL NOT LIGHT - WITH PUMP RUNNING — no call-out fees, no surprises.
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Chaffoteaux Celtic 2 24 Rsc is discontinued — time for a new one?
Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.
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