The main burner won't ignite in my Worcester 240 RSF despite the pilot light coming on.
I've followed the fault finding section in the manual. This seems to be pointing to replacing the gas valve.
I put the boiler on for central heating and did the following:
The spark electrode seems fine, doesn't look like it's worn out.
Checked that there is 240v on the sequence board that relates to the gas valve (CN4 Live) and there is 240v there.
The gas supply is definitely on (the pilot light lights) and the main burner is not blocked. All the holes and slots are still clear.
Is there anything else I need to check or is that it? Any other suggestions are most welcome. I just don't understand why the gas valve would just fail all of a sudden :? Could I take the gas valve to get it checked or can I check it?
How much should I expect to pay for a gas valve? The one that's in there is a Honeywell.
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