Worcester 24i RSF Intermittent lighting

Joined
29 Dec 2006
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Location
Plymouth
Country
United Kingdom
I have a Worcester 24i RSF which is about 3 years old. From new there has been a problem in that the burners only light intermittently. This applies to both hot water and central heating. A Worcester engineer came about 5 months ago and replaced the fan and the air flow sensor.
This week I have again suffered from cold baths and showers. I am posting this message now because tonight the boiler continually refused to light or lit only for brief periods. We went for over an hour with no heating. I have telephoned Worcester who are going to send an engineer on Tuesday. However they say I must pay a fee of £185 unless the fan or the airflow senor is found to be faulty. I have the original items which someone else has since tested for me and these work fine so clearly they were not the source of the original fault.
When there is a demand the fan starts immediately but there is not always sparking from the electrodes. When running a bath or a shower the water may start of hot but part way through it runs cold. No matter what is tried – taps repeated turned on and off- electricity turned on and off- the boiler may not light for a considerable period of time. I must emphasise that this is an intermittent fault. For weeks or months everything is ok and then there will be a week or two of problems.
Any suggestions?
 
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I would expect that the problem is caused because the gas valve is not set up properly.

On other models it would be the above or the ignition pressure setting but I dont think there is any adjustment on your model.

Many of the staff engineers are just parts changers and not genuine boiler engineers with good diagnostic skills.

Tony
 

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