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Hi all you experienced engineers out there, thought I would try a bit of buttering up first!!
I had a problem with a Potterton kingfisher CF180 today, just wondered if anyone has any ideas.
The boiler is an old cast iron boiler, permanent pilot Honeywell V4400C gas valve, as the rat thing on the telly says Simple's. Normally i would agree but!!
The symptoms are that when the boiler 'stat is satisfied and the main burner goes out it some times, i'd say one in eight times approx, it takes the pilot out.
I have tried everything I can think of, check burner pressure, gas rated the appliance, check that the pipe size is correct, checked the meter size is correct, check inlet of gas valve and surprise I found flakes of a mysterious black material that the transporters tell us doesn't exist. Cleaned everything out i.e. inlet isolation valve, gas meter, replaced pipework, pilot tube, injector and replaced the gas valve. No different, made sure the gas valve was correct and it is.
On its own and with main gas on the pilot is strong and well round the thermocouple, it is just as the main gas goes off the pilot seems to lift a little as if there is a strong draft across it or the pilot pressure suddenly goes up and the flame is lifting.
I have come to the end of my experience, any and all suggestions would be gratefully received.
Just to answer any questions before they are asked I am qualified on domestic and commercial with the correct competencies, which does make this all the more embarrassing!!
Many thanks in advance for your help
Kind regards
James
I had a problem with a Potterton kingfisher CF180 today, just wondered if anyone has any ideas.
The boiler is an old cast iron boiler, permanent pilot Honeywell V4400C gas valve, as the rat thing on the telly says Simple's. Normally i would agree but!!
The symptoms are that when the boiler 'stat is satisfied and the main burner goes out it some times, i'd say one in eight times approx, it takes the pilot out.
I have tried everything I can think of, check burner pressure, gas rated the appliance, check that the pipe size is correct, checked the meter size is correct, check inlet of gas valve and surprise I found flakes of a mysterious black material that the transporters tell us doesn't exist. Cleaned everything out i.e. inlet isolation valve, gas meter, replaced pipework, pilot tube, injector and replaced the gas valve. No different, made sure the gas valve was correct and it is.
On its own and with main gas on the pilot is strong and well round the thermocouple, it is just as the main gas goes off the pilot seems to lift a little as if there is a strong draft across it or the pilot pressure suddenly goes up and the flame is lifting.
I have come to the end of my experience, any and all suggestions would be gratefully received.
Just to answer any questions before they are asked I am qualified on domestic and commercial with the correct competencies, which does make this all the more embarrassing!!
Many thanks in advance for your help
Kind regards
James
