My boiler central heating runs just fine. When we run the hot water with or without the heating on, the water gets hot then the boiler turns off. Only by waiting some 15 mins can I reset the button at the top of the boiler to get it going. I suspect the water is too hot and the cut out is acting as it should. But how do I make the water stay under the cut off point. Two BG engineers have serviced in in the last year but cannot find the fault. Any Ideas?
Worcester 350 Combi boiler hot water problem
- Thread starter drew104
- Start date
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With the boiler cold, check the resistance of the green temperature sensors.
I think they should be about 10K but check the manual to confirm that. In any case they should both be the same resistance at the same cold temperature.
Tony
I think they should be about 10K but check the manual to confirm that. In any case they should both be the same resistance at the same cold temperature.
Tony
Hi Toni,
I am afraid I am not an engineer and would not know how to test the resistance or where to find the location. I wondered if it might be the water pump since I understand this boiler has two; one for the CH and another for the Hot Wate Supply.
I am afraid I am not an engineer and would not know how to test the resistance or where to find the location. I wondered if it might be the water pump since I understand this boiler has two; one for the CH and another for the Hot Wate Supply.
A routine BG "service" is only a safety check and even a proper service would often not pick it up as few people would run the DHW for very long on test.
I would suggest you may need to call a competent heating engineer.
Tony
I would suggest you may need to call a competent heating engineer.
Tony
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If there is a problem and you have a BG contract DONT wait for the service as this is only a general check over to make sure the appliance is safe as Agile said.
Get BG back out for a breakdown visit...they will check the appliance, I would be checking the gas rate is fully modulating on HW and after that prob change thermistors and overheat stat, possibly could be an intermittantly jamming pump.
Get BG back out for a breakdown visit...they will check the appliance, I would be checking the gas rate is fully modulating on HW and after that prob change thermistors and overheat stat, possibly could be an intermittantly jamming pump.
Thanks guys,
I will call out the BG engineer to look at it and let you all know what happens.
Drew
I will call out the BG engineer to look at it and let you all know what happens.
Drew
swap pumps round .if hot water then works and heating dont, then hey presto.
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As already said, its the HW sensor or a sticking HW pump.
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