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Ask your QuestionI don't have a hot water but I have a central heating. The display shows F81 & F91. What I can do?
Asked by Mariana on 6th Dec 2021Best Answer
"You either have a problem with the hot water pump or the plate heat exchanger is blocked either way you will require a gas safe engineer to look at this problem"
Answered on 6th Dec 2021 - Member since Jul 2020 - report"You will need to call a gas engineer out to fix the problem"
Answered on 6th Dec 2021 - Member since Oct 2021 - report"Hi, my name is Steve from SJS Plumbing and heating. The fault is specific to that model of Vaillant that has a hot water storage tank.The fault could be a blocked plate heat exchanger or the secondary hot water pump.
Unfortunately, you will need a heating engineer to fix it.
Many thanks Steve"
"It might be a pump problem or heat exchanger
Only a gas engineer can sort this problem
Thanks"
"It may be an issue with the pump or a sensor. Advised to get a Gas Safe engineer to diagnose further."
Answered on 6th Dec 2021 - Member since Nov 2021 - report"Sorry to say you need a registered gas engineer to look at your boiler. There is no self help when it comes to gas."
Answered on 6th Dec 2021 - Member since Oct 2020 - report"Try and reset the boiler what controls do UPI give for central heating?"
Answered on 6th Dec 2021 - Member since Jun 2020 - report"Hi
Possible fault with hot water pump on the boiler. This may well need replacing.
Hope this helps
Regards"
"I think the plate heat exchanger in my opinion but then again could be the pump. Need a gas engineer to look at it"
Answered on 6th Dec 2021 - Member since Nov 2021 - report"Your system is not circulating the heat out of the combustion chamber, could be a number of reasons. Have you needed to top up the system recently?"
Answered on 6th Dec 2021 - Member since Nov 2021 - report
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