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View the thread, titled "Oil Combi Boiler Hot/Cold/Hot" which is posted in Boiler Advice Forum on UK Plumbers Forums.

Hello. I have an oil fuelled combi boiler and the hot water starts hot, then goes cold for a few seconds and then back to hot... Is this right? Thank you.
 
Oil fired combis I think produce DHW at ~ 80C and reduce it to 60C with a TMV, if the HW from your hot tap is very hot (80C) then the TMV may be faulty and the shower(s) TMVs over compensate with cold water initially and then stabilize.
 

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Title
Oil Combi Boiler Hot/Cold/Hot
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N/A
Forum
Boiler Advice Forum
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Replies
5

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Created
Freddy1O,
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John.g,
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