upstairs hot water warm

[unfinishedsweet]

Downstairs hot water in taps is very hot, upstairs is warm and the flame in combi boiler doesn't burn on full as it does while downstairs tamp open. That are the possible reasons?

 

[stevetheplumber]

Downstairs hot water in taps is very hot, upstairs is warm and the flame in combi boiler doesn't burn on full as it does while downstairs tamp open. That are the possible reasons?

not enough flow rate thru taps up stairs? diaphram getting old ?

 

[Puddle]

could be as steve says or also could be flow rate through boiler to high and now its the time of year when incoming water is colder,so boiler can not heat so hot,the kitchen tap may have restricted flow anyway,try restricting flow slightly at boiler or turn tap flow down,see if improves

 

[migoplumber]

or too much heat input into the boiler in hot water mode, causing the hot water to kettle - boiler turns off for 10 seconds - cools down - then refires, a case of less is more. turn down the dial on the front of the boiler governing hot water temperature. sounds back to front i know, but it works

 

[RoryD]

Downstairs hot water in taps is very hot, upstairs is warm and the flame in combi boiler doesn't burn on full as it does while downstairs tamp open. That are the possible reasons?

Is the flow rate the same? Could be a restriction preventing flow upstairs. This would cause modulation on the boiler.......OR..........
......Do you have a shower upstairs with a mixer valve? could be passing cold thru. Isolate cold water to boiler and run hot tap. If there is flow then that may be the prob

 

[Puddle]

......Do you have a shower upstairs with a mixer valve? could be passing cold thru. Isolate cold water to boiler and run hot tap. If there is flow then that may be the prob

nice call,had a few shower non return valves stuck open,causing same problem