Grant vortex 26 combi oil boiler

Joined
24 Dec 2012
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Location
Norwich
Country
United Kingdom
Hi

last time no hot water but heating ok

I tried to descale the dhw heat exchanger but ended up buying a new one
anyway we have some hot water now but not all the time.
It seems ok when heating on but warmish othrer times , the boiler does not seem to keep up to temp and will fire if tap turned on any ideas

skelo
 
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Hi

last time no hot water but heating ok

I tried to descale the dhw heat exchanger but ended up buying a new one
anyway we have some hot water now but not all the time.
It seems ok when heating on but warmish othrer times , the boiler does not seem to keep up to temp and will fire if tap turned on any ideas

skelo

Plate heat exchanger must have been bad if it needed a new one.
Sounds like the diverter valve isn't working properly.
The boiler should fire when tap is turned on.
 
It may not have a diverter valve, depends on the age of the boiler. If you have two pumps, is the hot water pump working?
 
It may not have a diverter valve, depends on the age of the boiler. If you have two pumps, is the hot water pump working?


It has 2 pumps and a new plate heat exchanger , central heating ok and fine but boiler seems to be idle and not heating up water all the time could it be the sensor or thermostat maybe ?

ta

steve
 
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If it's the one with the braided metal/rubber hoses from the pumps they will be blocked stopping the boiler water getting to the plate from the h/ex.
 

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