Faulty Relief Valve on Bosch Combi Boiler?
Discussion
Evening all,
I've only been in this house for 3 months or so. The boiler was great until the Xmas period, but since then it's been losing pressure every couple of days. I've been opening the inlet to top it up to compensate.
But tonight I noticed I was only getting hot water for 30 seconds at a time, then cold. Even running the hot tap beyond this the boiler wasn't firing. So I took a trip out to the garage to investigate and immediately noticed water coming out of this valve at the top. Current pressure is back down to 1psi (hot) and it's still dripping. There shouldn't be water coming out of there based on my limited knowledge. Does this mean the "bladder??" inside is bust? Yes I've been googling, although do remember this from my old system.
p.s what are the two grey inlets for on the top centre of the boiler?
I've only been in this house for 3 months or so. The boiler was great until the Xmas period, but since then it's been losing pressure every couple of days. I've been opening the inlet to top it up to compensate.
But tonight I noticed I was only getting hot water for 30 seconds at a time, then cold. Even running the hot tap beyond this the boiler wasn't firing. So I took a trip out to the garage to investigate and immediately noticed water coming out of this valve at the top. Current pressure is back down to 1psi (hot) and it's still dripping. There shouldn't be water coming out of there based on my limited knowledge. Does this mean the "bladder??" inside is bust? Yes I've been googling, although do remember this from my old system.
p.s what are the two grey inlets for on the top centre of the boiler?
Thanks for the advice.
I'll put the valve cap back on, perhaps with some plumbers tape and set the pressure to 1 bar cold tomorrow night before firing it up and see how it goes.
I did see it peak at almost 3 bar tonight which worried me, but I did probably top it up to 1.5 bar cold before firing it up. .
Will report back. Thanks again.
I'll put the valve cap back on, perhaps with some plumbers tape and set the pressure to 1 bar cold tomorrow night before firing it up and see how it goes.
I did see it peak at almost 3 bar tonight which worried me, but I did probably top it up to 1.5 bar cold before firing it up. .
Will report back. Thanks again.
Edited by scz4 on Tuesday 14th January 22:50
Well there's no more water leaking from that valve, was dry this morning. However, something more serious is happening.
I had no hot water this morning upstairs, but did downstairs, probably because the pressure was almost 0 bar this morning and a big pool of water under the boiler which wasn't there when I turned it off last night. Pressure was also 1 by the time it turned off last night, so it's lost pressure over night when turned off.
Time to call a plumber and get the credit card out
I had no hot water this morning upstairs, but did downstairs, probably because the pressure was almost 0 bar this morning and a big pool of water under the boiler which wasn't there when I turned it off last night. Pressure was also 1 by the time it turned off last night, so it's lost pressure over night when turned off.
Time to call a plumber and get the credit card out
Trustmeimadoctor said:
Handy link. Are they quite compettiive. It seems to be recommending me two boilers:
Worcester Bosch Greenstar 8000 Life 45kW @ £3300 fitted
or
Worcester Bosch Greenstar 8000 Life 50kW @ £3820 fitted.
Same heating output rating, only difference is the hot water flow rate.
Hopefully it's fixable, just need a plumber to actually call back. Got a Worcester\Bosch "representative" coming out to do a quote\survey tomorrow afternoon
Tonight I'm getting no hot water other than what seems to be in the system. So I initially get hot water for 30 seconds (assuming central heating has been on) and can see the flow temperature clocking down to 25 degrees when I then get cold water. The burner never comes on when the tap is open. A minute after the tap is closed the central heating kicks in again.
Tonight I'm getting no hot water other than what seems to be in the system. So I initially get hot water for 30 seconds (assuming central heating has been on) and can see the flow temperature clocking down to 25 degrees when I then get cold water. The burner never comes on when the tap is open. A minute after the tap is closed the central heating kicks in again.
Diverter valve
If your central heating is functioning perfectly but there is no hot water coming from your shower or taps, it is likely an issue with the diverter valve. This valve allows a combi boiler to switch between heating your radiators and your hot water, so when you turn on your hot tap, the diverter valve opens and sends hot water to the tap. If you are experiencing this problem then the diverter valve may be faulty, or it may be stuck in the central heating position.
If your central heating is functioning perfectly but there is no hot water coming from your shower or taps, it is likely an issue with the diverter valve. This valve allows a combi boiler to switch between heating your radiators and your hot water, so when you turn on your hot tap, the diverter valve opens and sends hot water to the tap. If you are experiencing this problem then the diverter valve may be faulty, or it may be stuck in the central heating position.
Thoughts I'd update this thread.. I received quotes for a new boiler, however one plumber let it slip that Worcester\Bosch do a fixed price repair for £275 even on a 17\18 year old boiler, so booked in for tomorrow. https://www.worcester-bosch.co.uk/support/boiler-r...
The leak has stopped after tightening that valve cap up, but still shouldn't be water coming out of there, still no hot water though.
The leak has stopped after tightening that valve cap up, but still shouldn't be water coming out of there, still no hot water though.
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