Damn Worcester Boiler

Mina131 · 17 Jan 2011

OK, admittedly it's been doing fine for quite a while but now I just to want to know why it's not working!

I have a 28CDi RSF. In December the DHW light started flashing so I called someone and they replaced the fan. Afterwards the DHW light started flashing after the central heating had been on, say for a couple of hours. This wasn't related to switching on the hot water tap or anything specific.

So someone came to have a look at that and now the CH light flashes every time I use the hot water and sometimes even when I don't. Plus the pressure rises without cutting off, to the point when I woke up in the morning and saw water all over my kitchen floor.

I know I am probably just going to have to get a new boiler but now I just want to know why it's doing these things. I figured it needed a new thermostat. Could it be the CH sensor or DH sensor? Plus the yellow wires connect to a switch/board and these are loose. I presume it could be these as well but if so why?

Any help would be appreciated as it's doing my head in!

muggles · 17 Jan 2011

Mina131 said:
Plus the pressure rises without cutting off, to the point when I woke up in the morning and saw water all over my kitchen floor.

Do you mean the pressure rises even when the boiler's not in use? If so I suspect either a dodgy filling loop or more likely a knackered heat exchanger

Either way the pressure relief valve shouldn't be discharging into your kitchen

muggles · 17 Jan 2011

Mina131 · 18 Jan 2011

Hi. Thanks for answering. No sorry it doesn't rise when not on. It rises to the extent that I have water everywhere. Does that mean it's coming out of the pressure relief valve?

Many thanks again

jordy_boy · 18 Jan 2011

Hi im not a plumber i will say right at the start. But my pressure release valve had a leak at one time it was fine normally but if it was actually activated the water would leak all over the kitchen side as well as going out the pipe outside. I would think if you looked at the valve on your boiler you would see some signs of water having leaked from it.

jordy_boy · 18 Jan 2011

Also if it helps the pressure problems with mine where firstly the filling loop was letting water by so gradually pushing the pressure up so i just disconnected it and blanked it off. Also the expansion vessel needed re pressurising. I have been told thats normally the problem if your pressure rises a lot when central heating is switched on. Again tho im no plumber. Just really clever

Nige F · 18 Jan 2011

muggles said:
.

What do you expect - it`s Worcestershire - BOSCH

Damned Hun

Nige F · 18 Jan 2011

jordy_boy said:
Also if it helps the pressure problems with mine where firstly the filling loop was letting water by so gradually pushing the pressure up so i just disconnected it and blanked it off. Also the expansion vessel needed re pressurising. I have been told thats normally the problem if your pressure rises a lot when central heating is switched on. Again tho im no plumber. Just really clever

You are as clever as a RGI

because they know that the filling loop should be left disconnected as you did to yours

Have a Putty Medal and join the Combustion Chamber

jordy_boy · 18 Jan 2011

oh thanks. Think i will cancel that installer next week and fit my new boiler myself now.

Agile · 18 Jan 2011

Mina, the expansion vessel needs checking, see FAQ.

Someone needs to check the sensors if lights are flashing on DHW when its only providing heating.

When a boiler gets to be about 10 years old there are often several minor and intermittent faults and if you dont get someone competent and interested they only do the minimum to make it work again!

Tony

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Damn Worcester Boiler

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