Question about Heating & Cooling
Double check that the programmer is calling for the boiler to fire, and also that the thermostat is turned up enough.... you will hear it click as you turn it up... if the radiators still dont get warm...
then In the airing cupboard there should be a pump on a three port valve that says A,B, and AB on the different pipe outlets... It seems that this is possibly stuck in one position.... Sometimes the servo motor on top of the three port valve (square metal box with wires going into it) goes weak and requires replacement, these are not expensive from a decent plumbing spares shop I.e Pts (plumbing trade supplies) and are a doddle to install, just isolate power to it, take square the top cover off the valve to reveal the innards and you will see it straight away... Like a round brass cylinder with a flat top... It should have two screws holding it in...
Hope this helps
Posted on Oct 22, 2013
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Posted on Jan 02, 2017
SOURCE: Vaillant boiler (VCW GB 221)
The movement of the diverter valve is critical on this appliance, and is located on rear right of the boiler, when hot water is turned on, theres are two microswitches, which must break (they both close in Central heating mode), if pump is running, it is recognising the hot water demand, check microswitches are breaking, if not, it tends to be a defective servo valve (located above the water valve), or a blocked/ restricted control line (small copper tubes which connect into the servo valve)
Posted on Mar 03, 2009
SOURCE: baxi solo pfl60 problem. the
One thing I would check is the flame sensor. Your boiler may not have this on it but I have seen them act like this before. If you have one I would replace it. Hope this is ofsome help. Thanks
Posted on Nov 26, 2010
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