Hi ,sounds like the hot water flow switch is faulty
Toby, Do you have a part number. cheers peter
Ok , sure give me a couple of mins , thanks
Will the hot water flow switch also turn on the gas burner?
Hi . not sure about that last now . this is the old hydraulic valiant system , there is no flow switch .just going to download manual
Need to check with valiant
Hi , sorry for the delay . there is a hot water micro switch ( m1) that should fire the boiler on hot water demand . this is under the grey servo unit . open the hot tap and check the switch is making . you can also try to operate it manually with a screw driver . this should make the boiler fire
Could you please send me a print of the grey servo unit & micro switch? cheers peter
Emails won't come up . they are blocked by the site unfortunately.
Is the micro switch at side of 'diverter valve'?
Vaillant - CombiCompact VCW GB 240 - Lets Fix It.
This will allow you to download the manual. Just getting the part number of the micro switch
The diverter is separate from the servo section . the water is diverted through the servo unit . this operates the hot water micro switch. If the pump is failing and too weak then the flow won't be strong enough to operate the switch . so it could be either the hot water micro switch. Which can be checked by manually operating it( boiler should fire ) or could be the servo unit. The other possibility is the pump needs replacing. You can check the pump by opening the bleed screw and pushing a screwdriver in and seeing if you can stop the pump spinning . if you can replace the pump.
Sorry , have to pop out for an hour
Hi . was that info ok?
Hi . the micro switches are under plastic covers unless they have been lost
Hi . how did you get on ? Was that info ok for you? If so would you mind rating me , thanks
I am in the process of calling in boiler engineer for direct advice,