Valiant VCW GB 242

[kevplumb]

Overheat cut off device is behind pump,perhaps you might look it up.

sine 18 mebbe

242e

 

[Gasguru]

Overheat cut off device is behind pump,perhaps you might look it up.

sine 18 mebbe

242e

Here's 2 different VCW GB242EH boilers with the overheat stat behind the pump on the right (the parts lists however show it behind the control box though). I've always found the stats behind the pump on this model.

 

[kevplumb]

smart ass we dont fit that southern crap up here we only fit proper boilers

 

[leighyarker]

yep the little black box is behind the pump, when i pressed it, it didnt move at all so i took that to mean it doesnt reset.

 

[DP]

namsag, manual ignition will not work as VCW 242 has to have the combustion cover in place for ignition sequence to commence.

 

[ChrisR]

has to have the combustion cover in place for ignition sequence to commence.

Blimey, someone's caught him out!!

 

[namsag]

In theory your right DP but find that most of them will light with front case off . Try it next time you work on one. Or as pro`s we could have the air pressure switch made as we tried it...

Not caught out yet chris But will always hold hands up if i make a mistake

 

[leighyarker]

Thanks for all your help, had to send the little un to aunties for the week, is there anything else i can do before i hit the yellow pages.

 

[namsag]

Phone BG THEY DO A FIXED PRICE REPAIR AND WONT RIP YOU OFF, LIST PRICE OF BOARD IS £120

 

[DP]

Namsag, while the aps can be operated (manually) to start ignition sequence, there is no theory involved when I say the buner will not light unless front cover is in place.

VCW242 is a 24kw fan flued boiler. 241 or 240 will indeed ignite when the combustion chamber door is removed.

 

[namsag]

Dp i know 242 is a fan operated boiler which is why i said air pressure switch could be by passed... I know how numbering system works on this series of vaillants if it starts with a 2 its a combi if it starts with a 1 its a heat only boiler.. if it ends in a 1 it has a pilot and if it end in a 0 it is conventional flue (very rare). But have not seen a 242 that will not light with front case off it may not be supposed to work like that but they do..

So what do you think is wrong with this boiler DP seeing as it could never have been over heat cut out seeing as it`s goimg through ignition sequence

 

[DP]

First port of call would be the flow switch atop the gas valve.

It has already been established that the green and yellow LEDs are on, suggesting ignition sequence is on its way. I would attach a U gauge to the main burner test point to check for gas at the burner.

Above means nothing as it is pure speculation as I am not in front of the boiler.

WRT the buner lighting with frontal cover off, I have yet to encounter one yet. But then I could be wrong as all the VCWs I have looked at could be defective on that front.

 

[namsag]

And that will always be our trouble DP unless we are in front of boiler and seeing for ourself exactly what it is doing or noises it is making we are only guessing hopefully educated by still guessing