vaillant turbo max vuw 242/1 e , no hot water

[volex]

hi, i know there seem to be a lot of these posts but am afraid i have gotten lost and need some help please . . .

i have a 'vaillant turbo max vuw 242/1 e' and the hot water has suddenly stopped working and hasnt worked for over a week now.

CH appears to be working fine, rads nice and hot straight away.

symptoms,

running hot tap with Centeral Heating off has no effect, demand light does not illuminate and boiler does not fire.

same also with CH on, no demand light and constant ice cold water from hot tap

pressure is between 1.5 - 2 bar

i have attached a picture showing my boiler with a microswitch arrowed . . . . .

View media item 27955
if i press and hold it with CH off and the hot tap running the hot water demand light illuminates and the boiler fires,
ice cold water still flows from the hot tap . . . i think there is hot water going to the rads tho? they seem to get hot

if i press and hold the microswitch with the CH on and the hot tap running the hot water demand light again illuminates and the boiler makes the usual sounds as if it is switching from CH to heating the hot water but the tap still runs ice cold . . .


do i have a faulty diverter valve? and is it the brass bit that the 'arrowed' microswitch is attached to?

or am i barking up the wrong tree?


i apologise in advance if i have missed a thread with the answer

thanks

martin

 

[petit_pablo]

The diverter has failed. Most likely it is just the hw diaphragm thats perished. Your call whether you just change that or the whole diverter.

 

[volex]

The diverter has failed. Most likely it is just the hw diaphragm thats perished. Your call whether you just change that or the whole diverter.

in that case id like to replace the diaphragm, could u point me towards a guide or somekinda instructions how to replace it please?

would be very much appreciated

thanks 4 the quick reply

 

[kevplumb]

instructions are in the kit

be carefull if it has the black plastic body on the water section (they have a habit of cracking)

 

[volex]

instructions are in the kit

be carefull if it has the black plastic body on the water section (they have a habit of cracking)

ok, thanks.

is the diverter the brass thing that i hav arrowed in the pic?

 

[kevplumb]

yes the water section is the disc type bit at the bottom

 

[volex]

yes the water section is the disc type bit at the bottom

i think i found it in the instructions i 4got i had

am i getting close?

View media item 27963
thanks

 

[volex]

i may hav found it?

could somebody confirm if this is what i need, there dosent seem to be a pic tho??

http://www.uk-plumbing.com/vaillant-diaphragm-010354-p-32703.html

not sure if there are spam filters so ill post the address again

www[remove].uk-plumbing.com/vaillant-diaphragm-010354-p-32703.[remove]html

thank you

 

[petit_pablo]

http://www.uk-plumbing.com/vaillant-diaphragm-set-010359-p-42888.html

Id get this one that comes with the screws, they tend to chew up easily.[/url]

 

[volex]

great thanks,

ill order and hopefully my next post will be 2 say thanks its all working lol

 

[kevplumb]

Id get this one that comes with the screws, they tend to chew up easily

and love flying across counter tops down cracks etc

 

[petit_pablo]

Id get this one that comes with the screws, they tend to chew up easily

and love flying across counter tops down cracks etc

and that