combi boiler - no hw but ch working??

[joolee]

Hi everyone - any ideas would be much appreciated.
couldnt have a shower this morning
thought it was lack of pressure it that was fine. tried switching to boiler on and off then turning off the ch but nothing worked.
dials for both ch and hw are at no 9
light for the hw is not lighting when the hot tap is turned on.
eventually a bit of warmish water came but nothing to write home about.
I had this problem a few months ago but i cant remember what fixed it - please help!!

 

[MANDATE]

Had similar problem with combi. Hot water is cold.
Faulty diaphragm fails to move diverter valve, so diverter valve fails to trigger micro switch to light boiler in HW mode. (this was on a halstead).
I reckon yours is diverter valve related.

 

[joolee]

...i guess i need a plumber then

 

[Agile]

I reckon yours is diverter valve related.

When you dont know what boiler model he has or if it even has a diverter valve or if the diverter valve were to use a motor instead of a diaphragm then I dont see how you can come to that conclusion.

Why do you think that its not the hot water thermistor?

Tony

 

[namsag]

Here is my guess vaillant turbomax

 

[joolee]

sorry...yes its a turbomax 282! and belongs to a she !
I have a feeling when it happened a few months ago the diaphram was replaced so surely its not faulty again so soon?
i recall something being cleaned too - should have wrote it down cos i cant remember now ..........
anyway still not fixed yet and managing with the shower if the heating is on and the hot tap is only opened half way

 

[kevplumb]

the white plastic arm that operates the microswitch have a habit of snapping

 

[joolee]

thanks for that too - i think i need a crash course in plumbing - i relied on my husband (it helps that he was a heating engineer) until he left me with all this equipment i dont understand !!

 

[Agile]

i relied on my husband (it helps that he was a heating engineer) until he left me with all this equipment i dont understand !!

Well do what everyong else does with heating engineers!

Cal him back!

 

[joolee]

I keep calling but he still hasn't returned and after 6 yrs its not looking bery likely!!!

 

[namsag]

Not unusual for these to need the whole divertor as opposed to just the diaphragm , part is around 100 quid so best bet is call BG out on fixed price repair, Have a look at there website for details.

 

[joolee]

ok thanks - may just do that .... power showers are not what they used to be!

 

[Steve69the69Gas]

Where in Derbyshire (roughly) are you?

 

[joolee]

nr buxton

 

[Steve69the69Gas]

Soz toooo far