WBS @ Westmount

There must be a design fault with this part of the Vaillant Boilers.  First the hot water control knob just came away from the control panel on the boiler. This did not appear to have any resistance wile being turned.

I called Vaillant direct as the boiler was only about 3 months old and they verified my install date and arranged for an engineer to come around and replace the knob.

I was not at home when the engineer came but he spoke to my mother and said  this is a common issue and it is believed to be the red plastic moulding behind the knob that is causing the problem and that he would not refit this moulding.

The red plastic moulding that can been seen in the pictures causes the knob to have a click feel when turned but had no functional value to the opperation.

Now why am i placing this on my Web page you may ask?

Well the Engineer only changed the single hot water control knob wile he was on site and left me the service packet that contained 2 other knobs in case the other failed.

Well sure enough about 4 weeks later the heating control knob came off in exactly the same manner so I decided to take some pictures showing the dismantling and fitment of the new control.

PS As Always this information is supplied as is and for information only. Any work you do on your system is totally at your own risk.



Some Pictures Below.
Date 19/10/2010
Broken Heat and hot water control knobs on my new Vaillant 438 System Boiler.
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