Protherm 80e combi boiler

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pooperscooper

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Can anyone out there help.
I am having problems with my Protherm 80e boiler.
when I run the hot tap the boiler only reaches about 50degrees and cuts out,and only comes back on when it has cooled down to about 20 degrees.
it has various new parts fitted but it still does not work,
parts fitted are new thermistor,diaphram,pcb,and the heat exchanger has been descalled.

any new ideas?
 
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Depends how old your boiler is ,the fault could be the hot water heat exchanger partially blocked.Drain boiler and remove but dont loose O rings flush out and refit If the water is not going through fast enough it will cut out on overheat stat,then keep fireing on then off.Hope this any help
 
pooperscooper said:
it has various new parts fitted but it still does not work,
parts fitted are new thermistor,diaphram,pcb,and the heat exchanger has been descalled.

any new ideas?
Click to expand...

I think that you mean that all those parts have been changed but the boiler still does not work!

The question then arises as to who decided to change those parts?

If its a professional then DONT PAY for parts which dont cure the problem!

If it was you who chose to change them then thats your own fault and a competent boiler engineer would have been cheaper!

Tony



PS Its all very well saying the "heat exchanger" has been descalled but WHICH ONE ? There are two !
 
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Agile said:
Its all very well saying the "heat exchanger" has been descalled but WHICH ONE ? There are two !
Click to expand...
Interesting. In your experience, how often does the main heat exchanger need to be descaled?
 
During the last seven days I have done two of each!

In each case both needed treatment !

Tony
 
Treatment to descale the main HEs to remove ( mostly) calcium compounds and treatment to the plate HEs to ( mostly ) remove metal oxides.

Tony
 
Agile said:
Treatment to descale the main HEs to remove ( mostly) calcium compounds and treatment to the plate HEs to ( mostly ) remove metal oxides.
Click to expand...
Sorry about this, Golf Bravo Niner, but you're breaking up.

For a moment I thought you said that you're seeing calcium build-up on the main HE and metal oxides on the DHW HE.

Please repeat. I repeat, please repeat. Over.
 
it was the plate heat exchanger which was descalled. and all the work was done by A British gas engineer, who now says I need A new Boiler
 
pooperscooper said:
it was the plate heat exchanger which was descalled. and all the work was done by A British gas engineer, who now says I need A new Boiler
Click to expand...

A ****ish gas engineer whose incompetence has resulted in random parts replacement, now there's a surprise. :rolleyes:

He's also on commission to sell you a (vastly overpriced) new boiler.

If you have a bg 3* contract insist that the senior engineer comes out and fixes the problem, thats what you pay for!

Better still ask them to send a group service engineer at their cost.
 
Whats a senior engineer?

Whats a group service engineer?

How to they relate to a TSM ?

Tony
 
Agile said:
Whats a senior engineer?

Whats a group service engineer?

How to they relate to a TSM ?

Tony
Click to expand...

a senior engineer is a TSM
group service is the makers engineers (protherm owned by vaillant)
 
dangermouse46 said:
a senior engineer is a TSM
Click to expand...

Not really as TSM stands for Technical Support Manager. 2 of the TSMs on my patch have no engineering background :rolleyes:

The senior engineer is usually the older looking guy that the TSM picks out from the guys available that day
 
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