Vaillant Ecotec Plus 824 No Heating

Joined
25 Sep 2018
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United Kingdom
Hello everyone,

It seems my heating doesn't work fine anymore

When I try to use the taps, the boiler burner starts and the water flow hot as requested

When I try to use the heating, the boiler burner starts but it stops itself after few seconds

I had a look using the button "-" on the panel and I noticed that the temperature raise over the value I set then it stops the burner.It seems a "safety control" to avoid an overheating??

Is the issue due the faulty NTC sensors?

I saw the diverter valve pushing the piston in

Any clue?

Thanks.
 
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