Vaillant ecomax 824.. F23 fault code..

Joined
12 Dec 2008
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Location
Hampshire
Country
United Kingdom
Hi,

Got a problem with an ecomax 824 showing F23 code..

CH not circulating properly even though system pressure is ok and all rads vented..

HW cutting from Hot to Cold..

Suspect sluggish pump as Heating circuit not circulating correctly.. Pump is running though..

Display shows temp rising pretty quick when firing up then cutting out also some kettling noise from the heat exchanger..

Would a fault with the Ntc's cause this or is the Pump to blame?

Thanks
 
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Can any of you guys help with this one?

Also can I just fit a head replacement for the pump instead of buying a complete pump assembly..

Any advice appreciated..
 
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Sounds well blocked!

Have you removed the pump head and inspected the impeller?

Tony
 
Refers to circulation problem

Check the rubber hose on the pipework these are prone to deteriorating and blocking internally
 

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