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Old 12-12-2010, 08:09 AM   #1
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Vaillant advice needed


Hi All
I'd be very very grateful for any advice as I'm at my wits end. This started two weeks ago when I had a problem with fluctuating hot water temperature on a Vaillant Ecomax 824/2e combi boiler.

To cut a very long story short I've had a new heat exchanger (the main one), a new diverter valve, the small heat exchanger flushed with a chemical treatment, the entire central heating system flushed and all bar two radiators replaced with new ones. All this work was finally completed day before yesterday and over he course of the night the boiler stopped working.

The error code started out as F.22 and then after switching off the boiler and switching it back on the error code changed to F.24

The manual implies there's a problem with the pump.

My dilemma is do I go for broke and change the boiler completely, or get someone to change the pump and hope that it's the last item to change? I know there's still the PCB to change so I'm very wary that I may end up replacing two more new items only for it to be a terminal problem with the boiler and end up paying for a new boiler anyway.

Any thoughts? All advice very gratefully received as I've so far spent in the region of £1600.

Thanks for your help.
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Old 12-12-2010, 08:40 AM   #2
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Vaillant advice needed


I would change the pump. They naturally wear out and the impeller inside may be broken.
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Old 12-12-2010, 09:03 AM   #3
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Vaillant advice needed


Quote:
Originally Posted by yuri
I would change the pump. They naturally wear out and the impeller inside may be broken.
Thank you Yuri. Hope this is the last item... Would you expect that to happen in a system that's only four years old?
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Old 12-12-2010, 09:10 AM   #4
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Vaillant advice needed


Don't know where you are and what type of equipment quality you have. The pump may be working harder now that the other repairs are done or may be undersized or you have a flow switch problem etc.

UK? I found the install/service manual for your unit. Looks a lot like our high end Naviens, VERY complex unit.
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Last edited by yuri; 12-12-2010 at 10:03 AM.
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Old 12-12-2010, 10:54 AM   #5
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Vaillant advice needed


Quote:
Originally Posted by yuri
Don't know where you are and what type of equipment quality you have. The pump may be working harder now that the other repairs are done or may be undersized or you have a flow switch problem etc.

UK? I found the install/service manual for your unit. Looks a lot like our high end Naviens, VERY complex unit.
You guessed right I'm in the UK, thanks for the advice. Given what you've said it's hopeful that changing the pump will do the trick. Thanks again.
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Old 12-14-2010, 04:56 PM   #6
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Vaillant advice needed


Just a quick update - thanks Yuri for your thoughts. I have indeed had the pump changed and so far heating and hot water for four hours! The plumber is still not 100% happy as the hot water flow is a little low but we've decided to run it for a while and see how things go. Thanks for your advice it really helped me with my decision.
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Old 12-14-2010, 05:11 PM   #7
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Vaillant advice needed


Hopefully it continues to work well. Would be a pretty expensive service call to get me to check it. I do like fish and chips though.
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