Vaillant 831 plus plate heat exchanger replacement - how to?

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Have a vaillant ecotec plus 831

Could someone right up a quick how to.

E.g.:
>turn off cold water
> turn off boiler
> run hot water taps
........

Please see pictures attached for reference
 
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All you're gonna get is a lot of people telling you off for being naughty.

Take cover.
 
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Presumably you are doing this because of scale issues?

Be simpler and cheaper to hire a Kamco unit and run some descaler through.

That way, you can replace the room sealed cover before anyone on here notices you have removed it and work from outside the case.
 
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Yea just lime scale build up


Hopefully not I just wanted to confirm

- turn power off
- turn off incoming water
- run hot water taps till dry
- drain off primaries
- remove 4 screw / exchanger
- replace with new exchanger with new washers and a bit of silicone grease

Jon done
 
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I'm hiding under the sofa.....
 
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Standard forum replies

If the above is wrong and not how you would do it simply say so.

The boiler is serviced regularly by a GS engineer.
 
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All you're gonna get is a lot of people telling you off for being naughty.

Take cover.
Oh go on then, I'll do this one ;)

@Hazee unless you're Gas Safe Registered you shouldn't be taking the cover off your boiler - it creates the room seal that is there for your safety
 
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As above , hope ur safety is not important to you, and anyway these are not prone to scale ur wasting your time thats not the realistically not the problem
 
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I have zero love lost for these boilers, but..... The plate on these is as equally unlikely to scale up as it is easy to remove.

Hope you know your 26.9 checks to.
 
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I have zero love lost for these boilers, but..... The plate on these is as equally unlikely to scale up as it is easy to remove.

Hope you know your 26.9 checks to.

2:26am Dan!
Were you unable to sleep due to thinking about this thread? :LOL:
 
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Hazee, I'm afraid you won't get any help here when it comes to DIY work inside a sealed boilers combustion space, it's the forums rules. No-one that isn't gas safe registered should really be inside that space. It's really for your own safety.

Get your GSR in and let him diagnose and rectify whatever issue it is you are seeing, once fixed he can then ensure that the boiler is sealed back up properly by his standard checks and tests.
 

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