Heating is fine but hot water is not........

[pcd2503]

Hello,

Can anybody advise what could be wrong with my combi boiler?

I have a Volkera Combi boiler (sorry unsure of the exact model and i'm at work at the moment), the heating side of things is working as it should but whenever i use the hot water or shower etc i get an error code (02) which aparently is a problem with the unit overheating?

the pressure seems fine, the water flow doesn't appear to be affected. Could i have a blockage or air in the system??

I will probably have to resort to having someone look at it unless its something simple??


Thanks in advance
Chris

 

[Andygasman2010]

Possibly a blocked plate heat exchanger.

 

[pcd2503]

Thanks for you reply.

Is that fairly easy to unblock? i.e do i simply remove it clean it and refit or would i be better off getting a new one?

Thanks
Chris

 

[Andygasman2010]

You can removing it and clean it, use an acid cleaner such as kettle descaler or brick cleaner.

 

[pcd2503]

thanks, i'll give it a go tonight

cheers
chris

 

[Egga]

If its giving fault codes im guessing its a linea / syntesi? You ll have to drain the boiler and may need new o rings. Quite an involved job, especially on new years eve!!!

 

[pcd2503]

thanks, Yeah Linea rings a bell. I'm at work so can't check but i'm sure thats right.

Tell me about it, might just go out and forget about it tonight!!!! as long as i don't come in at 2am and decide to "fix" it..........

 

[pcd2503]

if it makes any difference, when you first turn on the hot tap the boiler does work for a few seconds, but then shuts down give error code 02 and runs cold.....

 

[Egga]

Gives the symptoms of a blocked plate.

 

[pcd2503]

yeah, reading similar posts etc it seems to be the usual suspect. I'll have a look at what sort of a job it is to remove and give it a go.

Thanks
Chris

 

[Andygasman2010]

Best test to do.

Run the hot water for a few mins till it's as hot as it's going to get, just before it cuts out. Then turn off the tap and check the display. If it's 90+ then you have a blocked plate heat ex for sure.

Andy

 

[pcd2503]

thanks, i'll do that when i get home