Vaillant ecotec plus 824 r1

[jitenbulsara]

I have a few questions regarding common issues on the 824 r1
Expansion v flat so re charged n holding
Flow hot n returns good
It has the rubber hose at both rear ends

Is the vaillant with main heat exchanger issues and was there a fix for the rubber hose or is this down to the owner as they do go hard and can burst?
Any info would be great
Thanks

 

[Last Plumber]

Best to replace them if there's a problem. They can corrode inside ( mesh strengthener) and partially block the hose, plus as you said, they can burst although I have never seen that happen ( I've heard a few say it though).

 

[gas2016]

The Wilo pumps that were originally installed in these tend to breakdown and were replaced with a grundfoss kit ( about £140!!!! ). You can get replacement copper pipes for the rubber hoses for around £100!!! but the rubber replacements are around £15. I'm sure you must know about the pressure sensor and the F75 fault!!!
The EVs go flat on these quite quickly

 

[gas2016]

Forgot about the diverted valves