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vaillant 824 hot water intermitent?

yes the boiler cuts off at 80 deg and on at 64deg do i need to replace the or can it be flushed

nari
January 2011
VaillantHeating, Home Heating SystemsHot Water Intermitent
carefree thanks for the good advice

nari
January 2011
You can't flush these heat exchangers without a decent acid.
The system probably needs flushing first, if you flush or replace the DHE, you're only going to fill it up with the same crap in the system you just emptied out of it

Carefree
January 2011
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