On 03/11/2018 17:50, DerbyBorn wrote:

After lots of checking a Heating Engineer has decided a mate's heating
system has a partly blocked boiler heat exchanger. Likely? 12 - 15 years
old. Has been pressure cleaned a couple of years ago.

Could even be the result of power flushing if not done with care (i.e.
remembering to take the boiler out of circuit prior to flushing so you
don't end up flushing crap into the HX!)



--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/