Hoping for some guidance..
- About four weeks ago I noticed the the radiators were taking longer
and longer to warm up.
- I decided (for no reason other than it's never been done for 7 years)
that the system is probably gunged up, and needs draining and refilling.
- Most of our radiators are at least 30 years old; it is a microbore
system (dammit); inhibitor was put in when the system was last filled, 7
- I was delayed in booking a plumber by a holiday, and by a family visit.
- While the family were here (last weekend) the system packed up
altogether: no heat to the radiators, and the hot water not working well
either. Then the boiler started to stall, with a "Circulation Fault"
(this is a Glow Worm Flexicom HX, Fault code 25).
- (Assisted by a Google search on the relevant fault code), I was
encouraged in my belief that the system is bunged up and needs flushing.
- ... two different plumbers whom I've contacted (both unavailable for
weeks btw) both said there's no reason why it should be bunged up if
there is inhibitor in the system.
- So could it be the pump that needs renewing? Or perhaps the 3-way
valve? Or maybe there's a boiler fault? But ...
(a) the pump makes a noise like it's working (it's on speed 2 of 3);
(b) and the 3-way *seems*
to work, in that the relevant pipes get warm
at the relevant heating stages;
(c) and the boiler doesn't *seem*
to be complaining, other than
stopping with the Fault Code when it's had enough of trying to reach,
and sustain, operating temperature.
The two plumbers I've contacted aren't available for a fortnight, and
moreover seem reluctant to take on this sort of job. I am willing (and
moderately able) to do "something" myself, but I'm extremely chary of
doing anything, unless I know what the "something" ought to be. For
example I would drain the system and refill, if I could be confident of
doing it correctly -- there's ample opportunity for screwing things up
worse than they are already.
If anyone's got any broad-stroke advice for my next move, I'd be very
grateful. I'm well aware, btw, of the excellent section in the Wiki,
http://wiki.diyfaq.org.uk/index.php?title Κtegory:Heating but (as I
have been saying ad nauseam) I'm not sure where to start.
"Thank goodness it's Spring"