my central heating and hot water switches
l live in a flat and have a 'fully pumped' gas central heating
system.attached is a timer which allows the hot water and heating to be
set independently.Each of them has it is own 'advance, one hour and timed'
facility but the heating wont come on without the hot water - this is a
recent thing.A plumber has replaced the pump and it has recently been
checked yet no one can offer an explanation.Does it have something to do
with the way l have set the timers?
You most probably have motorised valves in the system , these
valves open and close when you select hot water only or central heating.
Check for a faulty valve by switching on the heating and find the main
central heating pipe and check that the valve is the same heat on both
sides of the valve.If it is not, then this valve needs replacing. When you
activate a motorised valve allow a few minutes for it to fully open.
system working ok you got hot water priority
If you set the HW selector to OFF and turn on the heating
switch does the HW indicator come on as well ? If that is what you mean is
happening it is likely that the programme selector on the rear of the
programmer has been changed from fully pumped to gravity HW setting. What
is the make and model of programmer?? Do you have a 3 port valve
with/without mid - position or two zone valves? I cant see why the pump
was replaced!! Otherwise klamidia is probably correct.
Most likely to be the divert er valve may just be stuck but
usually requires replacing. On some valves it is possible to replace just
the head.
Klamidia is nearest. If it is a problem that has only just
started, the most probable cause will be the three way valve. If a plumber
has changed the pump, you have certainly paid for unnecessary work. If
either part is working the pump cannot be faulty. Would tend to get a new
three port valve. It is possible to just buy the head, but, depending
which make it is, i.e. Honeywell, some use a rubber ball to divert the
water & this can sometimes stick, so it would pay to change the whole thing o be on the safe side.
Could be that the HW time overlaps the Htg time.
However electronic switches do go wrong, I have one that failed today, so
check the timer. If you need to change it they are usually fixed to a wall
bracket to which the wiring terminals & the time switch unplugs from it. A
new one of the same type should then plug into he bracket.
Try to override the time switch to get the boiler going.Travis Perkins, a
nation wide company or Pumb Center sell most types of timer. Get a replacement if you can & fit it. If it doesn't cure the fault then take it back for a refund. Try to keep packaging in tact. If you do not feel happy with this, contact an ELECTRICIAN not a Plumber to look at the timer & the associated circuits. Best of luck
It sounds as though it could be a malfunction of a 3 way valve,
the solenoids on these are prone to failure and maybe the valve is stuck
halfway, you should be able to hear it operate, or you can override it
manually with the lever on the side.
Surely this is a fine set up because when you are heating your
home you have hot water.
The reverse would be problematic having to heat your house to get hot
water.
It could be deliberately set up this way and maybe you just haven't
noticed before.
I would keep it as it is because your not wasting money you want a warm room and you get your water heated at the same time perfect
when the plumber replaced the pump he wired it up wrong
if your sure its fully pumped then it is your electronic three
port or two port zone valve usually sited in airing cupboard
Don't be playing with it & be thankfull it comes on!
I would not mess around with it.
Call a gas engineer to make sure
Have a safe day
yep. sounds like some idiot wired them wrong. these should be
seperated.
5 posts
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