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You have tested this by advancing the clock to an 'on' time, yes?

Horstman Electronic 7

Yes

I would cancel him and order one yourself (from Wilkes for example). The new one will fit directly on to the old wire box (no wiring required it 'plugs in') again assuming that we know the lower immersion element is serviceable.

Indeed, in my experience it will be the controller. assuming the immersion element is serviceable.

Ok, the one I posted repleaces the one you have. Just to save reading the whole thread, do you have confirmed that the elements should both function? When you advance the clock does the main element come on (ie can you hear anything like a kettle beginning to heat up from inside the...

Do you have a controller like the one in the pic I posted? OK, I assume bottom post om pg2 is aimed at me

Your system may be sealed or open vented. If it's sealed you will have an expansion vessel (red) somewhere and a filling loop as you saw in the other system you mentioned. If you have this type of system refit the rads and top up while cold to 1 bar or so. If you have an open system there...

Do you have a controller similar to this?: [/img]

What sort of tap is it? Monobloc or single tap, does it require 1/4 turn only or several turns to get water?

Dunno! Shut this one off again - disconnect and then try it. If you get wet look at the tap - if not change this valve. In any case don't forget to test the tap!

Quite!!

That's closed that is! Ignore the screw, that's a check valve

No requirement for DCV on standard kitchen/bathroom supplies. As long as you are using suitable taps backflow protection is via the air gap.

It depends which specific 24i model you have. some do, some don't. Specify!

Indeed, maybe a brass rad :shock: I don't like it either!

A customer, with unvented hot cylinder, has asked if it is possible to run the hot supply to a shower via a towel warmer so as to provide a small amount of heat to it while showering. Obviously in theory this is possible but ignoring the fact that the water will have cooled down somewhat by the...

In the flow from boiler, before the pump ie Boiler, vent pipe, feed pipe (one size down from vent) then pump. You should have done the plumbing course at college! :roll: :wink:

How old is this pump? It sounds like you have it connected to all fittings toilet, taps and shower. Therefore it does a fair bit of work. Correct? Has it just suddenly stopped working or has it been progressive? Had it started sounding different when it was running? Motor brushes could...

Soundness = leak free Refer to Terrywookfit's post. Just make sure the fitting is clean when you reconnect.