Search results

Your boiler may have a pump-overrun thermostat that is sticking in the 'permanent live' position.

The thermocouple connects to an electromagnet, within the primary gas valve, via a limit thermostat. If the boiler over heats, the limit stat opens and interrupts the current that holds the gas valve open. So, the problem could be caused by a faulty limit stat or a bad lead/connection...

From the Water Supply (Water fittings) Regulations 1999 Guidance Document, acceptable arrangements for water fittings in walls:

Ariston Eurocombi SX20 MFFICE output ratings: Heating Output (max) = 23.1 kW (78832 Btu/h) Heating Output (min) = 9.2 kW (31396 Btu/h) Gross input ratings: Heat Input (max) = 25.6 kW (87364 Btu/h) Heat Input (min) = 11.0 kW (37539 Btu/h)

The telescopic copper connectors HERE may meet your requirements, but I've never tried them myself.

It would be better to drain the system, move the radiators outside and flush them individually (while slapping them with a rubber mallet to dislodge the sludge). Alternatively, you may be able to flush them in-situ using two hoses (the second hose to carry the exhaust water outside). Swapping...

Dezincification of brass alloys occurs when the zinc component separates from the copper base, thereby corroding the alloy. The inside of an affected brass fitting looks like the middle of chocolate Crunchy bar (honeycombed and with little mechanical strength). The corrosion rate of a fitting...

The 5102160 is, presently, available from HERE for £42.00 (including delivery), but you may find others if you do a search there.

The heat exchanger (gas-water) may have failed - allowing central heating water to enter the combustion chamber. Check if the boiler's pressure gauge is reading zero.

Was the filling loop disconnected after refilling? If not, then its valve may be letting by and causing the pressure rise. To bleed the pump, let the system cool (to avoid scalds), protect electrical parts from splashes, loosen the large diameter flat screw in the middle of the pump's motor...

Hi Glen, It could be a faulty timer/programmer ('CH On' switch), room thermostat or micro-switch (within the 3-way valve - the one that connects to the orange cable). Alternatively, a fault in the CH wiring could be the cause. If you have a Multi-meter, Volt Stick or neon screwdriver, and...

Malc, The heat exchanger coil in your cylinder must be very effective to take 14 kW continuously for 20 minutes. So, if you still want your system to have priority DHW, then a simple modification to your Y-Plan, which should work, would be to insert the 'Normally Open' contacts of a power...

It's based on a diagram from an old Honeywell book of Sundial heating plans: In my sketch, I used the existing 'CH On' switch as the system timer, though it could just as easily have been the 'DHW On' switch. It's purely academic now, but in what way is it wrong or wouldn't work?

That is correct Chris. A "Priority" W-plan (in this case DHW) only needs one switched live (timed) contact to control the system. The W-Plan document, on the web-site that you provided link to, states (on page 2): "Time Control - Any time switch or mini-programmer may be used provided that...

You would have to rewire from this: To this:

iknownothing, It is most likely the thermocouple that has failed. If you still cannot get anybody out to fix the boiler, then you may be able fit a replacement universal thermocouple yourself - making sure that the thermocouple's tip is completely enveloped by the pilot flame. They are...

Also, it is usual for dual-fill washing machines to feed the pre-wash powder tray from the cold supply and the main-wash tray from the hot supply.

Phill D, Unless the hot water pipework to the washing machine is short, then there's little point in providing a hot supply (the washing machine will have filled before the cold water in the pipework has run off). So, just connect both hoses to the cold supply as PEDANTICVINDICTIVEMAN...

ACDC, You might find THIS article (from the Guardian) about OCLI plumbing courses interesting.

CartHorse, If the gas supply has been turned off then there may be air in the gas pipework. If so, then the boiler will not light until the air purged. This may be achieved by repeatedly starting the ignition sequence, but it could take sometime because the boiler's ignition gas rate is quite...