Search results

TJ, The problem that you describe is symptomatic of a slow running pump. This can be caused by a build-up of sludge on the rotor or badly worn bearings. If after refilling the system, the air was not fully vented from the pump's motor housing, then the pump may have been run dry. This can...

If your system is a Y-plan (has a mid position 3-port motorised valve) then, as ArtfulBodger mentioned, it is normal for the boiler and pump to shut off when the cylinder stat stops calling for heat. While there is a requirement for hot water, the boiler/pump are powered directly from the...

Have a look HERE.

There's a pdf document about expansion vessels HERE that may help.

The pilot light heats up a thermocouple. The thermocouple generates an electromotive force (e.m.f.). The e.m.f. passes through a small coil (within the gas valve) to form an electromagnet. The electromagnet holds the gas valve open when the button is released. So, the thermocouple may have...

Not even water?

It might be worth trying to free the motorised valve before you replace it, by giving the moving parts a squirt of lubricant (WD40) and sliding the lever back and forth a few times. If this works then you may be able to postpone replacing it until after the heating season is over. If the...

In the summer, the boiler's full output still goes to the hot water cylinder - at a reduced flow rate, but at a higher temperature (just below the kettling point). So the reheat time will not change. When the hot water and central heating are on together, you need to balance the proportion of...

When your system is cold, switch it on in central heating only mode. The motorised valve that feeds the hot water cylinder coil should NOT pass water. If it does (you will be able to feel the pipe that connects it to the coil heating up) then the valve may have seized in the open position. The...

The pump bleed screw is usually a large diameter flat disc in the middle of the motor housing, and it covers the end of the motor spindle.

Sorry Gas2Air, I seem to have duplicated your answer. I didn't notice it while I was typing mine.

When your system is in hot water only mode, does the cylinder stat switch off the boiler before the water overheats? If so, then the cylinder stat is probably ok, and the fault lies within the motorised valve - allowing hot water flow to the cylinder when not required, whenever the central...

In a close-coupled system, the cold feed is the 15mm pipe that connects the small header tank in your loft to the system. The 22mm pipe, which hooks over the top of the header tank, acts as a safety expansion pipe, and should connect to the system pipework within 150mm of cold feed. Apart...

pict, If the pump is before the cold feed/expansion pipes (the neutral point), such that most of the system is under negative pressure when the pump is running, then the valve could suck in air (and leak water when the pump is not running). However, if the system is under positive pressure...

With a Y-plan, it usual to fit a gate valve (lock shield) between the 3-port valve and the cylinder coil, to balance the flows. The valve is adjusted, with the system in DHW only mode, by gradually closing it down until the boiler starts to become noisy (kettles), and then opening it up a...

There are electronic alternatives to JerryD's "Doberman" suggestion above, e.g. REX and ROBO-DOG. One problem with using any more aggressive approach is the possibility of revenge attacks. You may recall the case last year when a blind pensioner stabbed an intruder to death, after the thug...

emmacagain, External copper gas pipes must be protected from corrosion. If factory coated tube was not used, then the pipework should be protected in situ, e.g. with bituminous paint or suitable wrapping tape. Also, it shouldn't be installed where it is liable to suffer mechanical damage...

thundercats, The existing two wires are NOT live and neutral. They just carry a signal between two terminals on your boiler. The old thermostat, as MANDATE pointed out, functioned as a switch - to interrupt the boiler signal whenever the set room temperature was reached. Your new...

I've just clicked the link, and it worked fine. Try starting from Chaffoteaux's UK home page (www.chaffoteaux.co.uk) and select the "PDF Archive" from the "Products" drop down menu.

From your description, the flue is an integral part of the fire. Therefore, you really need to seek advice from the manufacturer. They may be able to offer an alternative flue terminal, but I suspect that they will just recommend replacing the fire with a glass-fronted, room sealed, model.