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You can bleed some air from the pump itself, but that's a long winded way, what I meant was "bleed air from the pipework around the pump inlet", this is so the pump inlet always has some water to "push". Where's the inlet? There's an arrow cast into the pump body pointing from the inlet port...

Dear all, I've inherited a duff mobile phone with the following symptoms, I'd like to get it functioning. 1. Phone won't work 2. Phone won't switch off, and displays the following notice: Boot loader 0A.30. SW Version: R479_G_08.B4.8 5R PHONE CODE SIG ERROR: OK TO PROGRAM USB...

Thanks Chris, I've checked for a check valve, none is obvious, and there's about 13m of 15mm mains pipe from the stopcock to the boiler inlet. Is there a DHW temperature pot on the control board? Don't expect that to be the cause as the DHW thermistor is 8" downstream of the combustion box...

Here's one I haven't seen before. Customer has a Worcester 24i. When the heating is on the DHW cold feed gets very hot all the way back past the flowswitch, almost to the cold inlet isolator. This happens within 30 seconds of the heating being switched on, then the joints around the...

Do a search, answered a hundred times before on here. MM

It's easy to connect a timer to the performa, but not strictly legal. This one falls foul of the building regs doc L1 which requires time and temperature control to the CH. You are proposing just time control I think, but if I'm mistaken & you have a roomstat tucked up your sleeve then connect...

Despite the name, boilers are not designed to boil water. If they do they cause banging & crashing noises for several seconds before the noise subsides. Why would a boiler boil? 1. Lack of water circulation, if the heat energy is not taken away the temperature of the water remaining rises...

FFS, use a tissue and use your eyes. Tell us where the leak comes from, then maybe someone will be able to help. It's abit like saying "help, I have water on my kitchen floor, where is it coming from...?" MM

Nice pics, a lesson to anyone else trying to communicate a problem. The valve you have is quite old, and may be ready for replacement (now branded Danfoss), however you should be able to squeeze some more life out of it by turning the brass 'D' shaft around several times to clear it of the...

1. Is the boiler in the main house? 2. Is it in an outhouse or unheated area? If unheated there should be a frost-stat near the boiler (looks like a roomstat). It may be set too high, about 3C is usually adequate. Otherwise look for a stuck motorised valve on the heating circuit which is...

1. Is the boiler in the main house? 2. Is it in an outhouse or unheated area? If unheated there should be a frost-stat near the boiler (looks like a roomstat). It may be set too high, about 3C is usually adequate. Otherwise look for a stuck motorised valve on the heating circuit which is...

The short answer is bleed it from the system high points. Concentrate on bleeding air from the area around the pump, if the pump works properly it'll push air into the rads where it will be easily bled off. Turn the heating & hot water system ON, but the boiler OFF at its dial. You can...

If you've room for a cylinder go for that, with a pump on the shower supplies only. Coffin tank in the loft should be adequate for basin and toilet filling without the pump (just make sure there's access to the ballcock for maintenance - think of us poor fat sweaty blokes with bad knees)...

Check that at least one TRV is either fully open or it's actuator head is removed. As you say the system takes a long time before it starts to bang & crash, this could be warming-up time before the TRVs shut. Check also the pump is pumping correctly, and that the banging doesn't coincide with...

Thanks for that namsag. Glowworm supply a SIT valve replacement kit, considerably more expensive though! MM

...and maybe a hole in the hot water cylinder's heating coil, as it's not normal for "pumping over", the symptom you describe, to cause the header tank to overflow. Try tying up the ballcock, or better still turn off the mains supply to it, then see if it still overflows. Remember, water...

Man of gas, normally I'd agree with you, and your last post makes perfect sense, but add the following comment:- and you can see where the inconsistency lies. This is too regular to be a "stuck" gas valve or a broken winding on the solenoid (which regularly repairs itself), which is why I...

Hate to be a spoilsport, but I think you have mis-measured the solenoid voltage on the gas valve. If you had 240v on the coil and the main burner is off, then what turns it ON when it does come on???? I read you've checked all the external components. Does the pump pump? i.e can you hear...

First check the pump is set to speed 2 or 3 (out of 3) Try this simple test. 1. Turn boiler temperature setting to about half way. 2. Turn on CH but not HW 3. Turn roomstat right up high 4. Does the boiler ever stop burning (flame out, green lamp flashing slowly? 5. Do ANY of the rads...

might be a case of manslaugter (is daughterslaugter a word?) if you dont fit the mandatory (and supplied) zone valve to each megaflow. 55 gallon is about 250 litre. Normal sizes are 210 and 300 litre megaflow, both of which are large enough on their own Your use of imperial sizes makes me tend...