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I've just installed 2 digital temperature probes on the boiler flow and return pipes, to try and ensure the boiler is condensing, below the magic number( what ever it is, but that's another discussion). When the system start up from cold in the morning the temperature difference between flow and...

I've just replaced an insulated flexible duct that form part of our warm air heating system. After a few hours of running the room it feeds still hasn't warmed up much. So I went up into the loft void where the duct runs and it was quite warm to touch. I them put a temperature probe at each end...

In example 4 if a stray live conductor touched the isolated copper pipe it would raise it to mains voltage but would not trip any safety devices as there is no path back to ground (its isolated). If you then touched the copper pipe/tap while standing on a wet floor for example you would receive...

thats what i thought just bridging the plastic tanks and bath etc. and join all the copper back to the main earth point my the meter

sorry my bad English I got it the wrong way round I meant dead short. Water pipe is blue MDPE plastic, and gas is yellow MDPE plastic so no bonds where they come up from the ground when they change to copper they are earth bonded to as are the pipes in the airing cupboard back to the CU in the...

Just a standard multi meter with manual range selection. the cable is 16mm T&E

Hammered a long screwdriver into the wet ground outside and repurposed an extension lead to run back to the garage consumer unit checked between Live, neutral and earth and the ground outside, via the extension lead and screwdriver and I've got infinite resistance i.e. dead short on all 3, So I...

it's nearly 60m so I'd prefer not to pull it out if I can help it. If I do pull it out I might as well pull a new one in at the same time, as it's going to take ages and at least i should have solved the issue with a new cable. If it is the cable. One thought i had was to wire and extension lead...

No its a single cable between them no joints. We did have rain so could be a possibility, but its run through a duct the whole way and the duct looks dry. I've just re checked with the cable disconnected completely at both ends (hanging in free air as opposed to in a screw terminal with the...

I've just gone out to the garage and found the power was off. The small fuse board in there was all on, but when i check the main board in the house the 45A RCBO that feed the garage was off. I tried to turn it back on and it just trips straight off again, wont stay on. I then went out and...

there is a link between 3 and 4 hence i only ned 6 core not 7. I'd really prefer not to use all black cores, with the little numbers printed on them . potential for mistakes as it's inevitable in the back of a cupboard in a hard to see spot. Coloured is best.

It's a Danfoss, there's a Live, Neutral, and Earth, then terminals 1,2,3, & 4.

Just noticed this 7 core flex is all black with numbered cores !!! horrible

I was under the impression the earth was to protect the cable/flex if you cut through it not the device its connected to as these tend to be plastic nowadays, although the back box is metal so will need earthing

I need to relocate the programmer from inside the airing cupboard to just outside, unfortunately the cable/s are just too short so I thought I'd just replace them. Turns out they are 2 T&E cables with both earths used as switch lines, hence the programmer is not earthed! I've tried a few...

I've hammered a chisel between the head and valve body all its done is bent the head back plate which is now shaped like a banana. The head base will move freely and rotate but the shaft is firm, defiantly feels clipped in somehow. Did they make an all in one unit that couldn't have the head...

yes its got a dimple on the cover and i put it into manual position first. It's locked solid like there's a clip or something holding it?

Yes that's identical to mine, right up to 1:47 where he pulls the cover off! I've removed the 2 screws diagonally opposite each other, but the head is firmly attached to the brass valve body somehow? Any ideas?

Just put my hot water on for the 1st time in about 4 weeks (we've got solar thermal so don't use the boiler much in the summer), and noticed the radiators getting hot. Looked at the 3 port valve and is was really hot to touch. Thought I'd order a replacement head, as it's a newer style 3 port...

I've just picked up a 2nd hand pool heat pump, its a bit tatty but I was told it just had a faulty water flow switch. I have removed the water flow switch and tested it and it appears to be operating as if I move the paddle in the direction of the water flow it's resistance changes and it...