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the day time one is also live at night. it doesn't switch off. the night time one comes live between 11.30pm and 6.30 am

yes, the system is economy 7. but both are tripping.

no, the dynorod guy only fitted the immersion heaters as I have a policy with them and so that covers only the immersion heaters and no fixed wiring, which was why I had to employ a separate electrician to test the wiring when the newly installed immersion heaters tripped.

If NICEIC registered as approved contractor and domestic installer can't be relied upon then not sure how else you are supposed to verify a company's competence. I would expect they can still be incompetent, but I would hope NICEIC do checks on electricians before approving them!

then i don't know. i know there are two switches on the consumer unit for the immersion heaters, which i assume are what you guys refer to as MCB and the main switch on the consumer unit, which I understand is called the main RCD. i don't know if the MCB are RCBOs. the consumer unit was...

but i would expect they wouldn't get NICEIC accredited though?

i don't know what RCBOs are.

i suppose he could be unfamiliar with immersion heaters and do not know how they should be connected? i looked at a youtube video on how to wire them and there were 3 connectors, live neutral and earth, so i can't see how that can go wrong? i didn't see a video of the thermostat being...

the electrician did not say the immersion heaters were incorrectly connected. he said there was a loose wire, which he tightened but that was not the cause of the tripping. i think he would have known if the connection was not done correctly and have reconnected it.

why do you need G3 for unvented? is it more complicated to be unvented?

the companyis NIC-EIC accredited, so i assume he is qualified enough to be competent.

i think it is vented. i don't have a current pic but this is an old pic yes vented and unvented. the vented ones get the water from a cold water tank and the unvented ones get water directly from the mains. i don't think the difference would have any signifance on my problem though?

it just seems odd that both immersion heaters would be faulty. as they are wired individually, they can be tested individually and they are both tripping the RCD when they are switched on individually. the dynorod plumber says they are brand new as i suspected he may have used second hand ones...

as mentioned above because there was no hot water from the tank and so dynorod said the immersion heaters were broke. at that time, there was no tripping of the RCD, there was just no hot water. dynorod replaced the two immersion heaters and could not turn them on as the RCD tripped. so I got...

the main RCD.

only one immersion heater was working. the other one broke ages ago but we never bothered to call them out to fix it. so now that we have called them out they have replaced both. i did check the power rating as i asked the dynorod plumber what rating the immersion heaters were and he said...

Dynorod had come out to replace two immersion heaters and they did a very poor job. The power tripped when the immersion heaters were turned on so they said it was the wiring and we needed to get an electrician round to test the circuit. The electrician tested the circuit back to the consumer...

Is it possible for an electrician to identify where the fault is without having access to cables under the floors?

The consumer unit has tripped for the power downstairs. There were two switches on the consumer unit that both tripped and somehow the downstairs power and kitchen are related to one another as they both went out. The electrician came and has fixed the power to the kitchen but he says that the...

I have only one red and one black cable from the wall while my timer fan has switched live and permanent live cables. As you had suggested, should I connect both the switched live and permanent live on the fan to the red cable on the wall? Will this work, as I found that by connecting either...