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Check your circuits again, sounds very Neural to Earth to me. Also check continutity of rings, the times I have found the Imm Circuit in with one leg of the ring and the other leg of the ring on it's own connected as the Imm, where the original installer did no testing.

Before Wiring Centres it was common to find a 4 or 6 terminal Joint Box in the Airing Cupboard used for the connection of the controls.

You would not get a SqD Qwickline II 5 X 5 Split Load for £60 fully loaded. However CEF M2 6 X 6 fully loaded £35 and rubbish.

I take it there are also lights on the same circuit then, or is it that the heating is wired in 1.0mm² or 1.5mm².

Yes that's right. The schematic is on page 16.

As you can see, pump is connected to the common terminal, then you have the switched boiler supply and a permanent supply. Under normal conditions the pump is supplied along with the boiler, but on temperature rise the state of the stat changes and puts a direct supply onto the pump until the...

See here, http://www.firebird.ie/installation/S-Range-MANUAL.pdf Page 13 explains pipe stat and later shows schematic.

What system do you have, is it fully pumped hot water and central heating, with one or two valves (S Plan or Y-Plan). Is it gravity hot water and pumped central heating. Do you have TRV's fitted to all radiators, at least one upstairs should not have a TRV, usually the bathroom, this then...

This a power shower, not an electric shower !!! Hot water from cylinder.

John, I don't think the motor will be spinning, once the power is removed the water against the impeller blades would act as a break. The motors in these units are normally sealed 12V and ingress of water unless it's getting on the pcb would need to be bad. Most exposed parts inside are...

I have not fitted this make before, does it have an integral transformer or is it a remote transformer for the unit. After running the shower, letting it trip, isolate, have you then checked inside to see if you do have any water or moisture inside the unit. I see the the unit is on your...

Normally the thermostat is not near the boiler or controls, so will need to be wired through the property, in this case 6243Y 1.0mm² or 1.5mm² would be used which has a bare cpc. This is the type of cabling used for fixed wiring within a domestic dwelling. Did you use a 3 or 4 core flex ...

Have you connected a Neutral to this thermostat. I would not say 0.75mm² flex is correct wiring for a thermostat, but then that's another story.

Do you use you switch to switch on the shower before you get in it ? If yes, you have more than likely melted the contacts. The switch is designed for OFF load switching and not ON load switching. Replace the switch is the only answer. If no, then it could just be general failure of the...

A registered Electrician should not issue a Domestic Installation Certificate for work unless installed by him or his employee's. It's also within his or her own interest not to for safety and legal reasons. Periodic Inspection Certificate is fine but not Installation Certificate.

Normally with the under floor heating all the cabling would be flushed in so terminating behind the fused spur keeps it looking neat and tidy. The controller would be next to it with under floor heating cable and temperature probe terminated into the controller with the supply from your fused spur.

May even be the transformer or motor breaking down under load. Transformer or motor cold when you start your shower, then as you take your shower the transformer or motor gets hotter and hotter which coincides with the end of your shower until the leakage exceeds the trip rating and puts the...

From memory you have set low setting, which if the temp falls below this it comes on regardless of your temp setting, so setting to say 5° will stop this.

Rjb, I have been in the trade for 35 years and self employed for 21 years. There are Highs and Lows, and I have seen many go down the pan during this time, the main reason being that they did not charge enough for the work being done. It's OK having shed loads of work, but if your prices...

DESL, He said it was a Power Shower, not an Electric Shower. Most Power Showers are less than 3A, so it may have even been tagged on the lighting circuit with a transformer in the loft. What we need to know is, what circuit is it on and what fuse type or rcd is tripping. Also what type...