Recent content by Larry Stoter

It's carrying 240 V relative to earth …

House is 1980s This is a downstairs room. Yes, there is 2-way switching for the landing light and yes, it still works with this extra wire disconnected. I could understand if there were both extra "live" and "neutral" wires to supply another light no longer in operation but it's a single...

Disappears into the ceiling cavity … :(

Just preparing a room at home to redecorate. Removed the ceiling light fitting and there's an extra cable … As expected, there are 2 x loop cables and a switch cable. Then a single, double insulated wire. Black inner insulation and it was connected to the rest of the black/neutral wires. Not...

The TRVs on my central heating system are old - 1980, perhaps. The actual valves are all working but some of the heads seem not to work properly, reacting very slowly or not at all to temperature changes. I assume the temperature sensors are wax which I have read tends over time to stop...

The power isn't cut to the thermostat - it is battery powered and remains active when there is a power cut or the mains is turned off. And when the power comes back on, the room thermostat and programmer reconnect without any problem. The programme is almost certainly not stored within the...

No, the room thermostat works fine. It is only powered by a battery and isn't a problem. How would the mains going off affect a battery-only device? It wouldn't. The problem is the controller, which forgets the programme when the mains goes off. There is a battery somewhere inside the...

I have a Worcester Greenstar Heatslave II oil fired boiler, around 4-5 years old. It was fitted with a Comfort Twin Channel Programmer with remote thermostat about 2-3 years ago. Everything was working OK. Recently, however, the programmer has, when the power is lost/turned off (we suffer...