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This morning had the f23 code. It is a new pump, am assuming the code may be due to it being on the lowest setting? When CH and HW are on, the rads don't get that hot. The gate bypass valve is also open. The light bulb was lit at the boiler SL

Terraced houses are probably less. She needs to move into a terraced house. Live and let live.

Not installing a product in line with manufacturer instructions would make it void from any warranty as well. But no way 6mm cable is fine for 10kw. We're talking about electric showers that suck up a lot of power, not flats.

Absolutely correct. That needs to be taken into consideration along with the length of the cable.

Still overheating with a new pump? I'm not a fan over those ups 3 personally. Don't really like them

I think the only nonsense was from yourself stating 6mm is fine for a 10.5kw shower??! You've not seen a 10.5kw shower?! Don't know where you have been then...

Get some white upvc to cover the wood. And silicone around any gaps. You can get various sizes. It might be cheaper if you can get it from a local window manufacturer or upvc supplier. https://www.screwfix.com/p/crystal-upvc-window-trim-white-2497mm-x-45mm/574gl?ref=SFAppShare

Depends on the voltage pen. Bought a cheap one and anywhere in the loft it would go berserk. Got a better with a pointed end and that required close proximity even touching it on the pcb terminals it was very accurate.

6mm cable for a 10.5kw? Not a chance! 6mm is sufficient for a 7.5kw The OP would also need an appropriate MCB and this along with the cable is calculated on length of run.

It depends on the environmental health officer. Some are absolutely clueless jobsworths that ask you to do the impossible. As others said, proper pics are needed. The site plan is pixelated and from that it seems the neighbours house is far away and you got a road on the front? On a windy...

If boiler is overheating that's an issue with your pump.

It gets hotter if I turn off other TRVs It heats up properly when HW is on as its plumbed into get hot with CH or HW. Y plan system. Small room, it is chrome, and is large. It used to get really hot when we had the non convector rads in the house, but they were sludged up so I guess the towel...

So the saga continues, as the convector rads can operate on a lower boiler temperature this then means the towel rad in the bathroom is lukewarm. Despite balancing the system and turning down some convector rads the towel rad isn't getting hot. At 60c on the boiler the house is warm but the...

Have you ever purchased a refurbished pcb? They're alot cheaper but it's the risk of it not being new which are £250 circa. Would the pcb part number be on the back of it? Seen some online photos of pcb but can't see the matching part number as on the description

Bathroom rad is lukewarm when CH is on. When HW is on it is hot. Had new big radiators fitted, and kept the same towel rad in bathroom. Prior to this the rad got very hot with the old rads when CH was on. Bathroom rad has been plumbed in so it comes on with CH or HW. But when HW and CH are on...

The fault happens in both HW and CH, together or independently

So for hot water it isn't supplied? And sl would be 0v? I was getting it before with CH only it was off, then it came on as did the boiler

Thank you. Heating came on more than an hour later of requesting it. It worked for 3 hours then gone off. The bulb is lit, the switch live isn't coming on in the boiler, the one on the green terminal. John I removed brown wire from terminal 3 and then the stat and programmer had no power...

When the water goes off in the morning the heating goes off too despite the heating timing is until 930am and water 8am. But in the evening when the water goes off at 730pm the heating stays on as it should until 9.30pm

I have got 130-150v on switch live sometimes And I have also got 0v on the pump wire on the green terminal In both instances the heating was turned on at programmer and stat calling for heat. At other times I got 240v but pump and boiler did not fire up. Multimeter did flicker from 240-500v...