central heating

Hello, I've currently got an air to water heat pump being controlled via a Centaurplus c17 series 2 with Honeywell thermostats in every room. I'm looking to replace the Centaurplus with a Google Nest Learning Thermostat 3rd Generation. I'll attach photos of internal wiring diagrams and...

Hi, My central heating runs on a Drayton thermostat - 90 minutes in the morning and 90 in the evening. Past few days the water has gotten cold in the mornings. I turn on the hot water panel of the Drayton (not the immersion switch) which heats the water, but I'm wondering if this is inefficient...

Hi experts, I have a Ideal Logic Combi ESP1 35 boiler and its c.6 years old in my 'new' build. I also have a two wired Danfoss TP5000si thermostats, one upstairs and one downstairs connected to two Danfoss HPA2 2-port actuators, as you'd expect. Problem I have is that neither of the thermostats...

Hi All, recently had the three port valve replaced. It worked fine for 3 weeks, now it is making loud banging noise when central heating is turned on from controller and there is call from heat from central heating thermostat. Please listen to the video in the link. The noise disappears when the...

Hi I’m trying to install Hive mini in 2 zone house. Upstairs bedroom has its in own zone. Wiring in DanFoss it just has a com and on wire in it - see photo. There are then earth and a grey with blue band which assume is neutral. Both are capped. I wired the new mini with grey in neutral, brown...

Dear plumbing and central heating gurus, Good evening. I recently noticed that underfloor heating pump is leaking. The heating is working. Due to the leak, boiler pressure keeps dropping. See the photos where the rusty water dripping through. I am wondering, for fixing the leaking, do I need...

Good afternoon all, I am soon to have a new combi boiler fitted to provide central heating and hot water (currently just have an old hot water boiler). I am in the process of fitting my central heating system pipe work, and I am hoping for some advice. I have drawn up a picture below of what...

In a sealed multizone CH system, does it matter whether the pump is between the pressure vessel and the boiler or whether the pressure vessel is between the pump and the boiler? (On the hot side in all cases) I know it matters in an open vent system but not sure in a sealed system. Thanks in...

I wanted to reach out regarding a peculiar issue I've been experiencing with my heating system, and I'm seeking your expertise for guidance. I have a combi-boiler located downstairs, with the tank and motorized valves situated upstairs, specifically two zones and hot wanter. Recently, I've...

All my downstairs rads come on together but upstairs won’t at all. Then when I turn all of downstairs off at the lockshield valves then I can get each rad upstairs to get hot but then when I turn the lockshield valves of downstairs back on the upstairs rads go cold again, has anybody any...

Hi everyone, About a month or two ago we noticed that the F and E was overflowing quite a bit. We also had some rusty coloured water. I can see now from research that this would naturally point to a hole in the coil. I had a plumber out, who I wouldn’t use again because he seemed completely...

We have a regularly WB boiler (with a Megaflo for HW, 14 rads mainly with TRVs and Wiser controls) and are having 2 distinct problems. Firstly, must add that following a misdiagnosis by BGAS about 3 months ago WB came out to check the boiler and it was fine then - it was subsequently serviced...

I am currently redecorating and the thermostat in my property looks ancient and yellowed. I found a nicer looking one, not too expensive on Amazon and wondered if the current wiring( Black,Brown,Grey and Ground) are compatible and in which way it should be wired. Thanks

Hi all I am just wondering which setup do plumbers/heating engineers like the best out of these 2 systems with CH header tanks in the Loft? - and is one better than the other or do they both work as good as each other , any caveats with either? *Diagrams not - no-where near - drawn to scale...

Switching from an ESI ESRTP4RF+ to a Drayton Wiser with a Worcester Combi boiler (single zone/one channel) The current wall plate wiring looks identical to the Drayton Wiser scheme, but just wanted to check if it would be plug n play. Attached photos of current wiring on wall plate. I...

Hi, May I seek advice? House/boiler is mid-90's. I am updating my froststat (it physically broke internally and has been firing up boiler inappropriately) and I have found that it is on a PERMANENT live feed (on voltage checking) despite the boiler switch overriding its effect, (ie fully...

Hi All, Having a couple of issues with the central heating which I want to clear up before the temperatures drop. I run the CH via a thermostat. It’s set for 18.5 degrees and in the day it runs absolutely fine, if it drops below, the flame symbol comes on on the thermostat and the boiler fires...

Hello there Can expert help me with the problem of unvented hot water( mega flow) with two expansion valves and pressure gauge losing pressure only during winter when I turn on the central heating. I have got gas boiler Worcester installed. I could see two radiators always have gas or no water...

Right so this is a long one so do bare with me ! Im not gas safe but i am a multiskilled engineer so have rough knowledge when it comes to heating and plumbing etc. So my radiator brackets was coming off my wall so today i valved off the rad and removed it from the wall and refixed the...

Hi all, I currently have a Y plan heating system that previously had a Hive dual channel system installed. I had Nest installed recently but it has been giving me problems so I wanted to revert back and as the old wiring was there, I thought it might be straight forward. The Hive receiver was...