central heating

Hi all, Apologies in advance if I get any terminology incorrect. I moved into a house about a year ago with a system boiler. I've always lived in houses with a regular/conventional boiler system so I'm still getting my head around how a system boiler works. I'm looking at doing some...

Hi all, I need to replace a 3/4" union valve lockshield with a 1/2" on a bathroom heat leak radiator. Usually I bung the header tank, release pressure, and quickly swap the valves over. However, as its an old school heat leak setup I'm unsure if I need to adopt a different approach due to the...

I have two Honeywell 2-way motorised valves (1990 vintage) in my airing cupboard, one for CH and the other for hot water. The CH valve got stuck in the open position. I investigated best i could, took the cover off and managed to shift it by pushing gently in one of the brass cogs with a...

Hi, Mum had a new conventional central heating system fitted last year, all working superbly but I have a couple of questions. There is one Honeywell T4R wireless thermostat, and a Honeywell st9400c programmer in the airing cupboard. The hot water is set to 'Auto' on the programmer, and comes...

I had a new Worcester Bosch 28CDi boiler fitted in my flat recently. It works, but I've noticed a strange thing. Sometimes the gentle humming sound from (what I assume is) the pump fluctuates - the pitch rises and falls every 5 seconds or so. Is this normal? It's quite distracting (sounds like...

Hi all, Preface; checked and can't find this exact issue on here, but similar to this one where someone suggested 'plate heat exchanger needs cleaned /replaced'. Unlike them, however, the boiler was looked at pretty recently. Setup: -Vaillant Ecofit Pure 825 -Radiators all bled and flow...

Hi first time post, and appreciate some of the steps below that have already been taken are not standard procedure but I was wondering if anyone here had an interpretation or advice. Have a 3 storey house with a system boiler, 17 radiators in total fed by microbore pipe, with boiler (Ideal H24)...

Hi all, I've just bought a Drayton Multizone Smart Thermostat and 5 of their smart TRVs and looking for advice on the best way to set things up so had a few questions. Please let me know if you need to know anymore about the house and number of rooms to advise best. The boiler is a Main 30kw...

Hi folks, I’m facing an issue and I’d appreciate your help. I have a conventional (gravity fed) central heating system with a water tank in the loft, a hot water cylinder and a diverter valve in an airing cupboard. My issue concerns my bathroom radiator and when it gets hot. It’s like this...

I have a Potterton Powermax HE 85 boiler, which is about 15 years old. This morning I noticed the boiler was off so I checked the house electrics to make sure there was no trip switch activated - there wasn't. I am insured with Baxi who are visiting next Thursday to repair and do a service...

Hi All, Just hoping someone might have an idea on this. The boiler is running fine in terms of hot water but stopped running the Central Heating when called for from the Hive (It's sending a Live feed to the boiler from the Hive so thats all good.) We thought it might have been a PCB problem so...

Have recently moved into a new house and the radiator in our master bedroom clicks like hell when heating up and cooling down. Searched on here and tried everything below but nothings worked. I’ve traced the sound as best as I can, and whilst I can hear/feel it mostly from the TRV pipe side it’s...

I have a twist & lock 22mm Speedfit-type connector (though I think it's a generic brand) on the central heating system and it has sprung a small leak so wish to replace it with similar. I would grateful for comments on my plans to carry out the replacement. The gas central heating system is...

The furthest radiator from my boiler is a 160cm x 50cm Type 22 in my living room. It has always been set as the bypass, but this isn't ideal. The living room can overheat, whilst the kitchen is cold. The obvious answer would be to set a lower temperature on the TRV in the living room, but this...

Hi all, I moved into a new house earlier this year, so this is the first winter. The house is approx 25 years old and has the original (system) boiler with HW cylinder (serviced each year). When we first moved in we had plenty of HW. However, since winter has come along and we have had the...

Hi All, Need help please. I noticed the radiators upstairs were not getting hot and the top of the towel rail in the bathroom was cold. I bled the air out of all the radiators checking downstairs too and refilling water using the filling loop as i went. I got to having 1 bar system pressure...

Hi I live in a rental and only two of my radiators have TRV heads. There are valves with no heads I am hoping someone will recognise what they are and I can just buy a head and not a whole new valve If anyone can help that would be amazing

Hello! I have a new Vaillant boiler being installed and will install a new cylinder at the same time. Our installer is recommending a UK Cylinders ProLite Air twin coil solar indirect unvented cylinder 300ltr. According to specs the standing heat loss is 1.80 kWh/24h which seems pretty decent...

Hi all, I moved in to a new house earlier this summer which I believe has a system boiler (I'm used to a regular boiler in my old house). The HW is programmed to come on twice a day. This week (as I am sure a lot of people have :)) , the CH went on for the first time. I noticed that when the...

Hi All, Thank you for your time! FTB's - We're moving into a new property in 2-3 months time which currently has an old-style gas multipoint water heater and electric storage heaters, but no central heating. The property is a 1950-1960s end-of-terrace three bedroom, would there be any...