central heating

Hi. I have an old back boiler. The system has an F&E tank and a Grundfos pump. This week I turned on the heating for the first time of the winter and the boiler turns on but cuts out quickly. The pipe nearby gets hot, but none of the radiators do. Around 5 years ago, a Fernox Total Filter 1 was...

Hi, looking for some help/advice regarding my mums boiler. She has a Baxi Platinum 28 HE Boiler which is approx 5 years old with a hand held receiver(?) Salus RT305TX and a Salus RXRT505 which is wired up to the boiler and mounted on the wall to the side. Central heating hasn't been on the...

Hello I have installed the Drayton wiser hub r and have connected it to the dual digital thermostats. Whenever I increase the temp on the thermostats the little flame appears, and the LED for heating on the hub r lights up but the central heating on the boiler does not come on. We do not have a...

Hi, Have switched our hot water and central heating to our summer settings using Honeywell ST7100 and have found that the central heating is still coming on despite having set all settings instances not to. Effectively the central heating is coming on at the same time as the hot water is set to...

Hi all, I'm looking to reorganise some copper pipework to where a combi boiler will be installed. Planning to chase out a section of a conrete floor for the pipework and using fixing band instead of clips too so the chase doesn't have to be too wide or deep. My question is can all these pipes...

Hello everyone, Can someone please confirm if this (marked in red in both pictures) is the isolator valve? If so, will shutting this off will prevent water to flow to the 3 port valve connected below the pump (picture2)? We need to replace the 3 port valve body and need to know if we can do...

Ok so this is the third central heating actuator I've had to buy in 18 months. There's obviously something wrong with the valve. Checking it out it looks like the valve isn't turning in the same direction as the actuator or at least the slot the valve fits into is not in the same direction. Am...

Greetings all. I'm after a bit of advice as we have an issue with our HW kettling and on closer inspection the wiring on our 2-port Valves looks a little suspect to my untrained eye. Background: The house was built in 2001 and has an 'S' CH/HW System installed. If the HW is on and the CH is...

Hi guys, Hoping for a bit of advice as boiler has gone down with a 3 month baby in the house! Have a Vaillant Ecotec 418 has worked pretty solidly for 5 years. In Oct 2020 we had a sealed system fitted to improve water pressure and get rid of header tank in loft. Boiler copes absolutely...

Hi all, got the above boiler that was installed in the house back in 2009 before we moved in in 2017. The boiler works as it should, it heats up the hot water and the radiators fine and everything is balanced. however it has started to act rather strange with the heating on. The boiler will...

So we have a conventional boiler and CH system and recently (last week or so) I've noticed it getting worse at heating the downstairs radiators. For a bit of potentially useful background - In November I added a rad in our basement and balanced the system after that things were working mostly...

I recently installed a hive dual thermostat to work alongside my Worcester Greenstar 34Cdi classic. The water side of things works perfectly. Boiler fires up, hey presto. The heating however does not fire the boiler. The heating only works if the water is on as well. Anyone got any ideas. Please...

Where can I buy five core cable in which the conductors have the same colours as most central heating two-port zone valves (i.e. grey, orange, blue, brown, earth). Thus is so that I can re-route some cable runs. I know I could use five core with other colour schemes, and I can get plenty of...

Hi, I currently have 15mm copper ch pipes running along the wall feeding a radiator in a curved bay window. I'm getting a new curved rad. and would like to hide the pipes. Brick/block cavity external wall and solid concrete floor. Has anyone done this? And if so how? Thanks for reading.

Hey hey folks I’m hoping someone can help me out. I paid an electrician to come round and put in a new thermostat (hive) as part of a group of things I had done all at the same time. Only issue is that I can’t get the central heating to come on. When hive tries to switch on the heating.. I hear...

Hello, I have a central heating radiator that heats up nicely from top to bottom but it does not keep its heat. When boiler stops pumping hot water it turns cold very quickly. All other radiators in house are fine. Any ideas what the problem could be? Perhaps rusted up on inside so does not...

Hi, I have an old style back boiler and can't get my ch work. The dial on the thermostat is on maximum but heating comes on only when it's extremely cold. Hot water works ok. I'm thinking the thermostat could get dusty inside as we did some plastering but no changes after I cleaned it. I...

We have an open vented S-plan system with an old (but ultimately quite reliable) Ideal Classic NF50 gas boiler. This is one of those older systems where a small controller is in charge of the two zone valves, the pump and the power to the boiler. When one (or both) valves are open and the pump...

Hi, My flat has an old pumped central heating and gravity hot water system controlled by a Danfoss 103 electric-mechanical timeswitch. [Correction from ianmcd, below: It is not gravity HW. It is an open vent system with pumped HW]. No room thermostat. Hot water and heating cannot be switched...

I'm hoping someone can help. I don't know much about central heating systems. I've just installed a new boiler (Vaillant Ecotec 637) and new hot water cylinder. Previous system was vented whilst the new system is unvented. Problem I have is when the boiler cycles to heat the radiators I hear...