central heating

Hi all, This morning my boiler locked out with F22 (dry) and keeps locking out when reset for both HW and CH. I suspect it may be the pump as I cant hear it running anymore when the programmer switches on. The boiler still fires up but faults on F22. How can I check the pump and might it be...

Hi I've bought a Smiths HL1000 fan assisted radiator to fit into the kitchen. The combi boiler is also in the kitchen and the 22mm flow and return pipes are right there to tee off. The radiator has 15mm stub pipes in & out. It's like a plinth heater but goes up high on the wall. There's two...

I have air stuck in my hot water system which is characterised by a loud humming/vibrating noise coming from my hot water pump every 10-15 mins for about 3-4 mins at a time (presumeably as the pocket of air cycles around the system and hits the pump). I have tried bleeding all the radiators in...

Hi all, first post here and have tried to find some answers for my question but no joy. Moved into a house and needs some upgrading, including the boiler/radiators. Ideally I wanted a combi installed in the toilet downstairs to free space in the bathroom (our current system takes up about 1m sq...

Hello, Require some help and advice. Whenever I turn on my boiler for hot water or Central heating, the boiler turns off for a few minutes and then on again. This cycle repeats itself every 5minutes. I recently had my systems flushed with many of the radiators installed with TRVs as well as an...

Hi, I’ve recently moved into a new build house which has dual zone heating. The problem is the upstairs thermostat controls both the upstairs and downstairs radiators and the downstairs thermostat doesn’t seem to control anything! I’m wondering if something has been wired up wrong... the system...

Hi, I recently re-terminated my S-Plan central heating wiring into a new junction box to tidy things up and also to try to understand how it was wired originally before I moved into the property. I have created a diagram of the current wiring and even though the central heating is working...

After switching my consumer unit off temporarily to check a switch, my boiler (oil WB Greenstar Heatslave ii combi, only a few months old) won't come back on. The LCD is blank and the wireless thermostat had a Fault A21 which just means it can't find its friend. Any ideas? I've checked the FCU...

Hi, please see attached photos (blue: cold mains to boiler and kitchen after bathroom. Red: hot from boiler to bathroom. Yellow: gas to boiler. The other pipes are the radiator pipes that do run across under the pipes at the radiator ends - again too close to them) is this okay? I’m concerned...

For the last month my oil central heating only comes on sometimes, I’ve checked the water pump and it’s free can anybody give me a couple of checks to do as I have no idea, the fact that it comes on sometimes makes me think it might not be that serious

Hi, I have an issue with my boiler which consists of it making a hissing noise and pressure meter going up when the central heating is on. I haven't tested what happens when the pressure is extremely high as I turn it off before it goes above 3 bars. The central heating is not working but hot...

Hi all, I am in need of a little help... Boiler: Worcester Bosch RD532i Current Thermostat: TR2 Room Thermostat New Thermostat: BHT-6000 I want to fit the new thermostat to the boiler, but the wiring is very confusing and even though I have extensive knowledge of renovation, some wiring and...

I'm planning on updating our central heating system in the next few weeks and need some advice in regards to rewiring for the new central heating controller. We currently have an ancient Potterton EP2000 unit controlling the central heating and I'm looking to replace it with a Honeywell T6R-HW...

I'm getting the home heating system replaced. current setup is: https://www.diynot.com/diy/threads/too-many-boilers-for-the-22mm-pipe.511647/#post-4248767 post 9 It looks like we're going for: -a single gas boiler -unvented 3 zoned central heating -large area roof solar PV with excess...

Hi all, Just wondering if anyone knows if there is a way to call for central heating/turn central heating on without a thermostat? Reason is, I've had an electrician install a Nest for me but I'm pretty sure they've not done it correctly, as now the CH is not working - However I don't want to...

My old cast iron gas boiler with pump overrun needs a bypass, hitherto provided by one radiator with 15mm inlet and outlet pipes and 2 lockshield valves. My intention is to install smart TRVs on every radiator, which means I will need to install a bypass pipe immediately after the pump, between...

Solved. Hello. First time poster, happy to be torn to shreds if appropriate! I have recently moved house and found that the room thermostat was wildly inaccurate. It was a Horstmann HRT-2. I replaced this with a Drayton RTS-8. When I switched the heating power back on, the 3A central heating...

I'm only speculating as to what is actually happening here, it turns on and stays on for a few minutes, then it does this - clicks a bit, fan slows down, fan speeds up, clicks a bit, fan slows down, fan speeds up - does this a few times then cuts out. I was wondering if anyone else has ever...

I have a RT500RF thermostat and RT500RF(RX) receiver. All is working correctly but i think I'm getting interference from a neighbour. My receiver differs from the one in all the documentation (maybe its old?) and looks like this...

I have a danfoss hsa3 with 3 way valve. In the last month it has stopped functioning correctly. Now when CH is called only the motor winds, clicks the midway micro switch briefly then clicks back slightly past the switch turning it off again. If HW and CH are called then it’s both work. HW...