thermostat change

Hi, I’m trying to update my old manual Honeywell T40 thermostat to a programmable T40 on a combi boiler. the man in the shop said nice easy swap but once I removed old I found there’s too many wires. I think the T4 only needs 2 but the old T40 has 4. Is it a simple problem to solve or do I...

Hello. I understand that this isn't an uncommon sort of question, I did search beforehand but I would appreciate advice on my specific scenario to be sure, please. My existing thermostat has 4 wires connected: Earth, Live, and 2 other wires. My new thermostat accepts 4 wires, but none of them...

I currently have this controlling my fully GasSafe installed WB Greenstar 30i... If I purchased this ... Is it possible to unpair my existing thermostat shown top right, and replace/pair with the new programmable thermostat shown bottom right. I understand there could be possible timer...

Hi all, we moved to a house that has underfloor heating with a thermostat for each room. This makes programming a nightmare as every thermostat has its own schedule, time settings etc. Are there any smart thermostats that can be used to replace all the thermostats (about 15 of them) and...

I’m trying to swap out the room thermostat in my gf’s flat. She’s got an old analogue thing and I wanted to replace it with a digital programmable one. I bought her the same type as I have at home, and wired it up the same way as I have at home. Nothing - completely dead. when I reconnect the...

Hi all, Just get someone to double check my research into the wiring as planning to move to Hive (single channel). I have a Worcester 28i junior boiler with BR1) receiver (wall mounted - picture 1&2) & remote thermostat (BPS242RF) which is not working hence the heating system but still have...

I have an old RTS1 thermostat with wires at N (blue) L(brown) and 3 (green). I wish to replace it with an ESRTP4 (NOT wireless). I assume that I should wire the Blue to 1, Green to 2 and Brown to 3 but I need some assurance. Can you help, please?