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honeywell

  1. M

    Honeywell Evohome - BDR91 issue

    Hello, I have just installed the Evohome Value Pack A which has 2 x BDR91 relays. One is commented to the electric supple to the oil boiler and the other controls the hot water valve. I have 8 x HR92's all connected and communicating fine with the Evotouch Controller. However I and having...
  2. J

    Replacing a Honeywell T40 thermostat with a Honeywell DT90e

    Hi I'm replacing my old dial thermostat with a digital The wires going in from left to right are Earth Blue 2x Black Brown When electrically tested none are live with thermostat off Research on this and other sites suggest 2x Black into B Brown into A Tie off and isolate Green/Yellow and Blue...
  3. gmartine

    Honeywell syncron motor replacement

    Is there a decent third party offering out there as OEM are pretty expensive?
  4. S

    Honeywell thermostat replacement

    I need to replace our Honeywell CM721, I believe the modern replacements would be either Honeywell T3R or T4R, is this correct and would the receiver also need replacing or would the T's mate up to my original Honeywell receiver?
  5. X

    Honeywell T6 wired back plate

    Hi. I'm looking for a wiring wall mount plate/ back plate for the Honeywell T6(wired version). Does anyone have one by any chance that is willing to give away or sell? Don't really want to by a whole new system just for the backplate. Thanks
  6. R

    Swapping a Danfoss valve for a Honeywell

    Kingo. Did you resolve your 3 port valveswop re wiring.
  7. T

    Replace 2-wire Honeywell CM707 zone stat

    Hello. I have a two-zone heating set up, with each zone controlled by a 2-port zone valve (Honeywell V4043H by the looks of it), and each zone has a two-wire HoneywellCM707. I would like to replace the CM707 in the master bedroom (for a mechanical stat that doesn;t click). In terms of...
    • Tractorman
    • Thread
    • honeywell replace stat
    • Replies: 2
    • Forum: UK Plumbers Forums
  8. J

    Honeywell Evohome HR92 valve control stopped working

    I have a Honeywell Evohome system that is in general working well but one of the HR92 radiator valves has suddenly stopped working just before Christmas The valve appears to be communicating with the controller but the valve was stuck open. It appears to be communicating with the controller but...
  9. E

    How long do honeywell two port motorised valves last?

    Ours are lasting between a year and two years and then I have to replace. Is this normal or should I be investigating our central heating system to find out why? Which motorised valves do you recommend I use?
  10. R

    honeywell ST9400c controller Timer query

    Hi I recently got this programmer installed during my new boiler (Worchester) installation. I am still getting use to it, however my query is I have very odd programmed times currently set. My 3rd timer slot is set 12pm-2.50am, yes we have our boiler heat the radiators while we go to bed and...
  11. O

    Honeywell T4R wireless range to boiler relay

    Hi all, we have a house with solid stone walls with a combi boiler serving it from a block built outbuilding next door. Currently there's a Siemens RDJ10 thermostat in the hall which is not much good as the temperature is very different in the open plan kitchen diner. I was thinking of...
  12. N

    Honeywell ST699 switching fault

    Honetwell St699, will switch on in once mode at desired time but won't switch off at desired time will just continue, any ideas would help greatly
  13. J

    Viessman vs Vaillant and Honeywell vs Tado vs Hive

    I am trying to help my dad decide with a boiler replacement, can't decide between Vaillant Ecotec Pro 30kw or Viessmann Vitodens 100 30kw. The boiler will be going in the exact same spot as before. Both will have a system cleanse, inhibitor and magnetic filter (I am not sure which brand or...
  14. T

    Honeywell normally open zone valve

    Interesting question and one I’ve never even thought about until I messed up today. This might be a bit long…. I’ve got a multi fuel system on the go, gravity primary’s for hot water off Rayburn, big biomass boiler, air source is involved for the floors , pumped heating split into 5 zones blah...
  15. M

    honeywell evohome to replace a cm 927

    our combi boiler has been controlled by a honeywell cm927 wireless thermostat. it has now packed up, and i was looking at getting the hive or nest, however i have now seen honeywell do the evohome, if i went this option would i need to wire in a new controller at the boiler? or would evohome...
  16. R

    Need help understanding Honeywell T4 thermostat optimisation

    I've tried to email Honeywell, but their web address is playing up and they aren't receiving. Unfortunately Honeywell is extremely poor at providing explanations even when I found the firm's online explanatory PDF that tried to explain what Honeywell means. Anyone had an answer that answers...
  17. F

    Honeywell 2 port zone valve not turning on

    There's power going to the valve head but the motor won't activate to turn the spindle to open the valve. The manual override will not activate the valve either. Should I replace the valve powered or Whole valve unit with pipe/spindle attached. My initial thinking the valve motor died and I...
  18. P

    Honeywell ST9100C set to 'off' but boiler still provides domestic hot water.

    Hello folks - first post here. Last week our faulty Honeywell ST6100C programmer was replaced by a ST9100C, this being the Honeywell-recommended replacement. Our regular heating engineer did the swap because the backplate was stuffed, so a simple DIY clip-on swap wasn't possible (by me at least...
  19. A

    URGENT No LED display on honeywell cm921 batteries all replaced & Checked. Ant thoughts pls

    No LED information on a Honeywell cm921. Batteries all changed & checked, any ideas pls. Can they be repaired or is it a new one required
  20. J

    Honeywell CM927 replacement

    I have a Vaillant eco plus 630, with hot water controlled by a Honeywell ST9100C and heating controlled by a Honeywell CM927installed around 8 years ago. The display is going on the CM927 (seems to be a common problem) so I am planning to get it replaced with the newer version Honeywell T4R and...

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