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  1. siricosm

    Programmable digital cylinder stat

    I bought one of these: and I am using it to control the temperature of my hot tub, and it works great. Does anyone know of a device like this that does not use plugs but rather can be wired in? I am looking for something to control my cylinder, that can be programmed down at night with the...
  2. J

    Cotherm GTLH3161 Cylinder Stat

    What is/should be the switching differential in the above, installed in a Heatrae Sadia unvented HW Cylinder, set to 60C. Can't find anything in the spec sheet re this.
  3. Inverness

    Frost stat and pipe stat boiler inside garage

    New built home. Has a combi on a 2 heating zones. The issue boiler located inside garage has a frost stat and a status ct100 pipe stat. The boiler is running through the night and the radiator on the 2nd zone that room is roasting hot. Any suggestions? The pipe stat is on 40 degrees can this...
  4. H

    Overheat stat on Grant boiler

    Following on from my question about monitoring F & R temperatures, I needed a measuring device because the overheat stat. frequently trips and then needs to be reset. It normally happens when the boiler has switched off and is no doubt due to the hot water rising to the top of the boiler, but I...
  5. G

    Faulty Immersion element stat?

    I have just had a new boiler and 210 ltr unvented tank fitted in the loft to replace a very old Baxi back boiler. I have now fitted a Solic 200 diverter to utilise all the spare capacity from the 3,84 Kw Pv system on the roof. This has only just become an option as the old existing tank did not...
  6. D

    Potterton Prime Overheat Stat

    Evening all. Can anyone help me with a bit of advice. We “inherited“ a Potterton Prima 60F boiler (which we were told in 2013 was 3/4 years old). It turns out after checking Serial number with Potterton that it was manufactured in 2003. Had it regularly serviced but a few weeks ago it failed...
  7. R

    "High" stat temperature on Thorn Apollo 30/50B?

    Hi, Am trying to understand my mother's Apollo boiler. It has an intermittent fault. In the last couple of years, it has had a new thermocouple, a new "low" stat, and a new pump over-run switch. The RGI was not throwing parts at it, and the replacement of these has solved some problems: I...
  8. C

    Programmer fault/wireless stat wiring?

    Hi guys, I have a fault on a clients heating system whereby the heating will stay on regardless of what the programmer is doing on its timed function, it'll switch off at the programmer (no light) but boiler will stay on until they turn the stat down, I went and looked at it, they said they...
  9. N

    Pipe stat not effective?

    I have a ideal logic max boiler ( installed in Nov 2021) in the garage, water tank and pump in airing cupboard in the house. I have a frost stat in the garage set at 5c and a pipe stat on the return pipe to the boiler set at 10c. So can anyone explain why my radiators are still heating up on...
  10. A

    Boiler weather comp being controlled with a optimising room stat

    Evening chaps. As the title says, can a boiler with weather comp run with an optimising room stat? I have a Glowworm Flexicom 35cx that can accept an external (outside) sensor, and the main controls is a Honeywell CMT927 optimising room stat. Reason I ask is I think they will fight each other as...
  11. D

    Frost Stat replacement?

    My boiler suddenly seems to come on at random times for a few minutes throughout the day and night. It is a Potterton Suprima in garage. I suspect the Honeywell Frost Stat has become faulty, it doesn't currently seem cold enough for the frost stat to kick in. I'm guessing the pipe stat is...
  12. D

    Whats this stat for?

    Having a few problems with my Mistral oil fired system but seem to be getting on top of it now. Can anyone tell me what this stat is for located in the garage by the boiler. It seems to be set at 21f or -6c ? What use could that be? Couldn't see how to attach an image but its a basic old dial...
  13. T

    Ideal Logic+ 30 combi - timer or room stat off

    I have an Ideal Logic+ 30 combi boiler which was running fine up until a power cut earlier today. Now it's stuck saying "timer or room stat off" whilst in Winter mode and the central heating won't come on unless manually triggered by the thermostat by increasing the temp. I've tested the...
  14. B

    24i rsf-L help with room stat

    Hi I have a worcester 24i rsf-L combi It has got a mechanical timer on it with no room stat I want to put on a programmable room stat Which one would be okay to go on this boiler? Also I have looked at the boiler where the connection is and it says take the link out BUT I cannot see any link...
  15. J

    A pipe stat is needed?

    Hi, I have a newly installed boiler which has built-in frost protection, when the installer installed this boiler, they did not disconnect the old external frost stat which is still wired to the boiler. I assume no newly installed boiler is still wired with old external frost stat, right? So I...
  16. hammers4spanner

    Baxi platinum boiler stat knob

    Not doing so much work these days but came across a platinum where the boiler heating stat was on full. Yet I noticed on max the boiler stat was only reading 30 on full . Owner had thought it wasn't getting that hot at the rads. I always recalled the boiler stat could be turned on max and red...
  17. J

    External frost stat is in action or not doing anything?

    Hi, I have an external frost stat which I am not sure if it is in use or not. I had an electrician opened it and checked it, he said it is live. But he is not sure if it is in action or not.... I took a photo, could anyone confirm as the position it is, is this frost stat in action i.e. will...
  18. 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
  19. S

    Potterton 80el Overheat stat keeps tripping

    Hi Guys, Have a customer who has a Potterton 80el and when running heating after a few hours the red overheat stat button at the bottom of the boiler pushes out and boiler wont fire up. Customer has said if they reset the button they heating could work for a few hours or for the whole day...
  20. stings27

    Viessmann rf stat problem

    Hi all. Recently moved house and have a viesssmann vitotrol 100 UTD-RF stat. I have looked thro the operating instructions and to be honest, it might as well have been written in Chinese. Can anyone tell me if you can completely reset it so as I can put my own program in it ? (P3) When you...

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