thermostats

  1. S

    Viessmann Central Heating Wiring

    Hi Folks, Looking for a bit of help here. We moved into our current house in 2018 and have always had a bit of an issue with the heating. The boiler is a Viessmann 200-W WB2B system boiler, and the central heating is split into the zones, each controlled by a thermostat. The boiler is plumbed...
  2. Tigerspirit

    How to uninstall Honeywell DT92E

    The thermostat is no longer working correctly as it puts the heating on regardless of what we set the temperature to and we want to uninstall it and return to using the boiler thermostat instead. How do we do this please?
  3. L

    Underfloor Heating: Replacement for WLTA-19 thermostats.

    Hi, can anyone recommend suitable replacements for WLTA-19 2-wire room thermostats? Two of mine have stopped working. OJ electronics no longer makes them, and they haven't been able to identify any replacements. The manual for my WLM Hydronic control system (also OJ, and also discontinued)...
  4. G

    WIFI room thermostat – have I done the cable bit correct?

    Good afternoon. I’m after some confirmation. Just changed over from an old rotating Honeywell room thermostat to a new WIFI digital one. It’s connected to my Potterton gas boiler via the switch unit underneath. (see pics). I’m aware that I have to leave the ‘CH’ slider to constant ‘ON’ to...
  5. A

    Hive installation- CH OFF wiring missing - Gravity Fed Y plan

    Hi everyone, new guy over here. I'm ok with electrical DIY, but plumbing (and central heating system) is not my strong side, so sorry in advance if I write something stupid. Now to the issue. I wanted to make my home a bit smarter, so I bought Hive Active Heating - Smart Hive Thermostat &...
  6. C

    Wiring Honeywell THR840DUK

    Hi, I need some help please... I want to replace an Drayton analogue thermostat with a Honeywell digital thermostat. The issue I have is I am not exactly sure of which way to wire it up, the Honeywell product states it a two wire product, but I have 3 wires (Red (live) Blue (neutral) and Yellow...
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