1. J

    Danfoss RMT230 or RMT230T room thermostat - technical question

    Hi Everyone, I have a Danfoss thermostat, unfortunately I am not sure of the specific type but I think it might be either an RMT 230 or RMT 230T. Photos attached. A door was heavily slammed several times on the thermostat during a rather crazy playtime. When I realised what was happening I...
  2. S

    Upgrading Danfoss controls to something smarter

    Hi, I'm new here, and I'm new to central heating, but I'm keen to learn. I'm still working my way around the house trying to understand the current setup, and how it works. My aim is to replace the 2 Danfoss controllers (and sensor) with a smart control setup, such as Wiser or Tado, or even...
  3. C

    3 port motorised valve should move 90 degrees or 180 degrees?

    Hi Following a faulty actuator on a Sunvic 3 port value SDMV2304, I was advised that a compatible replacement actuator is the Danfoss HSA3 (also backed up by http://www.seered.co.uk/sunvic_low_res_catalogue.pdf - see page 18). However the Danfoss HSA3 only seems moves the spindle through 90...
  4. K

    Need some help trying to wire a zigbee thermostat to a danfoss wiring center

    I am trying to swap a danfoss icon thermostat that connect to my wiring center to another that has zigbee support. I tried t wire it up but at first it seems to power up although when trying to put LOAD as in starting to heat the wiring center doesn't detect anything and is not opening the...
  5. Hamish McTavish

    Replacing a Danfoss FP715Si (TP9000) 2-channel CH/HW programmer

    Hi all, I currently have installed a Danfoss FP715Si (TP9000) 2-channel CH/HW programmer, but the factory-set clock is entirely wrong and it is just getting old. So it is time to replace it with something more modern. Ideally, I would like to be able to replace it with something that can reuse...
  6. R

    Replace Danfoss TP5000m with TPOne-M

    Hello, I'm looking to replace two Danfoss TP5000-m's with two TPOne-M's, and want to check the wiring. My system has a combi boiler with two heating zones (living room and rest of house) each controlled with a separate TP-5000M. The hot water is not controlled by the TP5000's. There is also...
  7. S

    Danfoss TP5000Si Programmable Room Thermostat

    I was hoping someone can tell me how to change the thermostat so we can programme six events per day instead of four? I have tried installer advanced programming but there isn't an option 40 when I scroll through. I would be very grateful for any ideas. I believe it's an old thermostat from...
  8. F


  9. C

    Danfoss heating control system (2)

    Hi all i have a danfoss heating controller if that’s the correct term. It controls my oil heating and thermostats for each zone, it also should engage the pump for my back boiler when it’s thermostat gets to temp but it doesn’t seem to be getting any power. I’ve disconnected central heating pump...
  10. K

    TP5000 to nest 3generation

    hello Team I know there is an old topic about the same thing but I'm not sure I understand can you tell me if when I change I have to connect the tp5000 the brown and black cables or it is in yellow regards
  11. M

    Danfoss TP2 Remote Sensor

    Does anyone know what's inside a Danfoss TP2 and what voltage it works at? My guess is that it's just a thermistor. Also wondering if the programmer supplies it with high/low voltage (dc or ac?) . I've used Arduinos for Internet control of various sensors in the home, so if I knew the...
  12. Giles266

    Hive dual channel multi zone wiring help

    Help! I'm trying to install Hive active heating 2 to replace my existing system but I'm not too sure on the wiring, I've found tons of guides and posts about this already but I'm not able to transfer the solutions to my setup. This damn wiring is starting to infiltrate my dreams so any help or...
  13. Mike15/19

    Lockout Worcester heatslave 15/19

    The problem is more burner related Worcester heatslave 15 19 oil boiler It is a bentone b9 burner made in 1999 With a danfoss bfp 21 l3 oil pump . The boiler will run fine with heating on but about 1 in every 3 or 4 times it goes to start up it will lock out , I will press the lockout button...
  14. D


    My FP715Si 230Vac programmer has died. I’m tempted to try another brand as the FP715Si has only lasted 2 months and Danfoss customer service was less than helpful. However, the easy option is to replace with the same unit then I won’t have to change the wall plate. Unless, of course, there are...
  15. T

    Replace Danfoss Randall 4033 with Tado Extension

    Hi, this is my first post, so pardon my ignorance. I've not been too long at this new bungalow for my parents, there is a Danfoss Randall 4033 timer for Hot Water and Heating (click the link for pictures: https://drive.google.com/drive/folders/1zECdyqCUI5sXfGqKD2XgW1zp8M-1zDLu?usp=sharing). It...
  16. Z

    Danfoss FP7898/FP715 to Hive Replacement

    Hey, Looking for some advice with fitting hive, replacing my Danfoss FP7898/FP715. I’ve pulled the programmer off and looked at the wiring and each connector has cables in apart from ports 1 and 2. I have a boiler with separate water tank so require the 2 channel hive. I’ve attached the photo...
  17. JK5599

    Why do I have 2 receivers??

    I hope someone can help, We have a Mitsubishi ground source heat pump system with a water cylinder with a Mitsubishi PAC-IF013B-E Unit on the front. Downstairs we have a wireless Danfoss TP500Si thermostat which talks to the Danfoss RX1 single channel receiver also attached to the unit. There is...
  18. Glenn Gooderham

    Danfoss RX1-S

    Does anybody know how to check a Danfoss RX1-S? I have a CET-2000B-RF with a CS2 Tank Sensor attached, it used to work fine in controlling the hot water The indication on the CET-2000B-Rf Transmitter (I have replaced the batteries in this unit) is showing wi-fi connected and calling for hot...
  19. SirMario

    Help Needed - Nest Thermostat replacing a Danfoss TP9000

    I have been spending a lot of time at home (due to the coronavirus epidemic), and I decided to take the plunge, learn something new and replaced my Danfoss TP9000 with a nest thermostat 3rd generation. After reading a lot of forum and posts online I was pretty confident that it would be easy...
  20. B

    Danfoss 102 to Hive Single Channel

    Hi all Bought myself an early Xmas pressie and will be swapping out an old Danfoss 102 with a single channel Hive. I’m no expert, so could I please ask for a logic check on the wiring. L / N / E & Common I’m ok with. It’s the black wire - Danfoss position #1 that I’m looking for - I think...