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danfoss

Danfoss is a Danish multinational company, based in Denmark, with more than 37,000 employees globally. Danfoss was founded in 1933 by engineer Mads Clausen.

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  1. E

    Danfoss HPA2 Actuator Stuck

    Hi everyone, my first post here so go easy on me... 😄 I have Danfoss HPA2 motorised valves fitted to my heating system and one of them is giving me problems again. Typical as its the same one I replaced in December 2022. The heating never came on today so I checked the valve and the lever on...
  2. A

    Danfoss tp9000 programmer

    hi could someone please tell me how a Danfoss tp9000 programmer with a remote sensor is wired to an existing s plan system?
  3. J

    Cant adjust Danfoss pressure am I using correct ports?

    I have a SIP space heater and fitted a new matching spec oil nozzle as part of a service on it. I wanted to check the pump pressure with the new nozzle and its difficult to be sure what port to connect to. And that these pumps are definitely adjustable! I turned an Allen screw which is not...
  4. M

    Danfoss ras-C2 angled thermostic tvr.

    Danfoss ras-C2 angled thermostic tvr. what way does the arrow face on the flow sde. It's pointing down the way on factory settings. Should it point upwards.
  5. T

    Danfoss HTS3 HW tank thermostat

    Hi, (Not a pro, just DIY) One of these worked OK for 18 years, but seemed to have gone faulty. Replaced it with same, twice in last 2years. Running on HW only in summer, the domestic water is either scalding or lukewarm. Tried temp settings over 50 & 60. I was thinking that the microswitch...
  6. M

    Boiler timer and thermostat

    Hi, I have moved to house that has an Ideal Logic combi c24 with a Danfoss RX1-S receiver and a RET2000B - RF thermostat. However, the mechanical timer on the boiler is not working so I can't program the boiler to turn on and off at different times. Therefore, I bought a TP5001RF programable...
  7. E

    I want to replace a Danfoss T6360B with Digital One?

    How to replace an old Danfoss T6360B manual thermostat with a digital one suggestions please?
  8. S

    Danfoss Lockshield valves leak after adjusting

    Heating system is 14 years old. On inspection I find that every lockshield valve is fully open. After adjusting some, I find that they weep slightly from the adjustment screw - valve type is as in attached picture, with only the adjustment screw behind the cap. Leak sealant is in the system - do...
  9. S

    Changing Danfoss HPA2 for Honeywell

    I have a Danfoss 2-port valve model HPA2 (which has suspect motor issue) I can get Honeywell 2-port valves & motors much cheaper & easier as local Trade place stocks Honeywell. Is there a direct equivalent Honeywell motor activator? ....... so I could just swap the synchronous motor over ? or...
  10. L

    Tp9000 won’t stop heating

    Hi, moved to the house with tp9000 controller with sensor downstairs and another thermostat in top bedroom. Normally all works ok , ch and hw works as per temperature set points. Once a week(random) downstairs controller will not turn off and heat all the time. No red lights are on so it does...
  11. P

    How to set Danfoss TP5000 temp upper limit

    I have recently moved into a house with a Danfoss TP5000 remote boiler control panel. It seems to be working just fine other than I can only go up to a max temp of 16. The manual says there is a temperature upper limit setting but this is behind the installer advanced settings. The manual...
  12. G

    Danfoss TP9000 heating not turning off

    Hi all, I moved into my house a few months ago and have finally decided to put the heating on. I have the Danfoss TP9000 in the downstairs bathroom and I have wanted to set it according to my working hours. Today I have used the 6 setting thingy thought I had it right but clearly not. The...
  13. F

    Why can't I get Upstairs radiators to work independently

    Hi, wonder if anyone can give some advice. Recently moved into a new property. It has external OIL combi boiler which is new and works well. Downstairs has underfloor heating - which works well. Upstairs has wall radiators - which work well - but ONLY if the downstairs thermometer is calling for...
  14. G

    Danfoss odd noise coming deom

    Hiya, any help would be great. I have recently moved into a new house (4 days ago) and only notice an odd noise the last 2 days. Managed to track it down and it’s coming from a the Danfoss dual units (specifically not the one by the wall). Any help with it would be great as it doesn’t sound...
  15. T

    How to pair a Danfoss TP5000 si thermostat

    Which buttons do I press to pair a wireless Danfoss TP5000 si thermostat with its receiver? The receiver is a Danfoss RX1, with a PROG button and a CH1 button. The manual doesn't mention pairing.
  16. S

    How to remove Danfoss TRV

    Hi all, Hope you are all well. I am trying to remove this Danfoss TRV, but struggling to work it out. I assume I need to turn the grey collar, but don't want to mess too much, unless certain. Thanks
  17. bunkotungus

    Boiler receiver wiring - Danfoss RX1

    It used to work. But the wire got tugged and pulled all the connectors out (except the grey one, that's still in the correct place). I tried to wire it up again in the below pic but the hot water isn't coming on. Boiler is a Grant Vortex Pro External 26kW oil combi. Since the below pics have...
  18. J

    Danfoss discontinued soft starter advice!

    I’m trying to find an alternative or replacement for a Danfoss heat pump soft starter unit. The part number is 037n0086 - any ideas?!
  19. M

    Danfoss nozzle patterns

    Hi guys, I'm relatively new to oil and have a question regarding S/ES and H/EH nozzle patterns. I know that the ES/EH are specifically for kerosene but otherwise it appears that an S and ES are interchangeable. This has me wondering if its necessary to carry both, as it seems pointless to be...
  20. R

    Faulty Danfoss HPA2 zone valves

    Hi, Seems like both my upstairs and downstairs HPA2 zone valves are on the blink. Every other day one of them doesn't switch off at the thermostat cut off temp and I come home to the Bahamas 😅. Firstly, is it worth trying to repair them or is the fix only likely to last a short time before...
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