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ecotec

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  1. O

    Vaillant Ecotec 630 plus replacement

    I have a Vaillant Ecotec 630 Plus that was installed in 2007 that is connected to a 300 litre unvented tank. This provides our hot water and feeds 4 floors of underfloor heating. I am looking to replace both the boiler and tank and see they still produce this boiler. I assume the newest models...
  2. Scott_D

    Vaillant Ecotec Plus 46kw

    I have been asked to service one of these boilers 2 years old but I haven't dealt with one before. Is it just a big ecotec or different heat exchanger? Anything to look out for?
  3. N

    No hot water - Intermittent - ecoTec Plus

    Woke this morning to no hot water but heating was working fine. Checked the forums and checked all the common problems: Water and boiler pressure both ok Timer ok (hot water set to all day) No leaks and condenser pipe not frozen No error codes Tried running hot water with heating turned off...
  4. J

    Vaillant EcoTEC 831 issue

    Hi, looking for some help/advice if possible. Mum has a Vaillant EcTEC 831 ( VUW GB316/3-5 ) and the pump is constantly running. It was serviced in Sept when it started? Normally itwoulonly run when heating or hot water was required. I have managed to turn off the Comfot Mode but am unable to...
  5. J

    Valiant Ecotec Plus 938 A - Losing pressure (losing my mind!)

    Good afternoon. I am hoping someone may be able to help with an issue I have on a Valiant Ecotec Plus 938 boiler. Fitted approx 4 years ago, the boiler has been suffering from the loss of pressure on the system (down to 0) at least once a day, typically when it is not in use. I have so far; 1...
  6. S

    Vaillant Ecotec Plus 832 Expansion Vessel

    Hi Guys, Had a quick question regarding expansion vessel on a Vaillant Ecotec Plus 832. Was servicing the boiler and upon attaching hand pump to vessle after having drained the boiler, returns and flows isolated and drain off on boiler open, the vessle showed 1 bar charge. Was wondering why...
  7. S

    Valiant ecotec pro 24

    Anyone know why my diverter valve motor hardly moves have tryed a new one and still the same (Valiant ecotecpro 24)
  8. B

    Vaillant ecoTec plus 637 System boiler control options

    Vaillant ecoTec plus 637 and gledhill 250 indirect tank control options Hi, I am in the process of renovating an old farm house. I have been advised to have installed the Vaillant ecoTec plus 637 system boiler with a gledhill 250l indirect tank. I met with the heating engineers yesterday as...
    • Blondie44
    • Thread
    • boiler control ecotec plus system vaillant
    • Replies: 11
    • Forum: Boilers
  9. B

    Vaillant ecoTec plus 637 sensiocomfort control setup

    Vaillant ecoTec plus 637 and gledhill 250 indirect tank control options Hi, I am in the process of renovating an old farm house. I have been advised to have installed the Vaillant ecoTec plus 637 system boiler with a gledhill 250l indirect tank. I met with the heating engineers yesterday as...
  10. J

    F.22 Vaillant EcoTec Plus 630 - can't locate filling loop

    Hello - I have an f.22 error on this system boiler, 0.4 bars. Just moved into this house so not certain on how everything works. There are no taps under the boiler to add more water. There is a hot water cylinder in the cellar so thankfully it's just heating that we have lost. With this...
  11. Mark97

    Vaillant ecotec 615 help

    Hi. Boiler is a vaillant ecotec 615 unvented system boiler. I have changed the diverter valve plastic body (obviously no diverter valve in it). I had a tiny drip between this and the pump housing, so I have replaced this and replaced all seals around this and the pump. Upon running the boiler...
  12. S

    Vaillant EcoTec Plus 938 temperamental in heating mode

    Hello, we have a Vaillant EcoTec Plus 938 boiler and it started behaving when running in heating mode (hot water is fine - no problems with that). The problem is that quite often when there is demand for heat (either from one of Hive TRVs or from under floor heating thermostat) boiler starts...
  13. L

    Vaillant ecotec 831 F61 fault

    Just wondered if anybody could help me with this one....... or advise... Called out to an ecotec 831. fault code F61. The gas valve had been changed by a third party a week before... I checked the ignition electrodes and they were caked in sh*t. Cleaned and fired back up. Advised...
  14. P

    Replacing entire filling loop on Vaillant EcoTec Pro 28

    Hi all, I think has been discussed before but I don't think I've seen a clear answer. We have the Vaillant boiler as above and the filling loop has started to leak from around the olive joint on the cold water side. I would like to replace the whole loop, flexi, taps and the valves etc. I can...
  15. S

    Y plan with Vaillant Ecotec plus OV430

    Can Someone tell me how to wire the Vaillant ecotec OV430 with the Y Plan system. Does the orange from terminal 8 junction box go to the RT terminal on the boiler (room thermostat)
  16. D

    Vaillant ecoTEC plus 637 with Nest or maybe SensoHome

    Hi, A newbie here but need expert advice, I have installers who have started fitting the boiler (Vaillant ecoTEC plus 637) replacing an old water tank loft system and cylinder in the cupboard I'm also installing a horizontal megaflo (tempest) Okay, so they purchased the Valliant vsmart kit...
  17. J

    Which Inhibitor for Vaillant Ecotec ?

    Had system drained and replaced 3 rads. Just wanted to know is any inhibitor ok or does vaillant have a recommended brand?
  18. No More Heroes

    Vaillant Ecotec Pressure Too High

    I have a Vaillant Ecotec plus 637 boiler. The pressure is very high and pegged to the right - water is dripping out of the outside overflow through the Pressure Release Valve. An engineer has replaced the expansion vessel and checked the filling loop. The pressure gauge is still pegged. (Note...
  19. Z

    Vaillant Ecotec Diverter Valve Repair Cartridge

    I've seen some replacement cartridges for Vaillant Ecotec diverter valves, just the innards. Aftermarket stuff, not official, and I know you're supposed to use official parts and all that, but the diveter valves on Vaillants are probably the weakest part i'd say. Has anyone used them and had...
  20. V

    Ecotec plus 824..F28.

    Hi anyone. I have the F28 code on this unit. Gas IN is fine and on start up fires but within a second or two, the gas valve shuts. Taken the valve apart and the diaphram is ok,no splits. S code runs thru 1, 2 & 3 but will not progress to 4( burner ignited). Checked the low voltage solenoid and...
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