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ecotec

  1. S

    Vaillant ecoTEC Pro 28 changing AAV

    My AAV is leaking, it is the type with an o ring around the body that is fixed in to the pump with the u shaped pin. I know that other types have a shut of valve allowing the part to be changed without draining the system, I'm thinking mine will need draining to change it? Could anyone advise...
  2. sammathias

    Vaillant ecotec pro 28 HOT water too hot.

    Routine service today on an ecotec pro 28. Everything went fine but i noticed the customer had his hot water set at 40 degrees on the boiler...but when running the hot tap it was coming out at 69 degrees..even in p.01. i looked at the diagnostic codes and D.003 was set at -99 degrees and D.006...
  3. R

    Vaillant ecotec green iq 843 or unvented?

    Hello all. ..first post so please forgive the lack of technical knowledge. I'm looking at replacing an old potterton 100e regular boiler connected to a unvented traditional system. Can't decide between the above high powered combi or going unvented with a ecotec 637 system boiler and 210...
    • robwelsh458
    • Thread
    • ecotec unvented vaillant
    • Replies: 20
    • Forum: UK Plumbers Forums
  4. P

    Ecotec 637 System Boiler - Is this correct behaviour?

    Hi everybody, I have just had an Ecotec 637 system boiler with Unistor 300 tank installed. These are controlled using the Evohome system although I haven't yet bought the TRV heads so it is just working as a single thermostat control. Everything is working correctly in that the thermostat is...
  5. S

    Vaillant ecotec plus

    Didn't have boiler manual fault code is S97 Water sensor ? Hot water is warm and not hot Heating is ok
  6. phil hair

    vaillant ecotec pro 28 diverter valve

    hi, does anybody know if i have to replace the whole cartridge or just change the o'rings on the original cartridge for the vaillant ecotec pro 28. if i can get away with the o'rings do you know what size they are? many thanks............phil
  7. Y

    Vaillant ecotec 624 slowly losing pressure

    Hi All My Vaillant 624 has been slowly losing pressure over 2 weeks. I filled up to 1.5 bars. when the heating turned on it increased to 2.0 bars. I then noticed over a period of 2 weeks or so it has slowly dropped to 0.9 bars. There is no obvious leaks around the radiator pipes. I bled all...
  8. Y

    Vaillant ecotec 624 loses pressure slowly

    Hi All My Vaillant 624 has been slowly losing pressure over 2 weeks. I filled up to 1.5 bars. when the heating turned on it increased to 2.0 bars. I then noticed over a perios of 2 weeks or so it has slowly dropped to 0.9 bars. There is no obvious leaks around the radiator pipes. I bled all...
  9. A

    Vaillant ecotec plus installed and one freezing radiator

    Good morning, Can someone help me please? I've had my kitchen extended and was advised by my builder to buy a Vaillant ecotec plus boiler as it would be able to accomodate at least 20 radiators (I now have 7 and a heated towel rail). The plumber came in and attached a hose pipe to the radiator...
    • And3
    • Thread
    • ecotec plus radiator vaillant
    • Replies: 15
    • Forum: UK Plumbers Forums
  10. F

    Vaillant Ecotec Pro 28 F28 Fault Code

    Hi, have been out to look at this earlier today. Boiler won't even go through ignition sequence..... Have checked gas supply etc. Boiler is approx. 2 years old and has apparently played up from day 1 with this fault code. Tenant usually presses reset a few times and then fires up. They have a...
  11. V

    Valiant Ecotec Pro 24 F75 Fault

    Been having problems with the pressure in my boiler for months now, it dropped at least once a day and I was constantly adding pressure to get the heating and hot water on. Then came the F75 fault, the manual diagnosed water pressure sensor, pump defective, air in the heating system or too...
  12. C

    Vaillant ecoTEC pro 24 - New PCB, F70, can't enter menu to enter #7 DSN ?

    Hi all I've just had a friend who is GS reg drop over and fit a new PCB for me due to an intermittent fault with the old. He told me it would throw up a fault code as I drove him to Heathrow to catch his flight that he was late for. I don't have a manual and can't seem to find the correct one...
  13. B

    Vaillant ecotec flue bend

    Any Vaillant guys on here? need a flue elbow for a 6 year old ecotec,will part number 303910 fit?Leo?
    • Billy Bob Bob
    • Thread
    • ecotec flue vaillant
    • Replies: 1
    • Forum: UK Plumbers Forums
  14. I

    Vaillant ecoTec 831 Plus and Nest - Flow Temperature

    So, recently had the Vaillant 350f thermostat replaced with a Nest and I'm left with a problem I can't wrap my head around. Boiler is Vaillant ecoTec 831 Plus and is only a couple of years old. With the Vaillant thermostat, the flow temperature would vary based on room temp vs set temp, but...
    • icezebra
    • Thread
    • ecotec flow plus vaillant
    • Replies: 30
    • Forum: UK Plumbers Forums
  15. J

    Vaillant ecotec plus 824 r1

    I have a few questions regarding common issues on the 824 r1 Expansion v flat so re charged n holding Flow hot n returns good It has the rubber hose at both rear ends Is the vaillant with main heat exchanger issues and was there a fix for the rubber hose or is this down to the owner as they...
  16. E

    Vaillant ecoTEC plus 831 gc 47.044.32

    F .61 fault says poss gas valve control faulty amongst other things any advice on most common problem please
  17. P

    Vaillant Ecotec - F01 & F04 faults

    Hi Guys, I have had a couple of people with the ignition fault codes showing up on Vaillant system and open-vent boilers one was repaired under warranty but the other is on the older ecotec open-vent boiler. My question is what do i need to look for if the ignition probes & leads are fine...
  18. D

    Third Generation Nest Heat Link installation to a Vaillant Ecotec Pro 30

    All, I know there are a lot of threads on this forum, on a number of other forums and also videos on YouTube but I have found little information on this specific install and the information I have found has been confusing and sometimes contradictory. I have just had a Vaillant Ecotec Pro 30...
  19. K

    Vaillant Ecotec F.75

    Got to go to one of these tomorrow and can't for the life of me remember what it was last time round but took ages I recall. Any pointers gents? Cheers
  20. jaydebruyne

    Ecotec Plus 824 combi

    How do the side panels come off? Sorry for stupid question! Just don't look like they do but I thought they did

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