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vaillant

  1. M

    Vaillant filling loop leak

    Afternoon all, My boiler pressure is slowly rising above green every other week and I've located the leak to be the check valves on both sides of the filling loop. Is there anyway I can cap one side off untill I can buy a new part? Furlough has made it hard financially atm. I've included a...
  2. P

    Help me understand my Vaillant boiler!

    Hi All, The house we moved in to a year ago has a Vaillant Ecotec 428 fitted and I'm trying to get my head around how it works. This is my first time as a home owner and never lived in a property in which I've had access to the boiler until now, so trying to get my knowledge to where it should...
  3. D

    URGENT Vaillant 824E 50p model

    I’m after installation service manual for vaillant Ecomax 824 E ( 50p model ) gc 47 044 07 tried Vaillant they don’t have copy can’t find on line or on my many downloads davidfal
  4. G

    Vaillant ecoTEC Plus 938 - Low Flow Rate

    Hi guys. Hope you are able to help me, and thank you in advance for anyone who can contribute. I've got a Vaillant 938 and notice that the hot water output isn't near the claimed flow. I've tested the pressure at the stop cock and it's around 3 bar. I've tested the cold flow rate from the...
  5. P

    Vaillant Ecotec vertical flue minimum distance from soil pipe

    Hi All Has anyone ever questioned the reasons why Vaillant MIs for their vertical flue termination refer to damp exhaust air escapes from “channel vents” may condense in the air pipe and cause damage to the product, this would suggest that the flue terminal has to be at least 1 meter away on...
  6. J

    Vaillant Ecotec Plus 824 F75 fault

    Hello Our Vaillant boiler has developed a fault in the last 2 weeks. The hot water is working without any problems. However, within 15-20 minutes of turning the heating on we are getting the error message 'F.75 Fault. Pump water shortage'. The boiler being on for heating is pushing the filling...
  7. K

    Vaillant ecotec 937 noise

    Hello all, My 1st post, here goes My boiler has developed a funny noise that can only be described as like when you finish a drink through a straw and suck up the last bit from the bottom.. that noise? The noise is coming from underneath the boiler and only does this when the hot water tap is...
  8. G

    Vaillant condensate into washing machine stand pipe

    hi, i have a 40mm boss connection at the top of a horizontal soil stack that runs in the room. I'm intending to put a washing machine stand pipe at the end of this. I also have a Vaillant ecotec pro 28 boiler next to where the washing machine will sit and was hoping to get the 'Registered Professional Gas Engineer' to reroute...
  9. B

    Servicing for Arotherm Vaillant 15KW Air Source Heat Pump (ASHP)

    Moved into a new property around 4 years ago with full 15Kw Vaillant Arotherm ASHP setup, after quite a few initial teething problems seems to run well over last couple of years. Long term just wondering if anyone can advise on servicing (in Berkshire area). Are there any independent specialist...
  10. R

    Vaillant Eco Tec Pro 28 fault.

    Over the last couple of weeks my boiler has started to throw the occasional S.54 and F.64 codes. I know when its happened because the hot taps run cold. The whole system is 8 years old and has been serviced every other year. Normal service is resumed by pressing the reset button. The question is...
  11. C

    Vaillant ecotec pressure dropping

    Hi folks, hopefully someone can help as this problem is doing my head in. Sorry for the long story but just want to fill in on what’s going on. Father in-laws boiler was dropping pressure with no sign of leaks on system. I checked expansion vessel and it had lost charge so must’ve been...
  12. G

    Vaillant ecoTEC plus 618.

    I have a become aware that the boiler seems to be cycling. I have 2 zones with a programmer in the hall and one on the landing. Once the desired temperature has been reached I have noticed on the boiler panel, that when the temp drops to about 45C the boiler fires up and then when it gets to...
  13. G

    Vaillant EcoTec Plus

    Hi Everyone. I am hoping that someone could help me with a problem I have with a Vaillant Eco Tec Plus, that was fitted last year in March. When it was first fitted I noticed that it took more than 30 minutes for our radiators, to get warm, our old boiler would heat it in about 10 minutes. I...
  14. J

    Vaillant eco tec 28 f28

    Hello hope someone can help. So this morning woke up to a f28 on my Vaillant eco tec pro 28.so did the usual things checked standing pressure and working pressure by three rings on the hob all good.just to be safe called cadent to check the regulator to make sure nothing was wrong on that side...
  15. Z

    Will a Vaillant 150 Timeswitch fit and older Ecotec?

    I've got an older Vaillant Ecotec combi with a 130 Timeswitch that's broken, can the newer 150 timeswitch be used on it rather than paying over the odds for a 130? I know you can put the pins in a couple of different positions but can't remember if it fits the older ones or not. Thanks in advance
  16. kenjiru

    Thermostat for Vaillant ecoCOMPACT

    Hello guys, I have a Vaillant ecoCOMPACT VSC 206/4-5 90 boiler with an multiMATIC 700 module already installed. I've recently converted the house from radiator heating to under floor heating. What's the best solution to add a wireless thermostat to it? I've looked at the following solutions...
  17. King Mustard

    Vaillant TURBOmax VUW boiler making "cracking" sound

    We started renting a house nine months ago. The house is just over 20 years old and has a Vaillant TURBOmax VUW boiler. The boiler seems quite old so may have been installed with the house? It's regularly serviced but, as of two weeks ago, it started making a "cracking" sound most of the time...
  18. K

    Vaillant ecotect pro 28 boiler droning noise - video

    recently the boiler has started the noise as in the videos. No idea where to start from. The boiler is used rarely, but for a while the top up valves where open which meant the pressure was always high when the boiler was on, this was fixed but the has started a while after the valve was turned...
  19. 5

    Vaillant 838 operations

    Fitted a Vaillant 838 Eco Tech plus combination boiler to a property 6 weeks ago. all fine. Customer called in to say that the boiler had locked out on F54 and F28. Reset did it again a few hours later, then been fine since. I attended today to check a few thing:- 1. Gas pressure at the meter...
  20. P

    Vaillant boiler noise

    Got a vaillant ecotec boiler and it makes an awful noise sometimes which stops when the hot water tap is turned on, boiler is fully serviced and clean, couldn’t get it to replicate for the last service so the engineer couldn’t find anything wrong!

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