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  1. D

    Vaillant ecoTec Plus 418 D0 Setting

    Could anyone please provide an idiots guide how to change the D0 setting on my boiler. When I open the panel I'm faced with four buttons Bottom two + and - top two - -. That would be a great starting point. My D0 setting is apparently D00 (auto) and to cut a long story short, my boiler has...
  2. S

    Vaillant Ecotec Plus 824 problem

    Just serviced a Vaillant Ecotec Plus 824 and after putting all back together and filling up got some issues. The burner keeps modulating between high and low ever few seconds when running hot water. I checked the inlet pressure and all is within parameters per MI. Heating came on for few...
  3. E

    Vaillant ecoTEC plus 824 actuator motor cycling

    Hi, as title says the actuator motor keeps cycling and sounds like the gears slipping. The pump is running freely and the diverter valve is running free. I have seperated the motor from the diverter valve and extended the motor piston. On powering up the boiler the piston retracts but then goes...
  4. R

    vaillant ecotec pro 28 - water temp not hot enough

    HI, basically I have had the boiler for 5 years and its never been serviced but never had any problems and the rads water is very clean, when we first got the boiler the hot water temp was set at 55oc and the the shower and tap water was scorching hot but gradually the temp of water has got...
  5. D

    Vaillant ecoTec 418+ Taking Longer to Reach Desired Temp

    Have noticed over the last view days the process has slowed considerably. Normally, the boiler fires up soon after the room stat clicks in and it gets up to desired temp within a few minutes. Have noticed the boiler is much quieter when it does ignite (approx 10 mins after being switched on) and...
  6. M

    Vaillant ecotec 24 not responding

    Vaillant ecotec went off this evening, just noticed, no response, not turning on and no error code. tried replacing fuse in plug, turns on for less than a minute then dead again. have repeated with new fuse and does the same. Any ideas?? Plumber says maybe pcb, he can check in the morning...
  7. S

    Vaillant Ecotec 832 pressure rise with CH on

    Hi Guys, Needed bit of help on a Vaillant Ecotec 832 which has a pressure issue. The boiler pressure is rising when the CH was running. I have checked the expansion vessle static and charge is showing 1bar on my pump, which I believe means the vessle is good or best to still recharge again...
  8. K

    Ecotec plus losing water?

    Hi guys, any ideas on my pressure problem? Friends boiler keeps loosing pressure, went out today to check the usual suspects (expansion,prv,system leaks, heat exchanger) but didn't find any issues. stopped for a chat for about an hour and checked system pressure when boiler was up to temp - all...
  9. I

    Vaillant EcoTec 831 - How to configure for economy

    Apologies at start for long post but trying to give as much info as possible, Home - detached bungalow build 1989, cavity wall insulation, loft had extra in 2008, doubled glazed, 2 bedroom, 1 bathroom. Size is Width 35 feet, length 32 feet, room height 8ft. 7 Radiators installed 1995 plus 1...
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    New Boiler Stop/Start Loud Vibration - Valiant Ecotec Plus 615

    Hi all, Looking for some advice on a new Valiant Ecotec Plus 615 boiler, fitted a few weeks ago. It makes an on/off vibration shown in the video link below, and is loud enough for me to hear easily in the living room (I live in a 2 bedroom apartment and my boiler is in the bedroom). Our old...
    • Danny145
    • Thread
    • boiler ecotec new boiler plus
    • Replies: 6
    • Forum: Boilers
  11. C

    Ecotec plus boiler with VR66 gives code s97

    I have mounted a VR66 wiring centre in dual zone (switch in position 0) with two VRT350 thermostats. The heater is an Vaillant Ecotec Plus with combiboiler from october 2020. And I must say it works very well when one or both thermostats ask for heat. When there is no demand for heat the boiler...
    • coenvm
    • Thread
    • boiler ecotec plus
    • Replies: 2
    • Forum: Boilers
  12. A

    Valiant EcoTec plus 831 strange noise!

    Evening all, My EcoTec 831 has begun to make a strange noise, the plumber suggested bearings in the fan but it's intermittent and goes when rebooting. Can go a good week without it happening and HW and CH working fine. Any Ideas? Thanks in advance. Video is attached. Arron
  13. R

    Vaillant ecoTec Plus 831 Filling Loop End Caps

    Good morning all Vaillant ecoTec Plus 831 Filling Loop Can anyone recommend a pair of suitable end caps for the above? An Amazon or eBay link would be good. Thanks
  14. D

    Valiant ecotec 28 not working

    I’ve got a Honeywell st9100c and it fizzled and cut out yesterday no lcd screen working so changed it today and still no power in the boiler any suggestions please
  15. J

    vaillant ecotec pro 28 buzzing noise issue

    Hi, it sounds like a bee, happens intermittently with rads on only, goes off when you open hw tap Video - https://drive.google.com/file/d/1eGBfQHfTCeM7s8z51rV2yhXCyRC2AppK/view?usp=sharing Thanks
  16. C

    Vaillant EcoTec Pro comes on randomly

    Hello, I hope one of you good people can help. We have a Vaillant ecoTec Pro boiler, it's about six years old. Today, for the first time, it's started acting up. By that I mean it's heating the radiators even though the portable thermostat thing that sits down here shows that the temperature...
  17. T

    Vaillant EcoTec Pro 30 - Loud clicking noises every few mins after heating starts

    Our Vaillant EcoTec Pro 30 makes a loud clicking noise every few mins after the heating comes on. Eventually, after about 10-15mins it stops, but the weird thing is it also happens the same (clicks every 2-3 mins for 15 mins) after the heating is switched off. Here is an edited clip of the clip...
  18. E

    Vaillant EcoTec Pro not reaching set temperature

    Hello! We have 3 years old Vaillant boiler and recently we noticed that it's not reaching set temperature. I set the temp to 50 deg C, and then when we open the water, it starts burning and burns about 4-5 sec. then it stops. around 46 deg C. Water cools down a bit, then it starts burning again...
  19. B

    Vaillant EcoTec 630 - will only partially fire and won't heads the rads

    Morning all, I'm new and shiny here and seem to have developed a heating problem this morning. Any pointers for a quick resolution would be appreciated as my ears are now hurting! :rolleyes: I have a Vaillant Ecotec Plus 630 driving rads, hot water and underfloor heating in some of the house...
  20. J

    URGENT How do I attach hose to EcoTEC pro for low water pressure?

    Hi, I’ve got an EcoTEC pro boiler which is showing code F22 and therefore not turning on. Last night I accidentally turned it off at the mains and only realised this morning; I’m not sure if this is simple coincidence? I’ve done it before without problems following. I have an external hose to...
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