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Recent contents Top users
  1. J

    Ecotec Plus 831 turning on randomly

    Morning all, My Vallient Ecotec Plus 831 is stored in the loft and is connected to Hive. It is coming on randomly at various times of the day, but particularly middle of the night, and staying on until I manually turn the boiler off. Hive schedule is switched off but still comes on. Had an...
  2. W

    Vaillant ecoTec Plus 630 boiler not reaching target temp

    I recently had a new 2023 Vaillant ecoTec plus 630 (30kW) system boiler installed along with a Low Loss Header (LLH) in my house. I have 21 rads in the house and a room with UFH. The LLH was introduced as I was finding (before the LLH was fitted) that my old boiler (Vaillant heat-only boiler)...
    • windsor-tg
    • Thread
    • boiler ecotec plus vaillant
    • Replies: 10
    • Forum: Boilers
  3. T

    Vaillant eco plus 837 System loosing pressure.

    I have a Vaillant eco plus 837, year installed 2008. It works well. We have one large zone for the house with 13 rads running off it. We also have an UFH zone in the kitchen. Near the boiler I have 2 port valves which control this part of the system. The boiler has been loosing pressure...
  4. P

    Gledhill StainlessLITE Plus Horizontal 204 L Cylinder

    Hi All, I have recently changed heating source to a heat pump and so I have had a new water cylinder installed (different internal element required). This means that I have a 2.5 year old StainlessLITE Plus Horizontal unvented mains pressure 204L cylinder left over. We had it installed in Jan...
  5. B

    Problems with Worcester Greenstar HE Plus

    Started getting a random F7 fault on our gas boiler, called out a gas engineer to have a look at it. He gave it a good look over and checked and it was working while he was there. A few hours later the problem started up again, called the gas engineer who fitted a new main board, boiler was...
  6. Z

    Boiler Pressure Keeps increasing - Vaillant Ecotec Plus 838

    Hello everyone, I have a Vaillant Ecotec Plus 838. The issue i have is after the heating is switched on and then left it to cool over night i see the pressure has gone up. For example yesterday it was set at 1.3 heating was switched on and when it reached its temp it went upto 1.9 so no issues...
    • Zishan
    • Thread
    • boiler ecotec plus pressure vaillant
    • Replies: 19
    • Forum: Boilers
  7. Beshman

    Need new Thermostat for 2016 Ideal Logic Plus Combi 30

    I've got a 2016 Logic PLus Combi 30 and a Salus RT505TX RF Thermostat The thermostat seems to keep losing connection, no matter the placement. It can be next to the boiler or in the next room and it still not get a connection. Just a weird blackspot in the kitchen blocking it (could be the...
  8. B

    Vaillant TURBOMax Plus 828E - Partial Load Setting d.00 problems

    Hi, I have a TURBOMax Plus 828E in a small Annex that only has 3 Rads. The boiler Cycles but is only ignited for about 30-40 seconds before reaching target Temp and then goes on pump overrun. Given that there are only 3 Rads and are 'designer' with a total combined KW spec of about 2.5kw, the...
  9. P

    Hi all, how to convert to lpg the vaillant ecotec plus 618-2018

    Hi all, how to convert to lpg the vaillant ecotec plus 618-2018
  10. R

    Installing a new pump for Vaillant ecoTEC Plus 400 15kW. West London

    Removing pump and installing a new pump for Vaillant ecoTEC Plus 400 15kW Heat Only Boiler. Connecting the pump to the boiler and completing all wiring for the thermostat and consumer heating controller.
  11. E

    eco tec plus 831 boiler wont turn heating on - controller is dead

    I cannot turn my heating on. the CM921 controller is dead despite changing the batteries. can i turn the heating on via the boiler directly?
    • Evelyn
    • Thread
    • boiler heating plus
    • Replies: 2
    • Forum: Boilers
  12. boxer01

    VR33 Install on eco tec plus

    Hi I am new to this forum and would like some advice on fitting a vr33 open therm module on a vaillant ecotec plus controlled by a nest 3rd gen. It's a basic heating system with no hot water control. I am having difficulty finding an installation guide for the vr33, I have read that it plugs...
  13. M

    Valliant ecotec plus 415 hot water problem

    Basically, i have a hot water tank up in the loft when its summer the tank gets hot, and i have hot water from the taps. However during colder months i try and turn the water temp on the boiler to the max, i heat it up for 2 hours and it does nothing. However when the heating knob is turned up...
  14. A

    Vaillant Ecotec Plus Combi & UFH Control - V Smart Possible?

    Hi All Looking at having controls replaced / upgraded for a Vaillant Ecotect plus combi boiler. Currently have x2 zone valves on the heating (x1 for rads via a Honeywell wireless stat, and x1 for UFH circuits via Heatmiser stats - both wired to a Heatmiser wiring centre) I'm interested in...
  15. B

    Watchman Plus Reset even after batter change

    Watchman Plus plug monitor showing “r” so replaced 4 x AAA in power tube and measured 6.3V at connector. After switch on, monitor displays serial number then remains on “r”. I have carried out battery replacement before, with no problems. Any ideas where to look next? Cheers
  16. V

    Vaillant Ecotec plus 428 No heating

    Hi We've got a Vaillant ecotec plus 428 that doesn't seem to want to supply any heat to the radiators despite the hot water working just fine. Of some importance (I think) is that there is no radiator symbol displayed on the boiler screen, only a tap. We have a wireless thermostat (Altech...
  17. P

    Vaillant Ecotec plus 428 overactive. Keeps running in S7 and S8 mode.

    I have an open vented central heating system with a hot water tank. Both heating and hot water circuits have a motorised valve controlled by a timer. The timer for the central heating is always in the “on” position and is governed by a room thermostat. The boiler is a Vaillant Ecotec Plus 428...
  18. M

    Buffer Tank/Thermal Store addition to S Plan Plus & Unvented Cylinder?

    Hi sorry bit of an odd query here. With the increases in energy costs now and in the future we are trying to find any way to reduce our exposure (retired couple on fixed incomes). We are fortunate enough to have bought solar panels at the beginning of the year but as we head towards winter the...
  19. P

    Troubleshoot UFH PLUS radiator system

    Need a heating engineer in Central London I currently have an old worcester boiler. Since its original installation I've had many upgrades to my flat which now has 3 bathrooms and 7 zone underfloor heating plus 3 towel rail radiators. The greenstar I currently have is no longer sufficient...
  20. T

    Valiant Ecotech Plus 637 - Error F76

    A couple of weeks ago my Valiant Ecotech Plus 637 displayed Error F76. Boiler is 13 years old; serviced annually. I power cycled the boiler and it operated for ~10 days before hitting the same error again; I once again power cycled the boiler and it was in operation for ~24 hours before...
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