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ecotec plus 837

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  1. D

    Understanding DHW Cirulation

    Hi All, I trying to understand some settings or the way circulation pumps work. I recently had my Vaillant ecoTEC plus 637 fitted in my loft with a megaflo tempest tank. To control it all I'm using a sesoComfort wifi device or the app. Now there are settings for planning CH and DHW. There is...
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    Vaillant ecoTEC plus 837 R1 with persisting F75 fault

    Can someone help diagnose Vaillant ecoTEC plus 837 with persisting F75 fault please? We already replaced the pressure sensor, installed F75 kit, replaced the main heat exchanger, and the pump, and the PCB, and flushed the system and installed a filter on the return, but still sometimes we get...
  3. R

    Valliant ecotec plus 837 boiler leak

    Hi, This boiler leaks from a leak off pipe attached to the siphonic condensing trap. This leak (drip) only occurs when heating switched on. The expansion unit was faulty which i have replaced. The trap was dirty and over filled which i have cleaned and filled to correct level. There is a smaller...
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    Valliant ecotec plus 837 losing pressure

    Valliant ecotec plus 837 losing pressure every few days. Boiler in loft with flue venting outside to house apex. Boiler 2 years old. Forgot to look at error message this morning so unsure of error message but when filled from two taps underneath it can last 2-3 days without losing pressure...
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    Noisy Circ Pump on Vaillant ecoTEC plus 837

    ​​I've started to get an occasional knocking noise from circ pump, my first thoughts was air in the system. Been round and bled system (no air to speak of). When it happens the knocking noise builds up then dissipates and then runs perfectly OK, while this is happening the pressure gauge is...
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    Vailant ecotec plus 837 - Water Pressure (and Temp) Seems to High at c.3.3 Bar

    Hello Boiler is functioning ok but when I happened to open and check the dials/readings I noticed that when the heating is switched on the pressure rises to c.3.3 Bar (dial goes into the top red zone) and the temperature rises to about 74 degrees. Once the heating goes off the pressure dial...
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    Valliant Ecotec Plus 837 combi boiler or intergas combi

    Was about to buy a valliant ecotec 837 for my house. But after reading some of you guys views on the intergas i am re-thinking. Are they really as good as there made out to be?
  8. B

    Vaillant EcoTec Plus 837 programmer??

    fitted a 837 plus and customer wanted to use his old programmer. one of those British Gas UT1. he never used the room stat. anyway left with 3 core cable at the boiler. connected live to common, S/L to RT connection on PCB and removed the 24v link. but cant get it to fire heating. got 240v at...
  9. M

    Vaillant Ecotec Plus 837

    Hi guys, just after some advice, iv got a 2008 Vaillant Ecotec Plus 837 that fine but its coming off the wall to be moved to another part of the room, I'm moving it next week (got GS guy doing the gas & flue im doing everything else) iv been told that the 2 rubber hoses are common to split on...
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    vaillant ecotec plus 837 rapid pressure loss

    I have had my vaillant for 5 years. It was serviced after first year and again this year . For the past month i have had to top pressure up at least once a week. This last week i have done it daily. After i had it serviced last week, the engineer said i must have a leak beneath ground level...
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    Valiant Ecotec plus 837 pressure help

    Hi guys got a new system fitted in January from scratch including all new pipes . The system was filled to 1.2 bar , I had to go into cellar (boiler here) to switch off the switch as power company was replacing our meter I noticed the bar flashing at 0.8 -- heating was off. I have checked...
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    Valient Ecotec Plus 837

    Hello, I wonder if anyone can help. We have an excellent Valient ecotec plus 837 boiler controlled by a Honeywell wireless programmable thermostat controller. The system at the moment seems very noisy, principle problem is when it is turned to manual and the target temperature is set at 23C the...
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    Filling loop and topping up probs on Vaillant ecotec plus 837

    Cannot get mains water to flow into system using filling loop. Filling loop connected, both stop valves open and only about 0.9bar in the system but mains water (plenty of mains pressure) will not flow into the system. I have uncoupled the filling loop at the stop valve (at the other end to...
  14. M

    rattling noise from a vaillant ecotec plus 837

    Been to a vaillant ecotec plus 837 today that has a rattleing noise coming from somewhere inside the boiler....i think it may be the pump but cant be definate. Not really familiar with working on these and wondered if anyone out there has a method for finding annoying rattleing noises or if...
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    Wireless/Wired room thermostat and heating timer?

    Hii getting a new boiler fitted in a few days, and since the boiler is situated at the back of the house i dont really want are wires in the way for the thermostat so i want a wireless one that can control the heating as well as a thermostat. The boiler i will be getting is the Vaillant ecotec...
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    New boiler

    Hi, ok i am going to go for a Vaillant ecotec plus 837, had a plumber out today to quote me for the job. He recommended not to get Vaillant as the parts are plastic and break after a while he recommended me to get a "Intergas Combi Compact" did not state what model number as he didnt knw. He...
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    What is cheaper to run Vaillant ecotec plus 837 or 937

    Hi guys just want to know what is cheaper to run vaillant eco tec plus 837 or 937? Thankss
  18. B

    Questions about Vaillant ecoTEC Plus 837

    We have a VRC430 Weather Compensator control panel installed on our Vaillant ecoTEC Plus 837 boiler and also have a VR81 remote control unit installed in the living room. 1. What is the relationship and interaction between the programmed times for heating and hot water, and the two big control...
  19. D

    837 Eco tech plus

    Can anyone tell me how many draw off points a combi can supply? & how to work this out by using volume & flow rates? Cheers!
  20. A

    Confused

    I am just about to move into a 3 bed semi bungalow.It has a back boiler which needs removing and six rads so far i've had three plumbers over to give me a quote,two suggested a vaillant and the other prefered glow worm,but i gather they are much the same.Condensing boiler seems to be the...
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