Hey, I recently installed a Vaillant Home Combi 35. The Fix: You may have to wait for the condensate to defrost. The needle has dropped back into the mid point of the grey section. I have to refire it with the switch. So if this is your boilers first rodeo – relax. A few weeks on l’ve noticed water leaking from a 90° bend indicating the same problem. I am a at loss to what it could be if not the PCB…. Good luck. A room thermostat will only tell the boiler when to fire it will not control the temperature of the central heating water, however some boilers do that now. Kind regards Chris, I have a vallant turbur 0242E that is loosing water which comes out of the overflow outside whats the prob? Changed the 3 port valve and pump but still comes up about every 3 days. I just don’t know what else to do. The Fix: This is an easy fix for most boilers with an external filling loop; simply open the little tap around a quarter turn until the display on the unit hits 1.5 bar, then close the tap again. Any comments gratefully received. As an example, the reset button on a Vaillant EcoTec will be flame with a line through it. Called plumber and he said I should change it–does a new boiler really take one full day, 2 people, to install? What is happening is that the boiler is wired such that as soon as the temperature in the sealed domestic hot water part of the system falls below the set temperature (typically 70 degrees C) of the boiler, the boiler fires up. Then 230v L-N-E from a fused spur straight to the boiler. The plumber I use is away, so was hoping to see if I can fix it myself. 1. We have a the ecoTec plus 824. This fault, particularly common for the Vaillant Turbomax, is caused by a faulty ignition, or no gas getting to the boiler. He thinks it’s either a diverter valve or the thermostat. It has a VRC 700 controller, which I have taken 2 wires from the boiler to the controller. Vaillant is a German boiler manufacturer, which is well known in the UK. When I turn shower back to normal it makes a whirling sound for a few seconds and then no water will come out of hot tap. If not, you should replace the ignition leads as this may fix the problem. Reset the tripped circuit breaker or replace a blown fuse. Since there is no acual pressure drop my thoughts are a faulty pressure sensor or faulty connection to main PCB or a faulty PCB perhaps? To get hot water I have to reset and then run the hot water. the water has always reached 80 degrees and suddenly it has started being choosey about when it will do this. Is the thermostat set to a certain temperature? However, I have no hot water! Dealing with a faulty boiler can be stressful, especially when you have to decipher fault codes and are left feeling unsure of what the problem actually is. the condensate is inside and connected to the internal drain under the sink and water is passing with good flow so not blocked. I have a vaillant ecotec pro and the boiler has gone off no electricity getting to it does anyone know what the problem is. In this boiler hot water is priority than central heating, if central heating is on and i start tap water, boiler gives priority to hotwater and switch off central heating. A thermostat fault may be causing your boiler to continue to fire up … There is no particular pattern to the noise, and will happen under different circumstances each time. We have a vaillant Eco TEC plus 438. If I turn indicator on shower to cold, I get cold water from the hot taps. I changed the 3 amp fuse in the electric switch and pressed the test button in the consumer unit. The most common faults and components with Vaillant Ecotec boilers. Just now boiler keeps hot water in demand on, that's why 'green light' keeps flashing. It's serviced once a year and due a service now. Worcester Bosch Boilers vs Ariston Combi Boilers, Review: We Reveal Just What the Vaillant EcoTEC Plus 825 Combi Boiler Has to Offer. Thank you. he said £300 for the PCB plus £250 labour. Mine does that too. Code F75. Could it be that the boiler gets too hot or simply suffercates, I’ve got hot water but the heating do not come on, Hi John, We use cookies to give you the best possible experience on our website. and how much will cost to fix, Hi I have a turbo max plus 824E. The boiler is fitted in an attached garage and the condensate pipe discharges into a waste pipe in the garage. Gets serviced yearly. I have checked the bar level on the boiler and its fine. If the boiler fires up every few minutes it is using gas but not heating your home. How Much Should My Annual Boiler Service Cost? I have an ecotec 838 exclusive, Its running two central heating zones, but when either zone requests heat it seems to take a long time to heat up and the screen is constantly showing overrun and water deficiency messages. I leaked from tne bottom of the boiler for about 5mins and stopped. We subsequently estimated that it had increased our summer gas usage by about 10%. does anyone have any ideas? It doesn't seem unusual. I have recently been getting F22/0.0 bar displays and no heating or hot water. The first thing I know is that there is the red illuminated light at the top of the light bar that shows you what is going on. Heating and hot water back to normal. As an example, the reset button on a Vaillant EcoTec will be flame with a line through it. It’s starting to drive us mad, it almost sounds like the noise a fridge makes but constantly – we have even switched off fridge to see if it was that!! It recently had the PCB board (?) Sometimes buttons get pressed by accident. Posted on 25th August 2016 1st March 2017 By Anne Miller. If the pipe runs outside, pour hot water over the pipe to defrost it, or place a bucket under the boiler and disconnect the plastic waste pipe on the far right of the boiler, before draining the condensate into the bucket. Water Temp set at 35 but Water still comes out at Scalding Point when the CENTRAL HEATING IS ON, when off, water returns to normal, i would run it at 40,. We have a ecoTec plus 824. I’ve just spoken to a gas engineer by phone and he told me that it wouldn’t be the low pressure that was causing my heating to not work….is this correct? Boiler is just over two years old and has been serviced as recommended. Having been away for two weeks over Xmas leaving heating on tick over I found that the flue had been leaking. no fault codes showing. The problem lies when I try going to the controller and turning the heat up for the radiators, which stay Luke warm and just don’t heat up. replaced but that made no difference and so the old one went back in. When it does fire up it reaches the temp setting on the dial currently set 65c and then goes into anti-cycling mode once more. The flame/burner indicator is lit on the display but the boiler isn't firing back up and the temperature keeps dropping on the readout. But still I keep getting this error code. Much appreciate any help thx, I have a eco max pro with fault code 11 flashing and its turned red. Initially i started getting luke warm/hot/cold water in the shower. I was initially told the tap filters needed cleaning which I have actually replaced them with new one’s to no effect. I hv valliant ecotec pro 28 r1.while gettg water level through valve.if we dont move the valve back down aftr water level is up.what can happen vid it.can it cause major damage. This will be located near where the fault code is being displayed. The heating is fine but I have no hot water. What do you think is the cause. The water in the pipes become unusually loud about a minute later. When I return indicator to normal there is a whirling noise and water ceases to come out of hot taps. If I was getting hot water from these taps previously why cant I get hot water now? One of the EcoTEC boilers that it sells - only in the UK, it seems - is the EcoTEC plus open vented 400 range, described on the Vaillant website here. I have a vanilla tea exoteric pro 28 and last night noted that it had switched off at the mains and when I turned itback in and refilled the tank and the bar went up I though it was ok until I noted the thermostat and the boiler were not communicating and the heating is on permanently. Thankyou. The boiler then fired up and the fault F22 was no longer showing. It fires up too when I turn on the taps on the washbasin. Any suggestions from you please John or anyone else having the same problem. This wastes fuel which will increase your heating bills and carbon emissions and could lead to a damaged heat exchanger as it is being overworked. He said it is supposed to do that but I can't remember why. A switch dropped down which I then pushed up. Hi, Great article, I wish you guys were down south as you seem to understand these boilers very well. Merry Xmas and a Happy New Year Upon switching on the boiler, the spark will generally activate the firing. Your boiler losing pressure is an occurrence more natural than childbirth, and overtime (or, sometimes overnight) – they’re bound to lose some water (pressure) and require topping up (or, repressurised). Well, there can be two reasons to this- If your boiler makes a single BANG only when it fires up, it’s most likely […] Any suggestion as to why the pressure went so high. Posts: 1 Received 0 Votes on 0 Posts Problems with Vaillant boiler not firing up. so, i moved the control right by the boiler, but it is still happening! hi needs an expansion vessel most likely. This is the reset and ignition button. I have a Vaillant Turbomax Pro 24 E. The heating has stopped working altogether. An engineer has been out four times – have had sensors, diverted valve and heat exchange plates replaced, engineer has now run out of ideas. I have just moved into a house which has an Ideal Isar Combi Boiler which is about 9years old. If your boiler makes a single BANG only when it fires up, it’s most likely due to delayed ignition. Thank you. Hi ihave a ecotec pro 28 its fine on hot water, but will not ignite on heating . AJ, Hi I have like warm water and luke warm hot water I have fixed this but instead of raising level to bar 1.0 I raised it to 2.6 but understand this is o.k. But shoots up to about 9/10ths when a tap in the bathroom is turned on. can you help please, Hi i have a eco max pro that has fault code 11 flashing and its turned red can you advise me ? All boilers will gradually lose pressure over time but if there’s been a sudden drop, it’s a sign that there’s an issue with the unit that needs to be fixed. Fill the water over 1.5bar what shall I do, I have a turbomax about 10 years old stated coming up with F22 fault but pressure above 1.5 bar I have no display, no heating or hot water. The Fix: Firstly, check the condition of the ignition leads – is a spark being generated? If the code F75 is flashing in your display, the fault is most likely to do with the boiler’s sensor not being aware that the pump has started running – so failing to notice a change in pressure. I have power at the boiler, and the controller. I can hear it whirling all night and day even when there is no heating on or water being used. Jennifer. So a plumber said to change the heater plate, did that and problem still stayed. The likely answer to most of the responders questions about this is in the way the boiler has been wired up or there is a component failure. Warning: Use only qualified CORGI registered contractors to work on gas boilers. My Valliant combo is leaking–drip, drip. Any ideas before I call the engineer to have a look as it’s quite annoying when the house is cold. I have a Valiant Eco Tec 637 , which is off , showing Fault codes F28 ignition failure and also F54. This will be located near where the fault code is being displayed. I turned it on and it starts off ok then goes to a trickle. Faults with your thermostat. Check the thermister or get a plumber. Mine does it as well and when I had it serviced I mentioned it to the engineer. Problems with Vaillant boiler not firing up. Hi, I have an Ecotech Plus 428 boiler installed in 2007 along with a complete replacement of water pump, regulator, room thermostat , timer and radiators . THECORBYLOONBlatantly Ignoring Tier 4 Rules. In the meantime the radiators are lukewarm. I can’t seem to find the part number of the siphon bottle. i have a vaillant VK654/9 – 1654/9 there is a beeping sound and a voice saying low battery, I cannot find were the battery is located. also, the radiators come on even when they are turned off at the boiler. Now, check the secondary current, which is about 15000-20000 volts for trigging the ignition socket & your boiler to easily fire up. My fiddling with water pressure and trying only show spark but no sustained operation. Please can you tell me what to do? Below are five of the most common faults and fixes you can try for your faulty Vaillant boiler, either yourself or with your local Gas Safe registered engineer. Hi, I have a 5 year old Vaillant ecoTEC plus618 which was serviced on 30th November. The radiator symbol also isn’t shown on the boiler screen. I have stood in the garage looking at it waiting for it not to fire when I am in there so I can see if there is a spark which fails to catch or something, but have not been successful. The boiler is still I working very well. If it is orange or yellow, there may be carbon monoxide present, which is extremely dangerous – turn the boiler off and call a Gas Safe registered engineer immediately if this is the case. We have a Vaillant EcoTec Pro 28 combi boiler fitted 5 years ago. I have a Valiant EcoTech Pro24. Hi John, The filling pipe has always been connected, and I have not had any issues, but I am concerned after reading the manual that it might damage my boiler. The system has plenty of water in it, ie (1.25 bars), I have bleed and bleed the radiators to ensure that there is no air in the system yet still it won't fire. Hi, I have the Ecotech Plus 837, and have just found out after two years of using this system, that after refilling, the filling pipe must be again detached at the double check valve. Try using the search bar at the top of the page to search for some keywords, or choose a topic and submit your own question. Whilst changing these, its worthwhile replacing the `PRV`. The boiler doesn't have power: The circuit breaker or fuse controlling the furnace may have tripped or blown. I have a gas combi boiler klima it keeps firing up on frost setting for my heating when its showing 18 degrees in my - Answered by a verified HVAC Technician. Does boiler pressure keep dropping? Hi. If you find that you’re often having to top up the boiler this way, you can’t afford not to find the source of the leak and get it fixed. i have had it serviced twice in the last 6 months. The boiler read it get to 30 If I turn the shower to cold water, water flows well from hot tap but it is cold. had a new ignition probe etc fitted still no joy. F22 error is showing and there is no pressure almost every day since the heating is on longer. Thread Starter. It is now driving me crazy. Once the pressure returns to 1.5 bar, close the levers and reset the boiler. Here are a few of the most common causes of overactive boilers: Get a service & repair quote . Digital display shows 1.5 bar. Recently however the boiler has started to switch to Anti-Cycling mode (fault code S.8 or S.28) -which then rapidly cools the central heating and water down . Any ideas please as my heating engineer is at a loss too. a few times lately the clock on my ecomax boiler has lost one hour over night so the heating did not come on we think the boiler is about 10 years old, Hi, Hi What do I do? The central heating system has been protected with Sentinal products every couple of years after the system has been flushed and has operated without fault. There should have been a 80m/m clearance to allow the bottle to be cleaned etc. The boiler stopped working and showed fault F22 dry fire. Filling the Heating system. This is the reset and ignition button. VRT 360f boiler is showing BMU Err. TOP TIP 1) Place a mix of washing up liqued and water 50/50 mix and apply by brush to the nut you have opened when closed to prove that there are no leaks Many boiler controls system keep the boiler unit hot at all times and that does have the logical effect that the burner fires on a regular basis regardless of an actual cause for heat due to standby losses. Now, with the boiler off for approx two hours, the boiler temp is 41 degrees. Vaillant condensing boiler ecoTEC plus? I’ve got an 831 plus that I set on the timer. The trouble is the BG fitter who installed the boiler put a pipe right under the siphon bottle. The pump remains on for a while but the boiler doesn’t fire up for about 5-10 mins . Vaillant boilers constantly monitor the water pressure and should it drop below a certain point, the F22 error code will appear on the digital display. Hi. Required fields are marked *. The hot water works fine when I call for it but when I ask for Heat the flame comes on and after about 30-40 seconds it goes out. The pressure keeps dropping down to 0 , I turn the pressure gauge around and brought it up t1.5bars, Ensure that the boiler is full of … Water both sides of valves, just not filling? I have an ECO PRO 24 and I notices this morning the hot water pressure is very low upstairs in the bathroom. I hope you’ve found this blog useful when troubleshooting your faulty Vaillant boiler, but remember, unless it’s an easy fix such as low water pressure or a frozen condensate, it’s best to call in an registered Gas Safe registered engineer who has experience dealing with Vaillant boilers. Any idea where to look first? You may have to reset the boiler. My Vaillant eco TEC pro 28 boiler keeps switching on but not firing up every time cold water is used in the house at all outlets, why? Servicing is also done annually. This morning when heating didn’t come on I notice the pressure was down. If the code F29 flashes up, the manual will probably tell you something along the lines of ‘flame extinguished’. Please help, I’ve just changed the pressure relief valve and connection tube on my vaillant turbomax vuw 242e But when I turn hot water tap on when heating is on I get a buzzing nosie didnt have it before what’s the problem many thanks. There should be a little window on your boiler through which you can see the pilot light. There is however a method of switching this facility off, if desired (for example leaving the house empty for a period). I’ve been told by the help desk more than likely it’s going to be the PCB? I’ve looked at a manual and can’t work out how to do this. Find the answer to this and other HVAC questions on JustAnswer. Hi there. I'd be interested to see what others have to say about this. Shoulc I worry about this.Many thanks. There´s no rytme to the faults as they just accure. I am experiencing a problem with my Vaillant 838 combi boiler which keeps tripping out the RCD, it seems to be an intermittent fault that usually occurs when the outside temperature drops below 5deg.C. Also I `ve had the grey levers `letting-by` so should also replace them as they can mask the actual fault. For EcoTEC Plus models, look below the boiler; there should be two grey levers which will have ‘closed’ written on them – each should be sitting at the ‘quarter to 3’ position (if it were a clock). Thank you. I have an eco max 835e Many thanks. I have called my engineer to check the boiler as the pressure was dropping to 0 after filling up the system with water. Hi, f22 comes up, tried using the valves to resolve it , not working? Hi. some days ive got hot water and heating and some nothing Is this normal? I have a vaillant eco tec plus 831. We obviously shouldn’t have to do this everyday. Hi my valiant boiler is having fault f28..but as soon as I reset that button it goes to normal again.This happen only when water is cold or weather is cold. Fixing combie boilers that fire up when the cold tap is used. Since then it does not work at all, radiators never get warm, maybe just less cold at most. Could this be the circuit board? I have a 4 year old Vaillant ecoTec plus 831 it has not had any problems up to now, over the past week or so there appeared a drip leak from the condensate siphon trap I let it drip into a jam jar,I then have to top up the water every 3 to 4 days. I have a Vaillant boiler that had its gas section replaced 10/10/2019 10/10/2019; Hi, i have a 3 year old vaillant ecoTech pro 28. until recently i have been delighted with it. At best Perhaps you've set it so that it's off unless the temperature drops to a certain level and then it kicks back in. My local installer says they can not find a fault especially as the system is working normally when they attend! I have no water from any hot tap. after about a week the same thing happens. I have a Vaillant ECO tech boiler – 2 years old. Hi I’ve just had united utilites to check water they said only deal with cold my hot is coming out white why ? Sorry, we can't find any related questions. Member. After approximately 20 mins or so the boiler comes back on by itself and the display shows around 2.3 bar. It is called short cycling and is likely to make your heating bills more expensive and, in the long term, will cause damage to the boiler. Coming up to the second winter with this intermittent droning vibration noise from our Vaillant ecotec plus 438 boiler. NOTE: I have NOT tried to top up the boiler via the filling loop. It all of a sudden fails to fire. Hi, Why Your Boiler Fires Up Then Turns Off. The longer I do that the hoter radiators I get , the temperature can go up to 80 on the display. its only just three years old. The boiler heats up to it's maximum of 85 degrees on the readout then stops firing up. I’m definite they’re all pushed correctly. The water pressure is ok and radiator symbol on the panel flashes as it should. Ours kept turning itself off and on, the plumber said it was the thermister - no I have no idea what it is either but he fixed it and fingers crossed all is well. I’ve got a vaillant turbomax that keeps throwing me an F28 error code. Thx. The gas supply is confirmed to be okey. The top of the boiler is now rusty and water is running down the rear. Vaillant Ecotec 831. Any ideas? However, for Vaillant EcoTEC Plus models, it’s a little different, as they use a built-in filling loop. The display panel shows 79 to 80 dog all the time even when cold what could cause this to happen? Cheers. Hi I have a eco tech plus 831 vuwgb316/5/5r2 boiler with a fault f28 I don’t know what to do. I’ve had it recently serviced and was told no problems, to be careful with the pins. Thanks. The part was replaced and the flue was renewed by a corgi registered engineer. I have an ecotec plus 831 boiler. The boiler then fired up and the fault F22 was no longer showing. When we have the heating on the radiators seem to take a while to become hot, also the little graph symbol on the boiler shows the burner to be operating at a very low level. On the display it has a egg timer displayed I have a Vaillant 182e. As tabathazig says, look at the controls. If the code F75 is flashing in your display, the fault is most likely to do with the boiler’s … We put it off whilst on holiday for 3 weeks and when we put it back on heat and water the radiators got hot but the water did not even though the towel rail in the bathroom that works off that circuit did. If there is apparently no leak in the home but the boiler pressure still keeps dropping, the culprit may be one of the boiler’s internal components. The F button to overide the currant heating/water is not working. In the handbook it says that this is to keep the Heat Exchanger up to temperature so as to provide instant hot water. Can it be helped ? Hi John, saw this article so I thought I’d give you a message to pick your brains. Thank you, I have a vaillent eco pro plus about 7/8 years old no hot water or heating screen completely blank changed fuse screen flickered for a couple of seconds went blank again any ideas please. Any ideas on what is wrong? however, it has suddenly started doing its own thing! Maybe just less cold at most large investment in Scotland by building a dedicated training centre when a in! Leads – is a spark, check an ignition convertor if it is supposed do. Playing up fixed this but instead of raising level to bar 1.0 I raised to! The PCB… ecoTech pro 28. until recently I have actually replaced them new. Via the filling loop tried using the valves to resolve it, not working started being about... Never been changed as far as I have a Vaillant ecoTech plus,... Control right by the help desk more than likely it ’ s to no effect plus! 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