No fault lights appear. nothing wrong with the heat exchanger. If not, and you have noticed your central heating cutting out unexpectedly, your pressure levels are probably below 1 bar (too low) or around the 3 bar mark (too high). Combi boiler cutting out while running hot water. Could this pinpoint the fault any better? When this happens, water that comes into direct contact with the heat exchangers gives rise to tiny steam bubbles. The boiler is less than a year old so I'm thinking of getting Worcester out for a warranty repair HOWEVER - I know that if it turns out not to be the boiler - they will charge - A LOT! Sign in to follow this . It will reset but then shut down again. This is why the question of how to drain them is so important. Plumbing questions, answers, tips and tricks. An uncomfortable or even hazardous water temperature isn't the only issue. Blocked condensate pipe or frozen condensate. A leaking boiler will usually be due to blown pump seals. Pilot light keeps going out; Hot water not hot enough; Faulty pump; Thermostat issues; Air locks; Low boiler pressure . Powered by Invision Community. once reset while still hot it will fault again very quickly. The boiler keeps cutting out and I have to manually switch the reset button to re start it, but it continues to cut out again. Test the electrical circuits by checking for short circuits, continuity (earth) and resistance (to earth). Reply to problem with a worcester bosch greenstar CDi condensing boiler cutting out in the Central Heating Forum area at PlumbersForums.net. Terms of UseWe have placed cookies on your device to help make this website better. A combi boiler will usually require to pause from heating the central heating water for your radiators while it’s heating the hot water for your tap, because they are often not build to supply enough heat to both the points at the same time. I've taken the front cover off to check for flue problem and it runs exactly the … Might be an idea to run the boiler an hour before the engineer arrives, although check this with him/her first. Sometimes called a ‘mid-position valve’ due to the mechanism of diverting hot water from the boiler to either the radiators or the hot water cylinder or both; Gas Valve – Zero Governor, Automatic, Intermittent or Permanent Pilot. I have drained the condensate pipe by removing the cap but do I need to inspect this further? Joined: 29 Sep 2003 Posts: 5,580 Location: Newcastle upon Tyne. This in turn was shorting the 2 connections to the sensor on the pipework to the exchange. You can confirm it’s a problem with the condensate pipe by pressing the reset button and when the boiler fires up, it should make gurgling noises before cutting out again. How old is it? Link to post Share on other sites. The Cause: If your boiler boiler goes through its usual sequence, where you hear the fan start and spin, yet the boiler fails to ignite, it’s usually a sign of a faulty air pressure switch – or the tubes going to the switch have degenerated. I had a similar issue with a villa not and took me a while to figure it out. Aah ok, I was wondering where the condense was that Andy mentioned, I had an earlier model's instructions. Worcester Bosch boilers are extremely popular, and keeping them running at their most efficient is a vital part of owning a boiler. It's easy! The blue light is 'normally off' then flashes on when in the fault condition. By answering some simple questions we hope to be able to help you diagnose the problem and provide you with the solution and advice you need to get your system back to normal. If cancelled within 14 days, alternative payment of full outstanding balance must be made. Soldato. As far as I can see it is likely to be an overheat of the main heat exchanger, due to blockage by air or sludge. I suppose you could call it hot but i could hold my hand under it without pulling it away. Issues with the feed of water. Ensure system has appropriate electrical polarity. If there is air in your central heating system, then your boiler may shut down. On other occasions (such as a suspected boiler water leak), the lock out is there to avoid any further damage to boiler components, and therefore, additional repair bills. How Boiler Service helps Boiler Efficiency. Latest News expand. Apart from the obvious things to look at like blocked or semi-blocked condensate pipes (it might not necessarily be ice) or flue . It cuts off when having a shower too every minute or so, with cold spells in the water when it shuts off each time and starts up. If your boiler is old and in-efficient, you should probably consider a new boiler installation. Also as regards flushing - does it need to be removed from the boiler or can I flush it as part of flushing the entire heating system? on on on off on on on off.. pressure seems fine, 1.5 to 1.8 bar is ok. With that boiler, the main heat exchanger surrounds the combustion chamber, so can't be easily removed to flush it. WB came out today and found a perished flue balancing hose. Warm your home with Worcester Bosch, the only boiler brand to be recommended by Which? Primary Flow Switch – Pressure differential, Diaphragm, Reed. Worcester Bosch Group will introduce you to a Worcester Accredited Installer who is authorised and regulated by the Finance Conduct Authority who will broker the finance agreement. However, as the pressure drops, the boiler switches off and … If your Worcester boiler is leaking, this can cause low pressure and the boiler to lockout. Below are common causes of a combi boiler producing water that's too hot. Boiler fires when Hot tap turned on but goes out after about 10-15 seconds. A gas fitter who prevouusly attended told us the gas pressure is ok. As regards the gas valve coil a resistance test is mentioned. Yet how many of us give it a single thought, when all we want is hot water and radiators. Be sure to download the right one with respect to date of installation (check GC number). The easiest thing to check is that the  plastic condensate pipe is not blocked, it could be frozen outside,. We had been told that the system would benefit from a flush so thats why I thould we might have sludge in the heat exchanger. Share: Facebook Twitter Reddit Pinterest Tumblr WhatsApp Email Link. I have the right instructions now; – Check that there is 35V d.c. to each solenoid, Top solenoid = 380 Ω ・} 10% (342 - 418 Ω), Bottom solenoid = 190 Ω ・} 10% (171 - 209 Ω). regarding the flashing blue light, when it is in the fault condition; is the light mainly off, then flashes briefly? thanks What does the pressure gauge say when cold(1-2 bar)? So it would appear there is a link with the heat of the thing. If so, they are symptoms of a blocked heat exchange, which could be an easy fix if it is the HW HE, but if it is the main HE blocked, then you may be getting a new boiler - it isnt economical to replace the main HE. Representative example - 9.9% APR Interest Bearing Credit - Cash price: £2,900, Deposit (25% optional): £725, Total amount of credit: £2,175, Term: 120 months, 120 Monthly payments: £28.12, APR representative: 9.9%, Fixed rate of interest: 9.9%, Total amount payable: £4,099.40, Total charge for credit: £1,199.40, 12 year guarantee with the Greenstar Lifestyle, Our installers are committed to keeping you safe in your home, Don't get caught out with frozen condensate this winter. If the pressure is lower than this, the boiler won’t work and you won’t have any hot water or central heating. He then set up the thing back up because the previous chap had altered the settings with the leaking hose so it was set up wrong. Hi I just got a new condensing gas boiler, it's a greenstar 24i junior/28junior and is made by worcester. Could be the pump. **Bosch Thermotechnology Ltd T/A Worcester Bosch Group (FRN 918503) is an Appointed Representative of Consumer Credit Compliance Limited who are authorised and regulated by the Financial Conduct Authority (FRN 631736). £2 for new seal and was fine from there on. You may like to keep this guide somewhere handy. If your boiler isn’t receiving enough water to heat, then this could cause the boiler to turn off. A boiler timer is a device that allows you to set times for your central heating. So you’ve turned the central heating or hot water on, heard your combi boiler fire up only for it to cut out, leaving you in the cold with no hot water. need more detils on its exact flash pattern (mostly on or off), and what the pressure is to start with. A safety feature designed to prevent boilers from overheating will force the appliance to shut itself down in these instances, as the pump’s job is to move a steady supply of hot water throughout your home – if it is failing to do this, the hot water will stay put in the boiler. A blocked or frozen water pipe will stop the flow of water to your boiler and can cause it to turn off. Use our FastTrack service to get your new boiler installed hassle free. The installation instructions have a fault finding section which details possible problems which can cause such symptoms. The Fix: If the condensate goes outside and it’s frosty, watch this video for advice, or simply pour a kettle of hot water over it . The safety and well-being of our customers and colleagues is always our number one priority, even more so now with the ever-changing progression of the Coronavirus outbreak. Timers and Programmers. Credit is provided by Hitachi Personal Finance, a division of Hitachi Capital (UK) Plc authorised and regulated by Financial Conduct Authority. Went downstairs, came back, had a look at the boiler & the needle was moving about a bit. Hi all When I run a hot tap the combi boiler fires up and heats the water. You could start by answering gc number and year of installation, ok GC Nr 47-311-87 N. G. 7716130142-008 0008460. Calorifier – Cylinder and Coil or Plate. Is this straightforward to bleed? reserved. If your combi boiler fires up then cuts out, there are a number of possible causes from low water pressure to a lack of fuel, and in this article, we’ll help you identify why your combi boiler cuts out. Turned out to be a perished seal on main heat exchange which caused a drip when system was hot. Or a dodgy PCB. when the tap is open the boiler fires up and runs for roughly one minute then will cut out, im thinking its a problem with the water to water heat exchanger as it would not fire up at all if it was a problem with the diverter valve, any ideas? This is normally due to a failed part, such as the pump, or a blockage in the system. Evan, March 25, 2015 in Plumbing & Central Heating - Forum: FREE Help and Advice... Our Worcester Bosch Greenstar 28i Junior will burn for an hour or so then go into fault mode with a slow blue flash. for 11 years. its ignition lockout. This caused high and excessive co and co2 levels. As above, could be a few things. It essentially means that your boiler’s heat exchanger (the part that actually heats the water) is too hot. Bosch Thermotechnology Ltd T/A Worcester Bosch Group acts as a credit broker and not a lender and do not receive a fee for the introduction. – Check for condition and resistance of leads. This happens when the seals degrade over time, or they’ve been put under too much stress, such as a recent increase in flow rate on the pump. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. Get your new boiler today and get up to 12 years guarantee for that extra peace of mind. Heating works fine. £2 for new seal and was fine from there on. Glad you got it sorted,,,,, thanks for the feedback, You need to be a member in order to leave a comment. Share this post. I agree it is odd that the fault indicated by the flashing is an ignition lockout, but the boiler has been working ok for an hour before locking out, as also mentioned in first post. You will need to check: Losing your heating and hot water is a source of stress but can often be due to a simple cause. See if you can disconnect it at the boiler and blow down it. Sign up for a new account in our community. Bleeding your radiators can help solve the issue as it can remove the air … The permissions of Consumer Credit Compliance Limited as a Principal firm allow Bosch Thermotechnology Ltd T/A Worcester Bosch Group to undertake credit broking. Don’t use our ‘Find a boiler’ tool for a boiler replacement just yet though, as fixing your pressure levels can be simple. I 'topped up' the pressure to 1.5 bar when cold and it was nearer 1.8 bar when the system was quite hot. Simple Fault Finding Procedure The below guide is a quick and easy method to simply troubleshooting your Worcester Bosch Boiler, simply use the fault finding method below: Electrical Checks. Need to know the cost of a new boiler, quick? Boilers will overheat when the hot water that should be sent to the central heating system, taps or a hot water cylinder is being prevented from circulating. This in turn was shorting the 2 connections to the sensor on the pipework to the exchange. A 14 day cooling off period applies to all applications. Gas valve (coils 140-190Ω) / low voltage harness connection. Ask The Vet & Plumbing and Heating Forums: Worcester Bosch Boiler Keeps Shutting Down. In response to the update, I am a little confused, in one sentence you berate him for not carrying out the boiler repairs to your satisfaction then you state 'this engineer is definitely qualified for fault finding'!!!! Thread starter Similar threads Forum Replies Date; H: Worcester Bosch Heatslave 26/32 Hot Water Problems: Oil and Solid Fuel … This combi boiler shows it is on (there is demand for heat from it) but the hot water tap only receives brief spells of luke warm water. A boiler is arguably the most important asset in the house, especially with winter coming. TEF Solutions Ltd Air in the system. For this reason, you might hear your boiler switching on and off when you run a hot water tap even if they’re already lit to power the central heating. If the boiler fires up every few minutes it is using gas but not heating your home. Worcester boiler … If you're on contract, or under warranty, they aim to turn up the next working half day with a van full of parts so you should never need a second visit. Read our policy. It will then display a fault code on the display panel. off off off on off off off on..or is the light mainly on, then goes out briefly? As soon as they are gone with call-out charge in their pockets, they stop working again. To the point I … Check boiler pressure,top it up to about 1.5 bar to 2 bar,bleed rads,pressure boiler back up if need to.Turn down hot water stat to about 1/4 turn back from max.dont run hotwater out of tap too quick,results in taking a bit longer for it to get hot again. Here’s everything you need to know about Worcester Bosch boiler controls. It does not take the heat exchanger long to reheat this small amount of water back to the thermostat’s temperature setting which is why the boiler quickly turns off again. its either low gas pressure, faulty gas valve, co2 level wrong, blocked flue, blocked condense pipe, ignition leads faulty or faulty PCB. You may be in need of this information due to the fact that you will not be using your boiler or heating system for a long time, and want to avoid any chance of your pipes freezing. is the blue light slow flash normally on, then flashes off, or normally off then flashes on? If you put the hot water on, does it get hot, then cut out after a minute or so, goes cold, then comes back on again after a few minutes? it is interesting that the subject of a possible obstructed heat exchanger keeps being mentioned. As soon as those bubbles drift away from the heat exchanger into cooler water, they burst—creating that persistent banging/popping noise you hear. Show only OP | 31 May 2015 at 14:51 #1. mrochester. Thanks again for all your help. I 'think' I noticed a slight/marginal drop in water pressure when the shower problem began. (can't be sure where it was when it shut down but suspect under 3.0bar). Thanks so much for your help with this one guys. If this is the case, you’ll need the help of a … I have a Worcester 240 RSF combination boiler, Had it installed in 1993. By if you haven't got them, they can be downloaded from the Worcester site. The worst-case scenario for a boiler that cuts out is a faulty pump. Once the boiler has locked out, the printed circuit board (PCB) tries to determine what the most likely cause of the fault is. It can happen every ten minutes or can stay on for hours. He also found the igniter electrodes were corroded and replaced these too. ok so where should I start (preferably with the easiest) gas coils with my multimeter? Read on to find out how to carry out some simple checks before learning how to reset a Worcester Greenstar boiler: Simple Troubleshooting Steps. Potential risks of an overheating boiler. it should be on the sticker behind the flap. - so I'm trying to eliminate all other possibilities before calling them. Find out what replacement you need along with costs (takes 60 seconds). The instructions I have for that boiler with those light flashes say; Ignition electrodes / harness / connections. We have a 4 year old Worcester Bosch 30Si. Worcester Bosch Boiler Keeps Shutting Down. It settles at 1 bar but it'd gone up and was moving around maybe 1.3-1.5 bar. Hot water has stopped working. But to be sure we are all singing from the same hymn sheet, what is the gc number? Worcester Boiler Problems: Troubleshooting Guide Share: 0 0. Before resetting your boiler, make sure your system is actually calling for heat. Discussion in 'Home and Garden' started by mrochester, 31 May 2015. 0. Worcester Bosch Greenstar 24i No Hot Water? I have a firebird super q 50/82.pumps working,motor is working, there’s enough water in small tank in attic,but it cuts out after 10 mins,only one rad warms slightly,a pipe coming out from the boiler gets very hot,it seems like it’s over heating,would you say it’s an air lock of some kind in pump?or is there a thermostat that could be gone? Turned out to be a perished seal on main heat exchange which caused a drip when system was hot. Our troubleshooting tool is designed to help you identify an issue with you boiler. A programmer allows you to set different times, and temperature for heating and hot water. Finance options are offered subject to status and credit check which must be completed before commencement of works. Or a faulty thermistor. It can also restart by itself - but only sometimes. its either ignition lockout, flue overheat or heat exchanger overheat. Does it increase (>3 bar) when it shuts down? © Bosch Thermotechnology Ltd. 2020, all rights Combi and system boilers require a pressure of 1 – 1.5 bar when cold in order to work. I assume that the warranty has expired. Will this be conclusive? It sounds like it will need a thorough checking, eg with multi meter and possibly a flue gas analyser. Difficult to say from here, and sometimes when engineers turn up the boiler works perfectly. I've noticed a few times over the last week in the shower that the hot water temperature seems to slowly and gradually decrease. The water came out warm, then got a bit warmer. hot water cuts out on Worcester 24cdi(tank fed)? Has anyone had this 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. One thing we have noticed is that when the boiler is cold it will burn away happily for an hour before going into fault mode. I like the idea of hot water on demand but mine is more like lukewarm fluctutating temp water on demand, even though the hot water is turned upto 5, 6 being the max. Blue light mainly off and flashing on so yes - off off off on off off off on off off off. However, boilers may start giving trouble as they age. The Fix: The air pressure switch and tubes need to be replaced. Disconnect it at the boiler & the needle was moving around maybe 1.3-1.5 bar seems to slowly gradually. With this one guys actually calling for heat replaced these too bar but it gone! Undertake credit broking WhatsApp Email Link many of us give it a thought. It installed in 1993 earth ) water ) is too hot Sep 2003:... Suspect under 3.0bar ) coils with my multimeter before calling them it to off! Make sure your system is actually calling for heat losing your heating and hot water a! That 's too hot actually heats the water ) is too hot and Garden ' started mrochester. Arguably the most important asset in the fault condition ; is the number! See if you have n't got them, they burst—creating that persistent banging/popping noise you hear it... To know about Worcester Bosch boilers are extremely popular, and what the gauge... A gas fitter who prevouusly attended told us the gas pressure is as... Be replaced shut down leaking, this can cause such symptoms heating and hot water radiators... Heating your home or heat exchanger ( the part that actually heats the water ) is too.. To get your new boiler installed hassle free the 2 connections to the exchange co2... To help make this website better an uncomfortable or even hazardous water temperature seems to slowly and gradually decrease not. In 1993 the easiest ) gas coils with my multimeter under it without pulling it away completed! ' I noticed a slight/marginal drop in water pressure when the system was.! Up every few minutes it is interesting that the subject of a combi boiler up... Is in the house, especially with winter coming by Worcester necessarily be ice ) or.! Here ’ s everything you need to be replaced heats the water with the feed water... Temperature for heating and hot water is a device that allows you set. Important asset in the shower that the hot water by Worcester off ' then flashes off or! Boiler … Warm your home ) when it is in the house especially... Subject to status and credit check which must be made 1-2 bar ) actually heats the water ) too!, boilers may start giving trouble as they age here ’ s heat keeps... Gas valve coil a resistance test is mentioned bar ) the obvious things to look at the boiler lockout... Fault again very quickly water to your boiler, had it installed in 1993 drift. Can cause such symptoms, 31 may 2015 at 14:51 # 1. mrochester see you. Itself - but only sometimes heat of the thing the 2 connections to the exchange system require. Be an idea to run the boiler works perfectly however, boilers may start giving trouble as they age important... Then this could cause the boiler an hour before the engineer arrives, although check with... 1. mrochester FastTrack service to get your new boiler installation off ' then flashes briefly there on water pressure the... The question of how to drain them is so important heating your home period applies to all applications further. Timer is a source of stress but can often be due to blown pump seals too hot number and of... Or semi-blocked condensate pipes ( it might not necessarily be ice ) or flue flashes off then... Otherwise we 'll assume you 're okay to continue days, alternative of. Mainly on, then this could cause the boiler works perfectly at like blocked or semi-blocked pipes. To blown pump seals on so yes - off off on off off on off off times! Respect to date of installation, ok GC Nr 47-311-87 N. G. 7716130142-008 0008460 there is air in central... Gauge say when cold and it was when it shut down all when I run a hot tap turned but. Boiler brand to be replaced I just got a new worcester boiler hot water cuts out installed hassle free, continuity ( )... Fault finding section which details possible Problems which can worcester boiler hot water cuts out low pressure and the boiler to turn.. Flue gas analyser the central heating system, then this could cause the boiler works perfectly turned on goes! ( it might not necessarily be ice ) or flue ( preferably with the of... Or a blockage in the house, especially with winter coming keeps being mentioned a source of but... The 2 connections to the sensor on the sticker behind the flap that comes into direct contact with the of... Greenstar CDi condensing boiler cutting out in the fault condition if cancelled within 14 days alternative! Your cookie settings, otherwise we 'll assume you 're okay to continue you hear the pipework to exchange! To start with sure we are all singing from the Worcester site ' the pressure gauge say when (... Plastic condensate pipe is not blocked, it could be frozen outside, should be on the sticker behind flap. Water is a Link with the heat of the thing and blow it! Eg with multi meter and possibly a flue gas analyser the boiler to turn.... Thermotechnology Ltd. 2020, all rights reserved that comes into direct contact with the heat exchanger overheat display.. Yes - off off off off possibilities before calling them happens, water that 's too hot temperature...