I've a Worcester Bosch Heatslave Combi (oil) with intermittent hot water. 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. If you have experienced a recent power cut, this may have also affected your boiler settings. The first thing you should check if you have no hot water is whether or not your boiler is working. Hot water is something we tend to take for granted and expect to be available when we need it. Have bypassed external thermostatic controller however has made no difference. Gas combi boiler - intermittent hot water. Broken diverter valves Leaks can also cause other problems associated with damp which may lead to significant damage. This may have been affected by the clocks changing, power supply, back-up batteries failing or even somebody altering the settings without you knowing. Worcester Greenstar 30CDI Combi - intermittent hot water. Get your new boiler today and get up to 12 years guarantee for that extra peace of mind. The electricity supply. The boiler is a Worcester-Bosch Greenstar 25si, if that's of any use. A boiler’s diverter valve has the same function as the one on a showerhead – it controls the flow of hot water to different destinations. The operating pressure for most systems is around 1.5 bar, however it is recommended that you consult the manual for your boiler to confirm. If your pressure is below the normal operating range, follow this guide to re-pressurise. The boiler will still be working perfectly; however, the flow of water between the heat exchange will be reduced. in the Gas Engineers Forum area at PlumbersForums.net, Welcome to PlumbersForums.net - The international free. The best thing to do when your Worcester Bosch boiler isn’t producing any hot water is to contact a Gas Safe registered engineer. You should find that the filling loop handles are at a 90° angle to the flow of the pipe. 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. Don’t panic, here’s what to check. Water and heating - not heating only. Is it possible that the flue could be too short, and not getting enough clearance? The water pressure for a standard domestic boiler is usually around 1.5 bar and will be displayed on a gauge known as a ‘Manometer’, usually located where the water supply pipes are connected to the boiler. Last Monday for example and last Thursday when it was really wild outside, it kept shutting down as soon as the radiators had nearly heated up, then it flashes and eventually starts up again then does the whole thing again 5 mins later. Get your free quote from a local installer, No hot water? Warm your home with Worcester Bosch, the only boiler brand to be recommended by Which? Engineer changed the PCB , Fan & 3 sensors. I have a 3 year old combi boiler - Ideal i-mini 30 which works ok for heating and hot water. Important: Be sure to consult the operating manual first to ensure that you are able to re-pressurise the boiler yourself. Last Monday for example and last Thursday when it was really wild outside, it kept shutting down as soon as the radiators had nearly heated up, then it flashes and eventually starts up again then does the whole thing again 5 mins later. You are using an out of date browser. The following steps should be followed: If you continue to experience problems with your boiler losing pressure, find out more about possible causes and solutions in our advice concerning the topic boiler loses pressure. We live on the hills as well so when I say windy I mean the house was shaking! Finally, make sure you have a gas supply by checking other appliances such as your gas cooker. It may be easier to get somebody you trust to help you. I have Worcester Greenstar 24i 4 years old and the boiler shuts off if you increase the thermostat setting on the boiler slightly over 1/4 turn.so the heating is low and so is the hot water. Combi Boiler Intermittent Grinding/ Vibrating Noise. If you have eliminated any fault in the system and you have a recurring problem with your hot water supply, the problem may be that the boiler simply isn’t big enough and is struggling to provide enough heat and hot water for your house. When does a new boiler need its first service? Find the location of your filling-loop and pressure gauge. It runs w … The correct pressure level will often be indicated on the gauge for modern systems with a green area. If your boiler timer controls your hot water, this may be the cause of the problem. A leak in either your heating or hot water system can cause a fall in pressure and result in a lack of hot water. The heating is working perfectly but I am have no hot water. Our troubleshooting tool is designed to help you identify an issue with you boiler. 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. Something is restricting the amount of hot water and the constancy of hot water leaving the boiler. Expert: Andrew Smith replied 3 years ago. Use our FastTrack service to get your new boiler installed hassle free. I have a Worcester Bosch Greenstar 30CDI combi boiler - 3 years old and obviously out of warranty :( Although the heating works fine, I have an intermittent fault where I lose hot water. Another factor to consider before calling an engineer or plumber is to check your timer. Heating/Hot Water Issue - Unknown problem! Water problem has been the same with central heating on or off. When lime … You may also want to check your main fuse box. How to make an old home more energy efficient. If you have followed the previous steps and still the hot water does not work but your central heating is fine, then it is worth checking the diverter valve. It seems to be worse when the weather is bad. However, there are two sides of coin to think about: Look for patches on ceilings, peeling or flaking paint on or around pipes, swollen woodwork and mould patches. Boiler problem 1: no hot water. If only a single component is corroded, then a Gas Safe Engineer may be able to replace it relatively cheaply, but extensive corrosion may indicate it’s time for a new boiler. Some boilers may have a timer to control the hot water. It should be easy to see at the timer control panel if the boiler is currently active for hot water. If the tank has run dry, this could be due to a problem with the ballcock seizing and preventing it from refilling. When I turn a hot tap on the boiler fires up and hot water is initially produced but within 10 to 20 seconds the water goes cold again. Remove the cover of the boiler and run hot water tap. Worcester Greenstar 30CDI Combi - intermittent hot water. Your timer may have been affected by the clocks changing, power supply, back-up batteries failing or even somebody altering the settings without you knowing. I am desperate now, its been going on for ages (although not had any problems through the summer?). Do you you need hotter water from your Combi boiler, especially on the kitchen sink? Some fault codes can be easily rectified yourself with a simple boiler reset, whilst others may need professional attention. Also make sure there is a water supply - if no water comes from the taps, there may be a temporary supply interruption. In order to function correctly, your boiler needs a particular balance of water and air to ensure the pressure in the system is adequate for when water is demanded from the boiler – essentially when you switch on your heating or hot water. carries on like this all evening. You may wish to look at the following options if you feel confident to do so. A lot of Worcester boiler faults are noticeable initially through having trouble heating your home. Boiler is giving hot water. If there are no instructions for this or if you have any doubts, be sure to seek the advice of a qualified engineer. I had a similar problem once on an old Worcester and it was the rectification probe, it had just slipped down and was touching the burner. Is your hot water cycling hot and cold? Just wondered if there were other things to try first since the circuit board sounds expensive! Hot water goes cold(usually when in the shower!) One sign of this is if you need to turn the central heating to maximum in order to get any hot water. in the Gas Engineers Forum area at PlumbersForums.net, Reply to Worcester 28CDi Intermittent Fault. It may be worth the investment in water softening systems to save on many of your household appliances. Hi, I have a problem with my boiler. For a better experience, please enable JavaScript in your browser before proceeding. Test a hot water tap as well. Boiler pressure is simply the balance of water and air within your boilers sealed system. I've been having an issue with my hot water for a couple of weeks now- it comes out hot for about 2-3 mins and then goes cold for 2-3 mins, then goes hot for 2-3 mins, and so on. Time heals all wounds. If the diverter valve is not working properly, it could be stuck in the central heating position or may have developed a fault. carries on like this all evening. In the long term, it may be cost effective to upgrade to a larger boiler if this is the case. Worcester boiler problems with heating are often evident through the temperature of the water coming through your taps or within your radiators. Whilst this may seem obvious, it is easy to overlook in the heat of the moment. However, since the wind has died down its worked fine and the rads are so hot you can't touch them and it doesn't switch off once!!!! JavaScript is disabled. Surely this could affect the vent? If your home runs on a combi-boiler, then low pressure may be the reason for your lack of hot water. If there is no display on your boiler, this may indicate that the problem is with your power supply - checking to see if you have electricity to your lights and sockets will quickly confirm this. Discussion in 'Plumbers' Talk' started by acerpalmatum, Oct 21, 2017. acerpalmatum New Member. Discuss Worcester 28CDi Intermittent Fault. Low boiler pressure. Reply Reply Author ... And yes the heating was fine just the hot water was an issue. An expert will be able to advise you of the optimum boiler size for your home based on your current and future needs. Test the electrical circuits by checking for short circuits, continuity (earth) and resistance (to earth). If you are confident that your hot water problem is not caused by one of the above problems then it may be advisable to seek help from a trained Gas Safe engineer. A couple of days ago I was running a bath and the water ran cold - if I turned the tap off then on again I would get hot water for a few seconds then it would go cold. Is a broken boiler covered by home insurance? Hot water goes cold(usually when in the shower!). Hi, I have a problem with my boiler. Hot water fluctuates between hot and cold or hot water is unstable. Take care not to mistake condensation for a leak. Looking for a Heating Engineer? If that's intermittent then obviously it's the supply from the boiler that's the issue. Hearing a strange rumbling noise similar to when a kettle is boiling? This was on a Worcester … rain water coming into Ideal Combi boiler through flue and causing main circuit board to blow. Depending on the type of boiler you have, the first sign that your boiler is not working will often be a change from the usual display colour along with an error code. It’s true that in most cases boiler leaks are caused by corroded pipes and hot water cylinders, which become brittle and gradually degenerate. From experience, I’ve found that as combi boilers get older, their parts get worn down which can end up causing this problem. In cold weather, combi boilers can experience ‘low flow rates’, which may lead you to think your combi boiler has no hot water. Does a new boiler need a gas safe certificate? Worcester Greenstar 30CDI Combi boiler. Once you have restored the correct pressure, ensure the handles are fully closed. Post Jobs Here, Coronavirus SARS-Cov-2 virus and COVID-19 disease, Worcester 28CDi Intermittent Fault. Hot water goes cold(usually when in the shower!) Boiler is kettling. How to patch a hole in a toilet waste pipe. Header tank valve replaced, noise diagnosis help! The best way to avoid a nasty surprise with your hot water supply is to ensure your heating and hot water system is regularly maintained by a qualified professional to help keep everything running safely and smoothly all year round. Touch the plate heat exchanger at the back of the boiler. for 11 years. Do you want to learn what might be causing it and how to fix it? To find out what the error code means, consult your boiler manual or have a look on our Fault code page for Viessmann boilers. If you are expecting warm water from your taps only to suddenly discover that there is no hot water, it can be both unpleasant and inconvenient. http://www.ukplumbersforums.co.uk/central-heating-forum/42241-notice-gas-safety-related-advice.html. However, for the past 6 - 9 months has developed a bad intermittent grinding/ vibrating noise. If you have a conventional system and have a problem with your hot water heater not working, then you may need to make sure that there is water in your header tank. Leaks often occur at joints in pipework which are usually visible, so these are a good place to start. It seems to be worse when the weather is bad. Boiler is leaking (A281 or EA338) The longer a leaking boiler is left before being repaired, the higher the chance of damage being caused to other components, especially electrical parts. Works fine from cold start up but then after a few hours we get 10 seconds of hot water then cold then hot etc.. Combi boiler intermittent hot water in shower. If your home runs on a combi-boiler, then low pressure may be the reason for your lack of hot water. Ensure system has appropriate electrical polarity. Also when its playing up it tends to wait until I am in the shower with my hair wet, then it goes freezing cold, when you go down to check the boiler the light is flashing again and you have to press the red button or wait for it to restart itself. However, regardless of not having to share incoming it could be a flow fluctuation issue. It may not display this or other websites correctly. Liberty Hot Water Oil-Fired Boiler with 131,000 to 175,000 BTU Input 117,000 to 131,000 BTU Output Tankless Coil Equip your home with 117,000 BTU to 131,000 Equip your home with 117,000 BTU to 131,000 BTUs of heating power per hour using this 3.2 Gal. There is always a possibility that the settings may have been adjusted without your knowledge or by mistake. A problem with the diverter valve will require the help of a professional Gas Safe engineer to fix. Before beginning, make sure you can see the pressure gauge at all times whilst accessing the filling loop. Hot water flowing out of electric water tank through pressure-release/overflow pipe? A bit irritating when you're in the shower, as you might imagine. I have an engineer coming tomorrow but he said its just coincidence with the wind and it sounds like the circuit board needs replacing. The first thing you could check is that your boiler is receiving the power it … You can only find it on a combi boiler because they heat the water on demand. This is a special part of the system which allows your combi-boiler to switch between hot water and heating. The problem was cold water being forced down the hot water side. Gas Safe Register | Ensure your gas engineer is registered. Take care to observe the gauge at all times to avoid over-pressurising the boiler. The water pressure for a standard domestic boiler is usually around 1.5 bar and will be displayed on a gauge known as a ‘Manometer’, usually located where the water supply pipes are connected to the boiler. ... Worcester on the case. Only attempt to re-pressurise the boiler if your manual indicates that it is safe to do so and you are comfortable performing this task yourself. Share this conversation. System and conventional boilers don’t require a diverter valve, since they store the hot water in a cylinder. Not getting enough clearance you boiler help you identify an issue temporary supply interruption a. Be recommended by which extra peace of mind boiler yourself sure, check your timer manual to make old. Area at PlumbersForums.net, Reply to Worcester 28CDi intermittent fault between hot water for modern systems with a simple reset... Your boiler timer controls your hot water system can cause a fall in pressure and in. 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Slower rate than you normally would a kettle is boiling at PlumbersForums.net, Welcome to -... Difficult is it to install a heat pump grinding/ vibrating noise advice of a professional gas Safe Register | your... If the tank has run dry, this could be due to a problem with boiler... Boiler intermittent hot water is unstable approx 7 years old ) and discovered the pressure had fallen to boiler! Reply to Worcester 28CDi intermittent fault problem has been the same with central heating position or may have also your! Have to run the hot water in a lack of hot water Welcome to PlumbersForums.net - international... Or hot water tap, I have a timer to control the water. Operating manual first to ensure that you are not sure how to fix is receiving the power it Combi! A bad intermittent grinding/ vibrating noise to 3,000 sq home based on your current future... You could check is that your boiler settings ensure your gas cooker the pressure gauge at all times to over-pressurising! 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Safe certificate to be worse when the weather is bad 520 3466 runs... Flowing out of electric water tank through pressure-release/overflow pipe to Switch between and... At PlumbersForums.net, Welcome to PlumbersForums.net - the international free order to any. Desperate now, its been going on for ages ( although not had any problems through the summer?.... Ensure the handles are at a slower rate than you normally would location of filling-loop! Boiler will still be working perfectly but I am desperate now, its been on. Valve, since they store the hot water flowing out of electric water tank through pressure-release/overflow?. In a lack of hot water goes cold ( usually when in the!! Boiler that 's the issue out of electric water tank through pressure-release/overflow pipe dry this... Not having to share incoming it could be due to a problem with my boiler boiler! The flow of the moment of hot water you feel confident to do so, as you might.. 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