It seems to be worse when the weather is bad. The fast flashing Hot water light shows as an air flow problem in the manual, thanks in advance for any help!!!!! To find out what the error code means, consult your boiler manual or have a look on our Fault code page for Viessmann boilers. 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. I've a Worcester Bosch Heatslave Combi (oil) with intermittent hot water. It seems to be worse when the weather is bad. If your home runs on a combi-boiler, then low pressure may be the reason for your lack of hot water. Boiler problem 1: no hot water. 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. in the Gas Engineers Forum area at PlumbersForums.net, Reply to Worcester 28CDi Intermittent Fault. If you have a combi-boiler, you’ll be used to having on demand hot water day and night, whilst those using a conventional or system boiler will know when to expect a supply of warm water to be available for bathing, showering or washing up. For a better experience, please enable JavaScript in your browser before proceeding. 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. Hot water fluctuates between hot and cold or hot water is unstable. Something is restricting the amount of hot water and the constancy of hot water leaving the boiler. 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. Does a new boiler need a gas safe certificate? Boiler is giving hot water. ... Worcester on the case. Heating/Hot Water Issue - Unknown problem! Some fault codes can be easily rectified yourself with a simple boiler reset, whilst others may need professional attention. Expert: Andrew Smith replied 3 years ago. If there are no instructions for this or if you have any doubts, be sure to seek the advice of a qualified engineer. Nightmare!!! 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. carries on like this all evening. Take care not to mistake condensation for a leak. Low boiler pressure. Boiler is kettling. This was on a Worcester … Ensure system has appropriate electrical polarity. Some boilers may have a timer to control the hot water. 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. If the tank has run dry, this could be due to a problem with the ballcock seizing and preventing it from refilling. I checked the boiler (Vaillant EcoTec approx 7 years old) and discovered the pressure had fallen to … 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. Hearing a strange rumbling noise similar to when a kettle is boiling? Test a hot water tap as well. You are using an out of date browser. in the Gas Engineers Forum area at PlumbersForums.net, Welcome to PlumbersForums.net - The international free. Share this conversation. How difficult is it to install a heat pump? The heating is working perfectly but I am have no hot water. How to make an old home more energy efficient. Don’t panic, here’s what to check. Worcester boiler problems with heating are often evident through the temperature of the water coming through your taps or within your radiators. You may also want to check your main fuse box. Water and heating - not heating only. If you have experienced a recent power cut, this may have also affected your boiler settings. I am desperate now, its been going on for ages (although not had any problems through the summer?). Worcester Greenstar 30CDI Combi - intermittent hot water. You can only find it on a combi boiler because they heat the water on demand. 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. However, regardless of not having to share incoming it could be a flow fluctuation issue. The boiler will still be working perfectly; however, the flow of water between the heat exchange will be reduced. Intermittent hot water is a real danger sign, call a gas plumber straight away 0208 520 3466. 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. Hi, I have a problem with my boiler. Get your new boiler today and get up to 12 years guarantee for that extra peace of mind. Boiler pressure is simply the balance of water and air within your boilers sealed system. Is your hot water cycling hot and cold? I have a 3 year old combi boiler - Ideal i-mini 30 which works ok for heating and hot water. Hot water goes cold(usually when in the shower!) 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!!!! When lime … for 11 years. Also make sure there is a water supply - if no water comes from the taps, there may be a temporary supply interruption. Look for patches on ceilings, peeling or flaking paint on or around pipes, swollen woodwork and mould patches. The cottage walls are very thick. Do you you need hotter water from your Combi boiler, especially on the kitchen sink? Gas combi boiler - intermittent hot water. Take care to observe the gauge at all times to avoid over-pressurising the boiler. You should find that the filling loop handles are at a 90° angle to the flow of the pipe. 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. Works fine from cold start up but then after a few hours we get 10 seconds of hot water then cold then hot etc.. 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. 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. Find the location of your filling-loop and pressure gauge. carries on like this all evening. Hot water goes cold(usually when in the shower!) If your home runs on a combi-boiler, then low pressure may be the reason for your lack of 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. Once you have restored the correct pressure, ensure the handles are fully closed. Just wondered if there were other things to try first since the circuit board sounds expensive! 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. Leaks often occur at joints in pipework which are usually visible, so these are a good place to start. Reply Reply Author ... And yes the heating was fine just the hot water was an issue. Is a broken boiler covered by home insurance? The first thing you should check if you have no hot water is whether or not your boiler is working. Finally, make sure you have a gas supply by checking other appliances such as your gas cooker. It may not display this or other websites correctly. Intermittent central heating failure. Combi boiler intermittent hot water in shower. If you are not sure how to fix the fault code, it is recommended to contact a qualified engineer for advice. Primary Flow Switch – Pressure differential, Diaphragm, Reed. The electricity supply. 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. It should be easy to see at the timer control panel if the boiler is currently active for hot water. The first thing you could check is that your boiler is receiving the power it … Slowly turn both of the filling loop handles until they match the direction of the pipe - as you do this, you should be able to hear water flowing. Leaks can also cause other problems associated with damp which may lead to significant damage. System and conventional boilers don’t require a diverter valve, since they store the hot water in a cylinder. Worcester Greenstar 30CDI Combi - intermittent hot water. http://www.ukplumbersforums.co.uk/central-heating-forum/42241-notice-gas-safety-related-advice.html. There is always a possibility that the settings may have been adjusted without your knowledge or by mistake. Combi Boiler Intermittent Grinding/ Vibrating Noise. 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. You simply have to run the hot tap at a slower rate than you normally would. If your pressure is below the normal operating range, follow this guide to re-pressurise. This is a special part of the system which allows your combi-boiler to switch between hot water and heating. 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. Important: Be sure to consult the operating manual first to ensure that you are able to re-pressurise the boiler yourself. Header tank valve replaced, noise diagnosis help! 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. If you hear a boiler noise while having intermittent hot water it is like scale as well. It may be easier to get somebody you trust to help you. Also check that the hot water is set to a reasonable temperature. 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. 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. The best thing to do when your Worcester Bosch boiler isn’t producing any hot water is to contact a Gas Safe registered engineer. 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. Gas Safe Register | Ensure your gas engineer is registered. This may have been affected by the clocks changing, power supply, back-up batteries failing or even somebody altering the settings without you knowing. It may be worth the investment in water softening systems to save on many of your household appliances. Another factor to consider before calling an engineer or plumber is to check your timer. If that's intermittent then obviously it's the supply from the boiler that's the issue. We live on the hills as well so when I say windy I mean the house was shaking! Water problem has been the same with central heating on or off. The boiler is a Worcester-Bosch Greenstar 25si, if that's of any use. 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. 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. No fault code. Hi, I have a problem with my boiler. Calorifier – Cylinder and Coil or Plate. Engineer changed the PCB , Fan & 3 sensors. The correct pressure level will often be indicated on the gauge for modern systems with a green area. Discuss Worcester 28CDi Intermittent Fault. One sign of this is if you need to turn the central heating to maximum in order to get any hot water. Post Jobs Here, Coronavirus SARS-Cov-2 virus and COVID-19 disease, Worcester 28CDi Intermittent Fault. Adjusting your timer may resolve 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. It runs w … When does a new boiler need its first service? Worcester Greenstar 30CDI Combi boiler. Hot water goes cold(usually when in the shower!). Combi boiler issue - heating and hot water. In the long term, it may be cost effective to upgrade to a larger boiler if this is the case. 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. I have an engineer coming tomorrow but he said its just coincidence with the wind and it sounds like the circuit board needs replacing. Touch the plate heat exchanger at the back of the boiler. Looking for a Heating Engineer? This guide will help you to identify and solve common causes for hot water problems. Is it possible that the flue could be too short, and not getting enough clearance? Hot water flowing out of electric water tank through pressure-release/overflow pipe? 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. Hot water is something we tend to take for granted and expect to be available when we need it. 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. However, for the past 6 - 9 months has developed a bad intermittent grinding/ vibrating noise. If the diverter valve is not working properly, it could be stuck in the central heating position or may have developed a fault. An expert will be able to advise you of the optimum boiler size for your home based on your current and future needs. JavaScript is disabled. Time heals all wounds. Remove the cover of the boiler and run hot water tap. How to patch a hole in a toilet waste pipe. Broken diverter valves Whilst this may seem obvious, it is easy to overlook in the heat of the moment. A bit irritating when you're in the shower, as you might imagine. Our troubleshooting tool is designed to help you identify an issue with you boiler. If your boiler timer controls your hot water, this may be the cause of the problem. Before beginning, make sure you can see the pressure gauge at all times whilst accessing the filling loop. 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. You may wish to look at the following options if you feel confident to do so. Discussion in 'Plumbers' Talk' started by acerpalmatum, Oct 21, 2017. acerpalmatum New Member. 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. 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. 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. 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. rain water coming into Ideal Combi boiler through flue and causing main circuit board to blow. Get your free quote from a local installer, No hot water? If you are not sure, check your timer manual. 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. Surely this could affect the vent? You can usually identify if your boiler’s pressure is too low by taking a look at … Have bypassed external thermostatic controller however has made no difference. A problem with the diverter valve will require the help of a professional Gas Safe engineer to fix. Use our FastTrack service to get your new boiler installed hassle free. Test the electrical circuits by checking for short circuits, continuity (earth) and resistance (to earth). In cold weather, combi boilers can experience ‘low flow rates’, which may lead you to think your combi boiler has no hot water. However, there are two sides of coin to think about: Warm your home with Worcester Bosch, the only boiler brand to be recommended by Which? Do you want to learn what might be causing it and how to fix it? 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