22-25 Annual servicing. Hi, My Worcester Junior 28i boiler is five years old. Keep up to date with our DIY projects, tips and latest deals. Re: Worcester 28CDi Intermittent Fault. The radiators only get hot again when I run off the hot water in the bath for 10 mins or so. Hot water then cold water then hot with conventional heating system, Baxi combi boiler flow problems and running hot then cold, radiator hot at top,cold at bottom,then cold allover. The boiler started... Messed up hot and cold water supply to bathroom mixer tap! It usually blocks because of sludge in the heating system, and it really is a common problem with these systems, especially in installations where the fitter didnât flush the heating system properly. He was sceptical but eventually, having eliminated a boiler problem, he checked with a plumber mate. We have teamed up with the industries best to help you find a trustworthy tradesman local to you! Boiler problem 1: no hot water. Low boiler pressure. Boiler is kettling. Now repeat this but turn the hot tap off slowly until it runs cold - try and find the max rate of flow where it doesn't heat the water. Well, if no, then we certainly do! If option 1 yields no results and keep it mind that this option doesnât always work in the first place, option 2 would probably offer the favoured result, as with the heat exchanger all the washers and O-rings are included. The boiler heats up to it's maximum of 85 degrees on the readout then stops firing up. Worcester 28 cdi rsf hot water problems Video 02 - … You can usually identify if your boiler’s pressure is too low by taking a look at … Problem with Worcester 24i boiler, the water keeps going cold? The water was never very hot, not even downstairs in the kitchen. Hearing a strange rumbling noise similar to when a kettle is boiling? Each page also comes with pictures and a video to make completing those jobs even easier! Without the build-up of water pressure inside your boiler, it simply won’t be able to heat water. If a lot of cold water goes into the tank, more condensation will be produced, so firstly, ensure you are not mistaking a leak for condensation. Learn As I Do 2,778 views. Hi There, I wonder if any of you guys can help me out with a possible fault diagnosis. The situation has now started to get worse and in order to get hot water I have to open the hot water tap only partially. Probably a split or stretched diaphragm, do you find it worse when there's more demand on the cold mains (first thing in a morning or tea time). The first thing you could check is that your boiler is receiving the power it … Whereas on the other hand, if there is too much pressure your heating system will also fail. No hot water means cold showers and a chilly home - everyone’s worst nightmare. When the shower goes cold, and hot, and then cold again it’s natural to blame the combi boiler for the problem. Hi I have a Worcester combi boiler and recently the water from the hot water tap has started as hot but then run cold and back to hot. My Worcester 24i goes off after a few minutes both in hot water and heating mode.Some times it comes bock on after a while. I have a Worcester 24i RSF combination boiler and have experienced an intermittent fault recently. However, if the flame is steady while someone else is showering and reports the water going hot and cold you may have a different problem. The electricity supply. Hot Water Going Cold With A Combi Boiler? Established for over 40 years, DHS is one of the largest central heating installation businesses operating in the South West. All Worcester combination and system boilers need their system pressure to be topped up with cold water from the mains at some point in their lifetime. Combi boilers are a lot more reliable than they were ten years ago. 9-11 Hot water storage cylinders. However, combi boilers are prone to the common problem of causing the hot water to go cold or lukewarm and then back to hot again. Hot Water, Then Cold, Then Hot, Cold and so on! Before that time (around 15 years ago) combi boilers were only just incorporating condensing technology and went through a period of change and fine tuning. Dependant upon where your boiler is situated, this can be a real pain to do, especially with Worcester boilers. DIY Doctor has the answer! Now, combi boilers are considered high-efficiency water heater and central heating units, which means that they can both heat your home and provide hot water, without the need for a separate water tank. 12 Water supply. by htg engineer » Tue Oct 16, 2012 5:13 pm. Since then, I more carefully checked the kitchen tap and that is also oscillating between hot and cold, but to a lesser degree (i.e. However, combi boilers are prone to the common problem of causing the hot water to go cold or lukewarm and then back to hot again. Based in Bristol, the company sells, installs, maintains and services all types of gas, oil and solid fuel systems in both domestic and commercial applications, WE ARE NOW OFFERING OUR BOILERS ON FINANCE. Boiler Efficiency: Why Is So Important And How To Calculate It, Guide: Everything you need to know about central heating radiators (2020), Remove the heat exchanger and descale it using a descaler such as. If however, you continue to have no hot water, and you suspect there is a boiler water leak, be careful before you touch anything. Combi Boiler - Hot Water Running HOT and COLD - Duration: 2:41. When the heating system is cool, the pressure should be between 1 and 1.5 bar on the pressure gauge (the indicator needle would usually be in the green section). Afterwards, we noticed that the bathroom water was oscillating between hot and cold, and that we couldn't run a hot bath. Grab your copy now for all the DIY help you need right at your finger tips! Hot water goes cold heating goes cold? There are no hot and cold storage tanks or expansion tanks to worry about, … 19 Top tips for saving energy and reducing running costs. Way to check this is to make sure the heating system is cold, turn on a hot water tap and leave it running, check to see whether the boiler stays lit all the time the tap is running, if so, check the heating flow pipe - if it is getting warm then the diaphragm in the diverter valve needs replacing. #1 - Thermostat/timer fault If you’re savvy with your tech or keep a watchful eye on your energy usage, you’ll likely be using your boilers timer to control when it’s in operation. Recently, when I ran the hot water, I would get around five minutes of... Bath hot water only 1/4 filling up then water runs cold then no water 20 Frequently asked questions. But this also comes with one common problem of causing the hot water to go cold or lukewarm and then back to hot again. A lot of Worcester boiler faults are noticeable initially through having trouble heating your home. 16 Keeping your system topped up. You might need to remove a cover to access the thermostat, and it’s often one that you adjust with a screwdriver. If your Worcester boiler is leaking, this can cause low pressure and the boiler to … Some days it works perfectly. I have checked the electric to the fan pump pressure switch etc and all is ok. Boiler Is Leaking. Initially it was the shower hot water going cold after around 3 minutes, then after a few more minutes of cold water it would go hot again and so on. To explain this in detail we need to delve a little into combi boiler theory first. I have had the gas repair man in twice he has put a new flow switch in, but still the water goes cold, but it has not done it while he was here it seems to be when i have the heating on, the boiler is not fireing up for the water, can someone please help. However, you have to bear in mind that to access these heat exchangers; the entire hydraulic block has to come out. This has gradually got worse and now the situation is … Worcester boiler problems with heating are often evident through the temperature of the water coming through your taps or within your radiators. Could be the diverter valve letting by hot water on the heating side. Receiving heating but no hot water from your boiler is more likely with a conventional or system boiler that has a hot water cylinder. However, it is highly recommended that you use an expert to carry out the needed work, such as DHSâ boiler maintenance in Bristol. If you notice that the pressure gauge on the front of your boiler has dropped into the red zone, it’s an indication that your boiler … Modern combi boilers are just perfect for not taking up a lot of space in the home, whilst giving you instant access to hot water and heating day or night – at a moment’s notice. We have the experience and knowledge to advise you on all aspects of your heating and plumbing requirements. What's the difference between a Boiler and Water Heater? Combi boilers are high-efficiency water heaters and central heating units. Don’t panic though. Replace the heat exchanger with a new one. 26 Other technologies from Worcester for your home. Then measure again for 10 seconds. Hot water goes cold(usually when in the showe You need a 'Registered Professional Gas Engineer' in to look at your boiler. Please help. It usually blocks because of sludge in the heating system, and it really is a common problem with these systems, especially in installations where the fitter didn’t flush the … Water doesn't cycle hot to cold to hot. After some help with my boiler please… Worcester Bosch 280 rsf combi fitted and for some reason when using the shower the water temperature fluctuates. Once the heating comes on, this will dry up and be nothing to worry about. I read about a faulty mixer allowing mains pressure cold water into the system thus diluting the hot water and when the gas engineer came out a second time, I suggested that to him. DIY how to tutorial projects and guides - Did you know we have a DIY Projects section? 14-15 Simple ways to protect your heating system. it's hotter overall, and less variable, but still varying). Symptoms like these are usually signs of a blockage in the hot water heat exchanger in the boiler. How to check for a bad dip tube If you’re unsure whether or not a bad dip tube is your problem, check for these 2 bad dip tube signs: 1. Powered by phpBB ® Forum Software © phpBB Group, General Building, Self Build and Renovation, Planning Regs, Project Management and Safety. Instead, it mixes with the hot water at the top of the tank. Place the bucket under for 10 seconds and remove it - measure the number of litres and times x 6 to get 'litres per minute'. We cannot and will not give advice on the installation or repair of boilers for your own safety. When lime … Classic symptom - it starts off fine and then runs cold after, ooh, 20 seconds, a minute, whatever. 2:41. It starts off getting hot which is taking longer than usual. Which means, your hot water supply quickly turns lukewarm/cold. Worcester Junior 28i problems with hot water running cold. They are perfectly able to heat your home and provide hot water, without the need for a separate water tank. Again, the effect will not be instant – you need to wait for the water to cool down, or you can empty the tank’s hot water by turning on a hot tap. Then test the temperature again with a thermometer. Symptoms like these are usually signs of a blockage in the hot water heat exchanger in the boiler. Worcester 24i junior producing very hot then cold water cycles ***** Update 2020 ***** Engineer that worked on my boiler is no longer accredited with Worcester Bosch. Within this area of our site have literally hundreds of how-to guides and tutorials that cover a huge range of home improvement tasks. When both heating and hot water are switched on they work fine until the hot water gets hot and then the radiators go cold. How often should I need to top up the pressure in the heating system? Controlling your heating and hot water. If pressure is below 0.5 bar (down in the red section), water has been lost from the system and must be replaced. And when this happens, cold water no longer gets pushed down to the bottom. What happens is that the internal waterways in these exchangers are so narrow, that a coating builds up to the point the boiler can no longer force through the 'boiled' water into it. I'm guessing its a problem with either the actuator valve or the thermostat (the thermostat is located on the hot water cylinder and is wired into the actuator). 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