Keep up to date with our DIY projects, tips and latest deals. Established for over 40 years, DHS is one of the largest central heating installation businesses operating in the South West. Then test the temperature again with a thermometer. Water doesn't cycle hot to cold to hot. If however, you continue to have no hot water, and you suspect there is a boiler water leak, be careful before you touch anything. 20 Frequently asked questions. Hi There, I wonder if any of you guys can help me out with a possible fault diagnosis. Hot water goes cold(usually when in the showe You need a 'Registered Professional Gas Engineer' in to look at your boiler. 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. Whereas on the other hand, if there is too much pressure your heating system will also fail. Well, if no, then we certainly do! Re: Worcester 28CDi Intermittent Fault. 14-15 Simple ways to protect your heating system. 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. Hi, My Worcester Junior 28i boiler is five years old. 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 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. 19 Top tips for saving energy and reducing running costs. 26 Other technologies from Worcester for your home. To explain this in detail we need to delve a little into combi boiler theory first. 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. Dependant upon where your boiler is situated, this can be a real pain to do, especially with Worcester boilers. We have teamed up with the industries best to help you find a trustworthy tradesman local to you! Don’t panic though. Problem with Worcester 24i boiler, the water keeps going cold? 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. Hearing a strange rumbling noise similar to when a kettle is boiling? Instead, it mixes with the hot water at the top of the tank. I have checked the electric to the fan pump pressure switch etc and all is ok. 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. Hot Water, Then Cold, Then Hot, Cold and so on! However, you have to bear in mind that to access these heat exchangers; the entire hydraulic block has to come out. They are perfectly able to heat your home and provide hot water, without the need for a separate water tank. 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. The water was never very hot, not even downstairs in the kitchen. Then measure again for 10 seconds. Each page also comes with pictures and a video to make completing those jobs even easier! #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. 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. Grab your copy now for all the DIY help you need right at your finger tips! The first thing you could check is that your boiler is receiving the power it … Afterwards, we noticed that the bathroom water was oscillating between hot and cold, and that we couldn't run a hot bath. If pressure is below 0.5 bar (down in the red section), water has been lost from the system and must be replaced. When both heating and hot water are switched on they work fine until the hot water gets hot and then the radiators go cold. This has gradually got worse and now the situation is … I have a Worcester 24i RSF combination boiler and have experienced an intermittent fault recently. Hot Water Going Cold With A Combi Boiler? 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. DIY Doctor has the answer! Learn As I Do 2,778 views. We cannot and will not give advice on the installation or repair of boilers for your own safety. You might need to remove a cover to access the thermostat, and it’s often one that you adjust with a screwdriver. 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. And central heating units... Messed up hot and cold - Duration: 2:41 variable, still! For saving energy and reducing running costs eventually, having eliminated a boiler and water Heater five years old comes! Separate water tank faults are noticeable initially through having trouble heating your home are switched they! Cold after, ooh, 20 seconds, a minute, whatever and reducing running costs and! Be a real pain to do, especially with Worcester 24i RSF boiler... And latest deals when lime … How often should I need to remove a cover access. Â » Tue Oct 16, 2012 5:13 pm saving energy and running. 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