Don’t panic though. The radiators only get hot again when I run off the hot water in the bath for 10 mins or so. Grab your copy now for all the DIY help you need right at your finger tips! 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. We have teamed up with the industries best to help you find a trustworthy tradesman local to you! We cannot and will not give advice on the installation or repair of boilers for your own safety. 20 Frequently asked questions. 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. 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. Whereas on the other hand, if there is too much pressure your heating system will also fail. by htg engineer » Tue Oct 16, 2012 5:13 pm. The electricity supply. 16 Keeping your system topped up. 9-11 Hot water storage cylinders. Please help. I have checked the electric to the fan pump pressure switch etc and all is ok. 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). If however, you continue to have no hot water, and you suspect there is a boiler water leak, be careful before you touch anything. Hi, My Worcester Junior 28i boiler is five years old. 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 … 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. 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. Some days it works perfectly. When both heating and hot water are switched on they work fine until the hot water gets hot and then the radiators go cold. Classic symptom - it starts off fine and then runs cold after, ooh, 20 seconds, a minute, whatever. #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. Boiler problem 1: no hot water. 2:41. Replace the heat exchanger with a new one. 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. Controlling your heating and hot water. Low boiler pressure. You can usually identify if your boiler’s pressure is too low by taking a look at … Hearing a strange rumbling noise similar to when a kettle is boiling? 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 … it's hotter overall, and less variable, but still varying). Established for over 40 years, DHS is one of the largest central heating installation businesses operating in the South West. Dependant upon where your boiler is situated, this can be a real pain to do, especially with Worcester boilers. 12 Water supply. When the shower goes cold, and hot, and then cold again it’s natural to blame the combi boiler for the problem. Place the bucket under for 10 seconds and remove it - measure the number of litres and times x 6 to get 'litres per minute'. Boiler is kettling. Then test the temperature again with a thermometer. 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. 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 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). Combi Boiler - Hot Water Running HOT and COLD - Duration: 2:41. 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. Hi There, I wonder if any of you guys can help me out with a possible fault diagnosis. You might need to remove a cover to access the thermostat, and it’s often one that you adjust with a screwdriver. DIY Doctor has the answer! I have a Worcester 24i RSF combination boiler and have experienced an intermittent fault recently. 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. How often should I need to top up the pressure in the heating system? 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. The boiler started... Messed up hot and cold water supply to bathroom mixer tap! 14-15 Simple ways to protect your heating system. Which means, your hot water supply quickly turns lukewarm/cold. 19 Top tips for saving energy and reducing running costs. They are perfectly able to heat your home and provide hot water, without the need for a separate water tank. Combi boilers are high-efficiency water heaters and central heating units. 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. 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. Learn As I Do 2,778 views. 26 Other technologies from Worcester for your home. Well, if no, then we certainly do! 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. 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. Then measure again for 10 seconds. 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 heating system properly. 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. If option 1 yields no results and keep it mind that this option doesn’t 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. Boiler Is Leaking. However, you have to bear in mind that to access these heat exchangers; the entire hydraulic block has to come out. Experience and knowledge to advise you on all aspects of your heating system will also fail,! 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