When bleeding the radiators, air is released from the central heating system, which can result in a drop in water pressure. Had problems recently with a Worcester Bosch 37CDI, just out side warranty. This can trigger your boiler … The problem he says is that it will not re fire when the temperature reaches 60c but may go as low as 45/50C before relighting. When a boiler short cycles, this internal thermostat detects that the water in the heat exchanger is cooling and, although the temperature in your home has not dropped, fires up the boiler to reheat the water. When the boiler is being overfired it will produce a lot of steam in a short amount of time which will raise the boiler pressure and cause the boiler to shut down for safety reasons. Does anyone have any advice. every time i turn the hot water tap on the boiler fires up and then goes out somtimes it stays lit for anythink up to a minute before it goes out it keeps tryin … read more. You can confirm it’s a problem with the condensate pipe by pressing the reset button and when the boiler fires up, it should make gurgling noises before cutting out again. Leaks aren’t always obvious as they could be within the system, take a look around your home for wet or damp patches. That heat exchanger then … The boiler fires up for a minute, then cuts out, fires up, cuts out etc, although it doesn't lock out. The smarter way to find approved boiler engineers in your area. Try Boiler Guide today! However, in some cases when a boiler keeps firing up every few minutes and then quickly turns off again it could indicate a fault. Terms & conditions The boiler is used for both central heating and for heating up water in an unvented cylinder. Being outdoors means that the condensate pipe is prone to freezing during the winter, which can cause a blockage. A Gas Safe registered engineer will be able to carry out a repiping of the central heating pipes. Here’s How to Clear It. The thermostat may be faulty or in a cold draft which is affecting its capacity to measure monitor temperature accurately. Find the best boiler for your needs, or see how the latest A-rated boilers compare with each other and your existing one. Thanks again for all your help. To prevent a build-up, it’s highly recommended to have a magnetic filter installed. 0. My Boiler has started playing up (typical, always happens when it starts to get really cold). Glow worm combi boiler fires up for 10 seconds then shuts off . Reply. accredited professionals. However, after 30 - 40 minutes, the boilers cuts out and then starts cycling on and off. Worcester Danesmoor from 1996, serviced earlier this year. ... valves, pipework issues. I have a two year worcester boiler (just out of warranty:rolleyes:) when I turn it on the blue light is on but the green light only comes on for about 10 seconds before going out. If your boiler works but the radiators are not heating up, then the likely cause is a faulty boiler pump or your central heating controls. Worcester have offered guidance on the subject. What can cause a combi boiler to cut out? Boiler or pump overheating, pump making loud noises, central heating taking a long time to heat up. The pressure gauge should be showing a pressure of between 1 and 2 bar, anything lower than 1 is a sign of low boiler pressure. There are a couple of ways to clear air from the hot water and central heating system which can be done without having to call out a professional and we’ve put a guide together to take you through the steps: Airlock in Pipes? Airlock in Pipes? Alternatively, there could be a deposit build-up or a draught blowing the light out. The pipe that goes to rads is very hot, so I know that it kind of works, but I need more hot water to be sent out to rads for longer periods of time. If you don’t have the boiler manual to hand, we have a comprehensive list of boiler error codes for the leading UK boiler manufacturers: The best way to get your combi boiler working properly again is to hire a heating engineer to diagnose the boiler, find the fault and get it repaired. Let me know how you go on re contacting Worcester . your requirements with pre-screened companies to ensure you’re only contacted by trusted & If the boiler is too big it will be producing more steam than it can condense which will cause short cycling. The boiler (don't know output) fires up normally and after ~ 20 minutes reaches its setpoint of 65C, over the next few minutes it will creep up to 70C and then cut out, again fairly normal if min boiler output is > heat demand. For rectifying the problem, please check the below-mentioned things: He also found the igniter electrodes were corroded and replaced these too. 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