5. The pointer needs to be in the green section, if your boiler isn’t colour coded, then the pressure needs to be between 1 – 1.5 Bar. That heat exchanger then … Hi I have a firebird 90 boiler and when I switch it on the burner keeps tryin to fire up but cuts out again after a second or two. You see, during normal operation, when a gas boiler receives the call for heat, the gas valve opens and releases a small amount of gas into a sealed combustion chamber via small “jets”. A loud banging noise coming out of a boiler is surely a matter of concern. 12:03 pm ... Combi condenser boilers are not to be trifled with for that reason. When the boiler fires up the flame sensor has to detect a flame. Anyway my daughter’s boiler would fire up and go for about 20 seconds then cut out. Well, there can be two reasons to this- If your boiler makes a single BANG only when it fires up, it’s most likely […] Then after a minute of hot water running, getting the temp up to 50, then I turn CH on and it seems to stick for a bit. I tried ringing a few local plumbers and they are not able to come out until Monday. It will fire up and run for about a minute and then cut off for a few seconds and then fire back up. If I press reset it does nothing. ... empty what you think may be a boiler full of water out, then open up the bleed valve on the radiator nearest to the boiler. My Ferroli Modena 80E combi boiler fires up, then a few seconds later switches off. Ideal man turned up, cover off, ran the hot water and stuck his hand in to feel the plate. Water too hot, mixer reduces flow of hot water. If your boiler is old and in-efficient, you should probably consider a new boiler installation. 3. Yeah with the photocell in, and running without my interference, then the boiler attempts to fire over and over but never cuts out. The hot water and radiators are all working fine at the moment. The mess caused by the back boiler conversion is temporary, and the installer/s will clean most of it up for you. You can get a back boiler replacement for as little as £17 per month. I can hear water spitting for a couple of seconds. It keeps doin this for a good few times b4 it finally fires up. In the past, they were the most used boiler, and back boilers can be quite messy when taking them out and replacing with a combi boiler. The oil now in the plastic viewing tube is on the "need to top up" marker which, I presume, might explain why there's enough oil in the system to fire the boiler up, but not enough to keep it going, hence the boiler fires for 30 seconds and then cuts out again. Find out what replacement you need along with costs (takes 60 seconds). Has anyone had a similar problem? When I turn the kitchen hot tap on, I can have the water running for up to 30 seconds before the boiler fires … That gas is then ignited by the pilot light and the jet flames heat up a “heat exchanger”. Ricardo. It was sort of an intermittent fault that’s been happening for over a year at least. Repeat from 1. If you require removal of your back boiler and would like to convert to one of the latest, energy-efficient combi boiler then get a fixed price on a new boiler now. The temperature shown on the boiler display very quickly drops back to the 30 or so degree level where the boiler cuts in again. Every time we turn the hot water tap on, it fires up and gives us hot water for about 20 seconds, then the boiler starts banging and cuts out. Answer Save. 1 Answer. What is the fault likely to be on worcester 24i combi boiler? Same with the reset button nothing is happening. In the 1960s, it started getting popularity; in the 1970’s and 1980s, it was able to get to its highest success. Boiler shuts down and water turns cold. When I run a hot tap the combi boiler fires up and heats the water. Common Fault 5: Baxi 105e combi boiler – no hot water. Water too cold for a bath. etc. IS YOUR boiler making a loud banging noise? Can you suggest some simplified ways at maybe been able to fix this problem thanks When our old, normal boiler fires up, it messes up the DAB radio in the kitchen for a second or two. It can stay on for up to three hours, but generally cuts out after an hour or two. My money would be the boiler and not the thermostat, but you could take the communication wires out of the thermostat and twist them together for awhile to see if your boiler stays on. If that's happening then the water flow from another tap/shower might not be enough to keep the boiler firing. Anyone in that case would wonder as to why the boiler makes banging noise when firing up. If the old boiler was doing the exact same thing as the new boiler then the boiler is not the fault.It is possible that you have some kind of blockage in the radiator pipe work.The boiler is not getting rid of the heat as there is no circulation,that would explain why it fires up for a minute then shuts down. With the h … read more I tried the same thing as earlier in the week and nothing is happening. I do have a bowl underneath to catch any water, I thought the rubber seal at the top of the central plastic pipe might be not sealing properly. Then a thimble full of water. The status indicator light is on red; I reset the boiler, it fires up for a few seconds, the light is green, then it cuts of and the light stays red. Alternatively, there could be a deposit build-up or a draught blowing the light out. A noisy boiler is often caused by “Kettling”, which is a build up of limescale in the heat exchanger. 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