The first point of call is always to check for leaks; this is the most common cause of a boiler losing pressure. Is there a DIY fix to increase the pressure of my Glow-Worm boiler? You’ll need to have someone to keep an eye on the boiler’s pressure, and let you know when it drops to 1.3 bar. Upon checking the boiler I could see an F22 fault code and could also hear some strange knocking sounds. Why does my boiler lock out, and will resetting it fix the problem? The F75 Fault code on the modern range of Vaillant Boilers (including the EcoTec Plus, Ecotec Pro, Ecomax and EcoFit) and the F9 / F75 Fault code on modern Glowworm boilers (including the CXI, SXI, Flexicom, Energy and Betacom) is probably the most common fault that we attend. Typically, there are two main culprits; the heat exchanger and the pump. The heat exchanger is extremely fragile. Then I noticed there wasn’t any hot water at all, at best it was lukewarm. Try to light boiler and it kicks in and then you can hear air int he pipes moving round and then fault code F5 shows. Remember, leaks don’t just affect your boiler. However, it’s likely that this is going to be a temporary fix for tiny leaks, rather than a proven way to fix large leaks in central heating systems. A combination of old age and limescale can lead to the plate on the heat exchanger cracking. Where do air locks occur, and can they be removed? High boiler pressure can lead to excess pressure being put on expensive components. A system with low water pressure, or the possibility of water temperature rise not being enough, is going to have a circulation issue. If you are wanting to find out more about what this may mean then this page will be able to help you. Boiler is 2 years old and has been working well. And, if they don’t work, a boiler repair company will be able to find and fix the problem for you. Vaillant F22 Fault Code Repair. The pressure release valve and expansion vessel help to regulate pressure in your boiler. Obviously, there could be several other reasons why a Glow Worm Flexicom boiler may start displaying the F4 and F22 error codes but now I’ve had some time to read through various web forums, I see this is a common issue. As we mentioned in the section about reducing water pressure, you can remove air locks from radiators and towel rails via the bleed valve. You may be guided through the fault finding sequence or steps, for rectifying your boiler with this fault code. I have a glow worm 80pp, I had to recently change my pcb board, however since then the the boiler works, but now have a new fault. Once your boiler drops below 0.5 bar, it’s likely to lock out. Most causes require a Gas Safe engineer so get free repair quotes today. There are products available such as Fernox F4, which is a leak sealer for central heating systems. Glowworm System 38 - space saver boiler B/F? Martin Smith an emergency plumber, who has plenty of experience when it comes to problems and one of them is the F9 fault Code on the Glow Worm Boiler.Here are similar questions asked about the Glow worm boiler F9 fault below. Reset seems to fix it and if it keeps happening I can bleed the radiators and reset and it will stay fixed for longer. So, you’ll want to check that the water hasn’t damaged other expensive components. Data & Cookies About Us Contacting Us Disclaimer. It’s unlikely that a boiler repair company is going to be able to fix the heat exchanger. Also, as my boiler was due a service, I arranged for a gas engineer to come out and give the boiler a once over, just to be sure. Using these bleed valves can be messy, so make sure you cover walls and floors, and have a container to catch water. What causes leaks, and the F.22 fault code to be displayed? Is there a DIY fix to repair leaks in my heating system? So, the leak could be inside the boiler, on the back of a radiator, or even coming from weak copper pipework that’s located underneath the floorboards. There are a range of DIY temporary fixes. The Problem With My Boiler. And, this is a good thing; air locks act like blockages and could be contributing to your system’s low pressure and inability to circulate water correctly. View online or download Glow-worm Flexicom 15hx Installation And Servicing, Instructions For Use Manual When boiler pressure is too low, many components will have to work overtime, wearing out more quickly than they should. Pilot light on but heating & water go off whilst on timer or when on demand I have to manually fire up the boiler, that worked for few days now it boiler won’t come on although boilers on and so is the pilot, any help will be appreciated please. Typically, we’d expect a replacement pump from a top brand like Grundfos, to cost around £250. There is an easy way to fix for most of the boilers with an external filling loop. Do You Consent to Our Data and Cookie Policy. Typically, we’d expect a heat exchanger replacement, to be in the region of £400-500, including parts. Hi There, we have Glow Worm Flexicom 15 Hx heat only boiler, the fault code F22 keeps shoing, there is no issue with the pressure and no issue with the heat ex. However, you should speak to an emergency heating engineer first. Fault … Now you have to reset the boiler. For those of you not in the know, here’s what those two fault codes mean: F22 – Low water pressure or ignition temperature rate rise too slow. And, that’s going to mean in the long-term, expensive repair bills. If not, expect the boiler repair company to suggest a replacement. Continued operation would likely damage both components, adding to the existing cost of repair. Is there a DIY fix to increase the pressure gauge as you do this, you’ll need to a! 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