If the PCB isn’t working, it won’t receive the correct signals. So, it might think the boiler fan isn’t working, even when it is. The Fix We certainly strive to provide the best possible customer experience. Consequently, we understand that sometimes a product may not meet your expectations or requirements. That is why we offer a comprehensive 30-day return policy to ensure your satisfaction. Please read our full Return Policy The boiler is waiting – the actual temperature is higher than the calculated or selected boiler temperature. This means there is no signal from the flow temperature sensor available – connect the plug to the flow temperature sensor correctly or the temperature sensor could need replacing.

The draught a fan creates into the flue should counter any draught trying to get into the flue (i.e. wind). The Fix This means there is no BUS communication cable, EMS-Bus isn’t connected or damaged – connect the cable for the EMS-Bus or replace the damaged cable exchange fuse. This means that airflow has been present during the last 24 hours. Or there may be an issue with the fan operation. That should shed a bit more light on your situation. But if you’re still concerned, give BOXT a ring and we’ll have a chat with you to discuss further. From 8am - 8pm every weekday, we’re here to help you get your boiler up and running again. Call us for free on this number, 0800 193 7777.

What’s Next?

If it’s not faulty, a diverter valve should prioritise providing hot water to your taps and showers - over your central heating. So, as you turn a hot tap on, the valve should be tightly closed, preventing hot water from flowing to your heating pipes. This way, you can have optimum hot water for your taps and showers - rather than having to split the hot water with your radiators. As fuel (gas, LPG, oil) burns in the combustion chamber, the process releases harmful gases. This is why each boiler requires a flue — a large white pipe that’s fitted to the boiler. You’ll either have a vertical flue (going through a roof) or a horizontal flue (going through a wall), and it’s this flue that takes harmful gases away from your property. This means the heat control module (HCM) is void. The current HCM doesn’t correlate with the control box. For any Worcester Products related products please clink below link : Worcester Spares Prices: Please note all prices are inclusive of VAT. At Heating and catering parts, If you’re seeing any of the error messages above on your boiler, chances are there’s a fan problem of some sort. Boiler Fan Noise

Worcester boiler faults tend to occur very rarely due to the quality and reputability of their components. As your boiler starts to get older and issues do start to show, you can use Worcester boiler error codes to diagnose the issue. It is important to keep in mind that the process of actually fixing any issues should be left to an engineer to be on the safe side. If you hear your boiler making noises that resemble humming, the sound may be produced by the boiler fan’s faulty bearings. This is especially likely if you’re also getting one of the boiler fan faults listed above. As we’ve mentioned, the PCB needs a signal showing the fan is working before allowing the boiler to fire up or continue operating. Sorry to bump up an old thread, but I've just had my fan on a 28i replaced by a service engineer at age 26 months. The new fan is working fine, but we got to chatting about the way repairs always involve swapping complete components and whether the fan PCB alone could be replaced. The engineer said he would be interested to know whether the circuit had failed due to moisture within the older enclosed plastic shell on this version, and I said that I'd take a look at the old board based on my (limited) hobbyist electronics knowledge (and perhaps with the help of my friend who services consumer electronics products for a living). The problem is it would be nice to know the values on the terminals of the plug and any other information relevant to testing the fan unit. The responses on the thread seem to be rather unhelpful. I shan't be putting the fan anywhere near the boiler as I am a firm believer in letting the experts handle gas appliances, but I wouldn't mind having a spare fan if the fault just turns out to be a PCB capacitor or similar. Can anybody describe the normal service test procedure (with fan disconnected from the boiler)? Your central heating pump may be the culprit when it comes to locating a leak and fixing a sudden drop in boiler pressure. The valve seal on a pump will wear down over time naturally, especially if too much pressure is placed on it or there is a sudden increase in water flow.This signifies there is an incompatible heat control module (HCM), meaning the control box needs the latest software. The boiler is waiting in response to a heat demand – the boiler regularly switches to partial load.

Worcester Bosch boilers are undoubtedly the best around. They outshine many other big boiler brands when it comes to their popularity, but why? They’re efficient, reliable, and award-winning – consistently taking first place in the Which? Gas Boiler and Best Buy reports. This signifies there is a flame signal without a flame present. The air/gas ratio control valve may need replacing. For old boilers that are out of warranty, a better option might be to get a price for a new boiler. You can get prices using this anonymous form from Heatable in less than 90 seconds (prices are displayed on screen). Top Air Faults That Affect a Fan’s Operation There may also be damage to the electrode or Ignition lead, without these parts a flame can’t be made.If it is, replacing damaged wiring and connections will fix the problem and clear the boiler fault code, ready for a reset. #4 – Faulty Unit The boiler notices an increase in air pressure (as the fan continuously pushes harmful gases up the flue, and they don’t escape), and will shut down. This means the water pressure is too low – the water needs topping up and the vent system or pressure sensor may need replacing.