Breville BDC455 Showing Fill Tank

If you have a Breville Precision Brewer (coffee maker), many of them use a nifty trick to determine if the water is low. Most of the time, you can rely on this message to show that the water is indeed in need of filling. However, since some of the Breville models use a prism to measure the water fill level, you might get this message even when the tank is full.

So here are some steps that will help you fix the “Fill Tank” message.

1. Fill The Tank

Yeah, I know it is obvious and not likely why you are looking this up online. But sometimes, we just need a little reminder to check the basics. If your tank is actually low take a moment to fill it and then use the extra time you have left to check out our YouTubeOpens in a new tab. 🙂

So if your tank is actually filled, the next thing you will want to do is:

2. Clean The Prism

When you remove the tank and empty it, you will see the prism/sensor, and this is your chance to give it a quick wipe. Just clean it up and re-fill the tank to see if your issue is cleared. Some models do not have removable tanks. Leave a comment below and let me know what you are having issues with, and one of the team members will figure out the solution for you.

If that didn’t fix the problem, we need to start looking at your surroundings.

3. Remove Over Powering Light Sources

Due to the way the sensor works, the sensor may be overwhelmed by a bright light. Move the coffee maker out of any sunlight that might be hitting the sensor if you need a way to test this, but don’t have a lot of “low light” areas to put your coffee maker. You can try covering the tank with a cloth to see if the message goes away.

If this is not fixing the issue, you might need to call for support.

From the USA, you will want to use: 1-866-273-8455 M-F 8-5 Pacific Time

I will also have another article about the error codes coming soon. Thanks for reading!

Spencer Heckathorn

Spencer loves to learn and try new things. He has been sharing his trials, successes, and failures, online since the early 2000s.