Dec 2, 2024 · Hi, we have a Daikin ducted system that's about three years old. Recently, it has been intermittently displaying the U4 error code. The system will often work f

Nov 26, 2014 · Don't be too hard on your installer, we're a team of dual trade electricians and refrigeration mechanics and even we can't explain Daikin U4 errors – though it doesn't help …