F
fionap
Our Cooper Menvier is only 4 years old and had its battery replaced because it periodically makes a loud humming noise that goes on for up to 40 minutes before stopping. It does this every few days, sometimes for a few days running. We called out the supplier and they changed the battery 4 months ago because they couldn't find anything else wrong - they charged over £100 to do this. Now it's doing it again and they want £80 call out fee to come and look again! Can anyone help with what is wrong and what we can do please?