About a month ago, we got an electric shower to replace our old one, which was defective.
I've noticed recently that the new electric shower starts making a humming/buzzing noise after it has been running for about five minutes.
It sounds like it could be a normal "motor" noise, but the old shower didn't make a sound like that - or if it did, I couldn't hear it over the running water - so I don't know if anything is wrong.
Then again, the old shower was defective.
I never had an electric shower before those two, so I don't know what they're supposed to sound like.
Other than that, the new shower is working perfectly.
Is it normal for electric showers to make noise?