The themostat in my nan's shower completely went last year, so she had to get a whole new one; it was cheaper than getting the old one fixed.

The only problem I've had with my shower is the join from the hose cracking. I sent a photo of the damage to the landlords, taped up the damage with waterproof duct tape, and it still took them six weeks to fix it! I'm kinda glad I'm leaving this house.