^ This.

You don't drive 8 hours every day, yet you know you have to service your car.
Air cond used everyday for 8 hours, yet service once a year also never do.

Your air cond, you can maintain it smart or stupid as you wish
Don't be a bangang. Most fridges don't have a fan forcing air through the coils clogging them up, but they still need to be cleaned every few years. And seals need to be checked and replaced. Maintenance intervals may be very long, but who says fridges don't require maintenance?

same... those ppl never service car AC one, their AC last longer than mine that follow the service interval.