Wow. So the idea is that we want them to wear out more quickly so that they buy a new product that's more energy efficient? That strikes me as terribly wasteful. What about the impacts of a discarded appliance?
The compressor is almost certainly the most expensive part of the fridge. It's also one of 2 moving parts on fridge (the other the being the fan, which is cheap), making it the most likely to fail.
I checked some list prices, and they're a substantial price of the fridge itself. Some site said $200-$450 to replace one, another said the part itself is $100-$500 without even including labor. At those prices, I can see why people might just buy new. It's also something most people would want to hire a professional for; refrigerants are not good to inhale, and this needs to be air-tight.
I would also hope that most of them get refurbished. It's pretty hard to just "discard" a fridge. You have to call someone at the city (or GoodWill), and I presume they sell those to refurbisher. They're worth some money.
So I think in reality, it goes to a refurbisher who fixes it, then sells it to someone else who replaces and even older fridge. So the fridge that actually ends up in a landfill might be a 1960s deep freeze. The same idea as used cars.