ScottG wrote:
Some good and some bad info here.
Fridges have indeed been built the same for at least 30 plus years. They are not as sensitive as they were back in the 80's or earlier.
If you damage a fridge, which begins in as little as 15 minutes, no amount of turning it upside down or letting it sit will fix it. This is because when the amonia over heats, it separates and turns into a solid that resembles ceramic and there's no way to fix it other than replacement.
The damage is also cumulative. You can overheat it many times and create a minor blockage that only shows up as decreased cooing capacity when it hot outside.
As for these fridges being weak, mine has not problem keeping things frozen solid in temps well over 100.
As a final note, many of the fridges are poorly installed. You can pull them out and find roofing material covering the top vents, poorly formed "chimenys" or setbacks from the back wall that aren't per the manucaturers guidelines.
A great winter time project is to get out your manual and pull your firdge out so you can make sure it was installed right.
""The sodium chromate in the cooling unit keeps the water within the cooling unit from causing corrosion. Off level overheating of the boiler assembly can alter the composition of the sodium chromate, where the sodium chromate loses its ability to inhibit corrosion causing internal corrosion of the cooling unit tubing which may result in rupture. The sodium chromate may also cause blockage in the cooling unit."