OK. Thank you for checking. It sounds to me like you might have a dust blocked condenser coil, assuming you have such a coil in your refrigeration system. If air is not flowing through the coil to cool the refrigerant, the compressor's run cycle gets longer in order to compensate. The fact that everything's so cold indicates that the condenser coil needs to be vacuumed to remove the dust.
The coil should be able to be accessed by removing the rear cover panel. It looks like a miniature auto radiator, and it will most likely have a fan attached to it.