WHAT ABOUT FILTER CHANGES?
Unlike an automobile, the oil inside a hermetically sealed system will remain in useable condition until contaminants are introduced. These contaminants may be in the form of metal shavings due to direct metal to metal contact or by the introduction of outside foreign materials, such as moisture. In hermetically sealed systems rarely if ever do we come across filters that need to be changed. But on lower temp systems, systems that have had compressor burn outs or semi-hermetic, the chances increase that outside contaminants have been introduced. In these cases we recommend that the filters be monitored for one week, daily after installation. In the long run, its easier to change a filter than to change out an entire compressor.