Slow day, so I'll post a question The month before my car warranty expires I get the car to the dealer to have it gone over thoroughly to see if there are any warranty issues that can be identified and fixed prior to the warranty expiring. I thought the same could be done on a geothermal system by paying a professional to thoroughly go over the unit. This check may include some things that are not normally done at a yearly (or semi-yearly) inspection. I listed everything I could think of without pulling out the manual. Check door and comfort alert lights for error messages. Inspect/replace air filter Inspect/clean air coil Inspect/clean blower cage Flush condensate line Check loop pressure (closed loop) Check flow rate Check air temperature delta Check brine pressure delta Heat of Extraction/Rejection Calculation Heat strips amp draw Compressor amp draw Compressor winding test Start/Run Capacitor test Blower amp draw Circulator pump amp draw? DSH temperature delta Check freeze protection level? System function test (all stages, aux, and emergency heat.) What did I miss?