Test all door interlocks. Check the OEM manual as each manufacture has its own requirements for this very important safety test. Inspect the power supply and heat station using infrared thermal imaging, which identifies hot spots and provides information that can be used to identify potential problems during operation. Check the OEM manual. Check water-cooling hoses.
Hoses become brittle and are susceptible to leaks and complete failure.
Use only the same type of nonconductive hose as originally supplied, and never shorten the length of any hose when replacing it. Wipe the inside of the power supply and heat station interior using plain hot water and detergent to remove any loose dirt. Allow the unit to dry before starting it. Rust spots on the floor of the cabinet should be removed by sanding and painted using white enamel, which makes it easier to detect leaks later. This practice allows a large amount of dirt to get into the unit, which is not easily removed.