A control thermostat is a device designed to keep water at a constant temperature. It is preset for a specific temperature and will open and close its contacts to maintain that temperature.

A microprocessor carries out a number of electronic functions in an integrated circuit. The microprocessors found in BUNN equipment are used to control water temperature, water delivery, motors, and other integrated components needed for machine operation.

The multimeter is a handheld instrument designed to measure current, resistance, and capacitance. As one of the most valuable tools a technician uses on the job, it is important that it is used correctly. Before using a multimeter you should read the safety information and become familiar with the safety warnings and cautions. Taking the time to review the safety information is for your own safety as well as protecting the meter and all the equipment involved.