Red Seal Appliance Service Technician Practice Exam

Using a plumber's snake or a mixture of baking soda and vinegar is a highly effective method for clearing a clogged drain in a dishwasher. This approach utilizes both a mechanical method (the plumber's snake) and a natural chemical reaction (the baking soda and vinegar).

The plumber's snake can physically break up and dislodge debris that is causing the clog, reaching deeper blockages that may not be accessible through other means. Meanwhile, the combination of baking soda and vinegar creates a fizzy reaction that can help to break down grease and food particles, loosening them from the walls of the drain and allowing for easier removal.

This method is generally preferred because it is effective, non-toxic, and helps maintain the integrity of the dishwasher's plumbing without the harmful effects associated with harsh chemical drain cleaners. Other options, such as soaking in hot water, may not provide enough force or action to effectively clear a hardened clog, and removing the drain filter is more about access than actual addressing of a clog within the drain tube itself.