Red Seal Appliance Service Technician Practice Exam

What is the main reason for a dishwasher not draining properly?

1. Insufficient water supply

2. Clogged drain hose or filter

3. Faulty timer mechanism

4. Incorrect dishwasher settings

The correct answer is: Clogged drain hose or filter

A dishwasher not draining properly is often due to a clogged drain hose or filter. Over time, food particles, grease, and other debris can accumulate in these components, hindering the flow of water. If the drain hose is kinked or blocked, it will prevent the water from being expelled from the dishwasher. Similarly, a clogged filter can trap water, preventing it from draining properly. Identifying this issue is essential because a dishwasher that doesn't drain can lead to standing water, which may cause foul odors and could damage the appliance over time. Regular maintenance, such as cleaning the filter and inspecting the drain hose for obstructions, can help prevent this problem from recurring. Understanding the mechanics behind the drainage system aids technicians in diagnosing similar issues and ensures effective troubleshooting in appliance repair.