CSLB C-36 Plumbing ContractorService, Repair, and MaintenanceEasy
A client complains that their dishwasher is not draining properly, leaving standing water in the bottom of the tub after a cycle. You've already checked the drain hose for kinks and cleared the food trap. What is the next most probable component to inspect?
- AThe float switch.
- BThe air gap or high loop.
- CThe heating element.
- DThe spray arms.
Show answer & explanationAnswer & explanation
Correct answer: B. The air gap or high loop.
After checking for kinks and a clogged food trap, the air gap or high loop is the next most common point of blockage or malfunction that prevents a dishwasher from draining properly.
Why the other options are wrong
- A. The float switch detects water levels and prevents overfilling, but a stuck float switch would typically prevent filling, not draining.
- C. The heating element affects drying, not draining.
- D. The spray arms distribute water for cleaning, not for draining.
Dishwasher Drain Issues
Common problems causing standing water in a dishwasher, often related to blockages or malfunctions in the drain system components.
- Kinked drain hose
- Clogged food trap
- Blocked air gap or high loop
- Malfunctioning drain pump
Memory trick: Drainage woes? Check the hose, then the gap's flow!