Roper Dishwasher High Loop vs Air Gap Installation: US... | appliancefaults.com

Technical Background:

The Roper dishwasher utilizes its MCU to control the drain cycle, energizing the drain pump and opening the drain valve. The high loop or air gap prevents backflow into the dishwasher, complying with US plumbing codes. Voltage paths to the drain pump and valve are crucial for proper operation.

Symptoms:

The Roper dishwasher is not draining properly, leaving standing water at the end of the cycle. Water may be backing up into the dishwasher from the sink or garbage disposal.

Possible Causes:

Improper high loop system.
Air gap clogged or improperly installed.
Drain hose kinked or obstructed.
Drain valve malfunction.
Clogged drain pump.
House drain issue.

Solution:

1

Disconnect power to the Roper dishwasher at the breaker panel.
2

Inspect the high loop. Ensure it's as high as possible under the sink, securely fastened to the cabinet.
3

Check the air gap (if installed). Remove the air gap cover and clean any debris with a small brush or pick. Verify clear passage.
4

Disconnect the drain hose from the dishwasher drain port and the garbage disposal or sink drain. Inspect for kinks, clogs, or obstructions. Flush with water.
5

Verify the drain valve is operating correctly. Using a multimeter, check for continuity when the valve is supposed to be open.
6

Inspect the drain pump for obstructions. Remove any visible debris.
7

Reconnect all components and restore power. Run a test cycle to verify proper drainage.

Safety Warning:

Always disconnect power to the dishwasher at the breaker panel before performing any repairs. Use proper lockout/tagout (LOTO) procedures to prevent accidental energization. High voltage is present in the control panel; exercise caution.

Prevention:

Periodically flush the drain hose with hot water. Clean the air gap regularly (if installed). Avoid overloading the dishwasher with food debris.

Expert Tip:

Run a vinegar rinse cycle monthly to help prevent mineral buildup and keep the drain system clear. Pour 1 cup of white vinegar into the dishwasher and run a normal cycle without detergent.

Frequently Asked Questions

•What is the ideal height for a high loop in a dishwasher drain line?

The high loop should be as high as possible under the sink counter, ideally close to the underside of the countertop, and securely fastened.

•How do I test the drain valve on my Roper dishwasher?

Disconnect power to the dishwasher. Locate the drain valve solenoid. Using a multimeter, check for continuity across the solenoid terminals when the valve is supposed to be open. If there is no continuity, the solenoid is likely faulty.

•What type of drain cleaner is safe to use in a Roper dishwasher to clear a clog?

Avoid using harsh chemical drain cleaners. Try using a mixture of baking soda and vinegar followed by a hot water flush. If the clog persists, it is best to manually remove the drain hose and clear the obstruction physically.

Roper Dishwasher High Loop vs Air Gap Installation: US Code Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the ideal height for a high loop in a dishwasher drain line?

•How do I test the drain valve on my Roper dishwasher?

•What type of drain cleaner is safe to use in a Roper dishwasher to clear a clog?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: