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

Technical Background:

The dishwasher's Main Control Unit (MCU) activates the drain pump motor using a triac circuit. The MCU expects to see a current draw within a certain range to confirm pump operation. If the drain path is blocked or the pump is faulty, the MCU may trigger an error or extend the drain cycle.

Symptoms:

Homeowners report that their Frigidaire dishwasher is not draining properly, leading to standing water at the end of the wash cycle. Some might observe water backing up into the dishwasher from the sink or garbage disposal.

Possible Causes:

Improper system of drain hose.
Clogged drain hose or garbage disposal connection.
Air gap is blocked or improperly installed.
Dishwasher drain pump malfunction.
Restriction in the house drain line.

Solution:

1

Inspect the Drain Hose: Check for kinks, bends, or obstructions in the drain hose. Remove any debris. Use a 5/16-inch nut driver to loosen the clamp where the hose connects to the dishwasher or garbage disposal.
2

Verify High Loop or Air Gap: Ensure the drain hose is either secured in a high loop position (at least 20 inches above the floor) or connected to a properly installed air gap. If using an air gap, check for blockages.
3

Check Garbage Disposal Connection: If the dishwasher drain hose connects to a garbage disposal, make sure the knockout plug has been removed inside the disposal. This is a common cause of drain issues.
4

Test the Drain Pump: After confirming proper drain hose system, initiate a drain cycle. Listen for the drain pump operating. If no sound is heard, check the pump's power supply using a multimeter set to 120V AC. If power is present, the pump may be faulty.
5

Clear Drain Line: If the dishwasher is draining slowly, the house drain line may be partially blocked. Use a drain snake to clear any obstructions.
6

Check for Kinked Hose Behind Dishwasher: Use a flashlight to check behind the dishwasher and verify the drain hose isn't crushed or severely kinked.
7

Sanitize Dishwasher: Use a dishwasher cleaner according to the product instructions to clean food build-up and sanitize the internal components.

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 re-energizing of the circuit. Be aware of 120V AC circuits when testing electrical components.

Prevention:

Regularly run the dishwasher with a dishwasher cleaner to prevent build-up. Check the drain hose and air gap (if installed) for blockages every 6 months. Ensure the garbage disposal is clear if the dishwasher drains into it.

Expert Tip:

Many Frigidaire dishwashers have a service mode that can be accessed by pressing a specific sequence of buttons (usually Start/Cancel). Entering service mode allows you to run diagnostic tests, including a drain pump test, without starting a full cycle. Consult the service manual for your specific model for the exact button sequence.

Frequently Asked Questions

•How do I access the drain pump on my Frigidaire dishwasher?

On most Frigidaire dishwashers, you'll need to remove the lower access panel and kickplate. The drain pump is typically located at the bottom of the dishwasher tub, often secured with screws or clips. Disconnect the power before attempting to access the drain pump.

•What size is the drain hose, and where can I purchase a replacement?

The standard dishwasher drain hose size is 5/8 inch inside diameter. You can purchase a replacement hose at most appliance parts stores or online retailers. Measure the length of the existing hose to ensure you get the correct size.

•My dishwasher has an air gap, and it's gurgling. What does that mean?

Gurgling in the air gap usually indicates a partial blockage in the drain hose or the drain line itself. Remove the air gap cover and check for debris. Also, ensure the knockout plug has been removed from the garbage disposal (if connected).

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

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I access the drain pump on my Frigidaire dishwasher?

•What size is the drain hose, and where can I purchase a replacement?

•My dishwasher has an air gap, and it's gurgling. What does that mean?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: