Amana Dishwasher Clean Light Blinking 7 Times:... | appliancefaults.com

Technical Background:

The dishwasher's Main Control Unit (MCU) monitors various components and sensors. The 7-blink error usually indicates an issue in the drain system, float switch, or wiring. The MCU sends 120V AC to the drain pump. It also reads the float switch to prevent overflows. Voltage paths are critical for operation and diagnostics.

Symptoms:

The Amana dishwasher is not starting or is stopping mid-cycle and the 'Clean' light is blinking seven times repeatedly.

Possible Causes:

Float switch stuck in the up position.
Clogged drain pump or drain line.
Faulty door switch.
Issue with the main control board (MCU).
Wiring harness issue between components.

Solution:

1

Disconnect power to the dishwasher at the breaker panel. Lockout/Tagout (LOTO) procedure must be followed.
2

Check the float switch for obstructions. The float should move freely. Clean any debris around the float assembly. It's usually located at the bottom of the tub.
3

Inspect the drain pump for clogs. Remove the lower access panel and disconnect the drain hose. Use a 5/16-inch nut driver to remove the pump housing if needed. Check for debris and clear any obstructions from the pump impeller.
4

Verify the door switch is functioning correctly. Use a multimeter to check for continuity when the door is closed. The switch should show a closed circuit.
5

Check the wiring harness for any damaged or loose connections. Pay close attention to the connections at the control board and the motor. Check for 120V AC to the door switch from the MCU.
6

If the above steps don't resolve the issue, the main control board may be faulty. Replacement may be necessary. Check voltage at the board connections using a multimeter, but only if you are qualified and aware of the safety measures.
7

After repairs, restore power at the breaker panel and monitor the dishwasher through a complete cycle.

Safety Warning:

Disconnect power to the dishwasher at the breaker panel before attempting any repairs. High voltage is present within the dishwasher. Always follow Lockout/Tagout (LOTO) procedures.

Prevention:

Regularly clean the dishwasher filter and check for any food debris. Periodically run a dishwasher cleaning cycle with a dishwasher cleaner. Check the drain hose for kinks or blockages.

Expert Tip:

To enter service mode on some Amana dishwashers, press and hold the 'Hi Temp Wash' and 'Heated Dry' buttons simultaneously for 3 seconds. This may allow you to run diagnostic cycles and clear error codes. This depends on the age of the model.

Frequently Asked Questions

•How do I locate the float switch in my Amana dishwasher?

The float switch is usually located at the bottom of the dishwasher tub, often near the front. It's a small, cylindrical component that moves up and down with the water level.

•What voltage should I expect to see at the drain pump connector when the dishwasher is trying to drain?

You should typically see around 120V AC at the drain pump connector when the dishwasher is attempting to drain. Verify with your multimeter.

•Where is the main control board (MCU) located in an Amana dishwasher?

The main control board is typically located behind the control panel on the front of the dishwasher. You'll usually need to remove the outer door panel to access it.

Amana Dishwasher Clean Light Blinking 7 Times: Troubleshooting Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I locate the float switch in my Amana dishwasher?

•What voltage should I expect to see at the drain pump connector when the dishwasher is trying to drain?

•Where is the main control board (MCU) located in an Amana dishwasher?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: