Amana Fridge Freezer: Ice Buildup Under Drawers... | appliancefaults.com

Technical Background:

The refrigerator's Main Control Unit (MCU) manages the defrost cycle based on temperature sensor readings. A thermistor monitors the freezer temperature, signaling the MCU when to initiate a defrost cycle. Voltage is then sent to the defrost heater to melt frost buildup on the evaporator coils. The defrost thermostat acts as a safety device, preventing the heater from overheating. A blocked drain can cause water to accumulate and freeze on the freezer floor.

Symptoms:

The US homeowner observes ice buildup on the floor of the Amana refrigerator freezer, specifically underneath the drawers.

Possible Causes:

Defective defrost thermostat.
Blocked defrost drain.
Faulty defrost heater.
Door seal leak.
Air leak from improper door closure.

Solution:

1

Unplug the refrigerator or turn off the breaker to the refrigerator circuit.
2

Remove the freezer drawers and any shelving to access the freezer floor.
3

Locate the defrost drain. It's usually at the back of the freezer compartment. Use a hair dryer or turkey baster with hot water to clear any ice blockage. A flexible wire can also be carefully used.
4

Check the defrost heater for continuity using a multimeter. Resistance should be present. If it reads open, the heater is faulty and needs replacement.
5

Inspect the defrost thermostat (bi-metal) for continuity. It should show continuity when cold (below 40°F). If it's open when cold, replace it.
6

Examine the door seal for rips, tears, or gaps. Replace the door seal if damaged.
7

Once all components are checked and functioning correctly, reassemble the freezer. Plug in the refrigerator or turn on the breaker.

Safety Warning:

Always disconnect power before performing any repairs. Lock Out/Tag Out (LOTO) procedures should be followed. Refrigerator circuits operate at 120V AC, which can cause serious injury or death.

Prevention:

Clean the refrigerator coils every 6 months. Regularly check the door seals for proper sealing. Avoid overfilling the freezer to ensure proper airflow.

Expert Tip:

Many Amana refrigerators have a service mode. To enter service mode, press and hold the freezer temperature DOWN button and the refrigerator temperature UP button simultaneously for 5 seconds. Use the temperature buttons to navigate the diagnostic tests.

Frequently Asked Questions

•How do I locate the defrost drain in my Amana refrigerator freezer?

The defrost drain is usually located at the back of the freezer compartment, often behind a panel. Consult your refrigerator's service manual for the exact location.

•What type of multimeter settings should I use to test the defrost heater and defrost thermostat?

For the defrost heater, set your multimeter to the Ohms (Ω) setting. For the defrost thermostat, set your multimeter to the continuity setting. Ensure the thermostat is cold when testing.

•How do I replace the door seal on my Amana refrigerator freezer?

Typically, door seals are held in place by retaining screws or push-in clips. Remove the old seal, clean the area, and install the new seal, ensuring it's properly seated. Refer to the refrigerator's service manual for specific instructions.

Amana Fridge Freezer: Ice Buildup Under Drawers Troubleshooting

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I locate the defrost drain in my Amana refrigerator freezer?

•What type of multimeter settings should I use to test the defrost heater and defrost thermostat?

•How do I replace the door seal on my Amana refrigerator freezer?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: