Roper Refrigerator Air Filter Change Light Reset Guide -... | appliancefaults.com

Technical Background:

The refrigerator's Main Control Unit (MCU) monitors the air filter usage time. After a predetermined period, it activates the air filter indicator light. The reset button sends a signal to the MCU to reset the timer. If the button, wiring, or MCU malfunctions, the light may not reset. The MCU operates on low voltage DC, typically 5V or 12V, derived from the main 120V AC power supply.

Symptoms:

The air filter change light on your Roper refrigerator remains illuminated even after replacing the air filter and attempting to reset it using the designated button.

Possible Causes:

Faulty air filter sensor
Software glitch in the refrigerator's MCU
Sticking or damaged reset button
Low voltage to the MCU
Incorrect reset procedure
Damaged wiring harness

Solution:

1

Locate the air filter reset button on the refrigerator control panel.
2

Press and hold the reset button for 3-5 seconds. Listen for a beep or visual confirmation.
3

If the light doesn't reset, turn off the refrigerator by unplugging it from the outlet or switching off the breaker in the breaker panel.
4

Wait 5 minutes and plug the refrigerator back in or turn the breaker back on. Try the reset procedure again.
5

If the light still doesn't reset, inspect the reset button itself. Use a multimeter to check for continuity when the button is pressed (should read close to 0 ohms).
6

If the button tests good, check the voltage at the MCU board with a multimeter. Refer to the service manual for correct voltage (typically 5V DC or 12V DC).
7

As a last resort, try a hard reset by holding the power button and the filter reset button simultaneously for 10 seconds. If that fails, licensed technician service is needed.

Safety Warning:

Disconnect power to the refrigerator before performing any troubleshooting. Lock Out/Tag Out (LOTO) the breaker. High voltage is present in the refrigerator; exercise caution.

Prevention:

Replace the air filter every 6 months as recommended by Roper. Use only genuine Roper air filters. Avoid excessive humidity inside the refrigerator.

Expert Tip:

Some Roper models have a service mode accessible by pressing a specific sequence of buttons (consult the service manual for your specific model). Entering service mode may allow you to manually reset the air filter timer.

Frequently Asked Questions

•Where is the air filter reset button located on my Roper refrigerator model?

The reset button location varies by model. Consult your owner's manual or search online using your refrigerator's model number. It's typically near the temperature controls or on the dispenser panel.

•What voltage should I expect to see at the MCU when testing for low voltage?

Refer to the refrigerator's service manual or wiring diagram for specific voltage values. Typically, you'll find 5V DC and/or 12V DC circuits. A significant drop below these values indicates a problem.

•Could a faulty door switch cause the air filter light to stay on?

While unlikely to be the direct cause, a faulty door switch could interfere with the refrigerator's overall operation and potentially cause the MCU to misread sensor inputs. Verify the door switch is functioning correctly.

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•Where is the air filter reset button located on my Roper refrigerator model?

•What voltage should I expect to see at the MCU when testing for low voltage?

•Could a faulty door switch cause the air filter light to stay on?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: