Viking Refrigerator Error Code 4 Flashes: Water Filter... | appliancefaults.com

Technical Background:

The MCU monitors the water filter usage based on time or volume. When a predetermined threshold is reached, it triggers the error code. The voltage path includes the filter sensor, reset switch, and MCU input. A low voltage or open circuit at the sensor input can also falsely trigger the error code.

Symptoms:

The homeowner observes a blinking light on the refrigerator display, specifically four flashes, indicating a need to reset the water filter reminder. The water dispenser might also be slow or not working.

Possible Causes:

Filter not properly installed.
Filter housing damaged.
Reset button not properly activated.
Faulty filter sensor.
MCU (Main Control Unit) malfunction related to filter circuit.

Solution:

1

Disconnect power to the refrigerator at the breaker panel.
2

Remove and reinstall the water filter, ensuring it clicks into place. Check for damage to the filter housing.
3

Locate the water filter reset button (refer to your Viking refrigerator's user manual). Press and hold the reset button for 5-10 seconds.
4

Reconnect power to the refrigerator at the breaker panel.
5

Observe if the error code clears. If not, check the filter sensor wires and connections with a multimeter (should read approx. 5V DC with the filter installed and reset).
6

If the sensor wiring and voltage are good, the MCU might be faulty and require replacement.
7

Verify proper water flow through the dispenser after the reset.

Safety Warning:

Always disconnect power to the appliance at the breaker panel before performing any repairs. High voltage is present in the appliance. Follow proper Lock-Out/Tag-Out (LOTO) procedures.

Prevention:

Replace the water filter every 6 months or as recommended by Viking. Use only genuine Viking water filters to ensure proper fit and function. Regularly check the water dispenser flow rate.

Expert Tip:

Some Viking models have a service mode that allows you to manually reset the filter timer, bypassing the reset button. Consult the service manual for the specific key sequence for your model.

Frequently Asked Questions

•Where is the water filter reset button located on my Viking refrigerator model?

The location varies depending on the specific model. Refer to your owner's manual or search online using your model number. It is typically located on the control panel or near the filter housing.

•How do I test the water filter sensor with a multimeter?

Disconnect the power to the refrigerator. Locate the sensor connector. With the filter installed and the reset button pressed, measure the DC voltage between the sensor wires. It should typically read around 5V DC. An open circuit indicates a faulty sensor or wiring.

•What if replacing the water filter and resetting it doesn't clear the error code?

If the code persists after replacing the filter and performing the reset procedure, the MCU may be faulty and require replacement. This is a more complex repair that should be performed by a qualified appliance technician. There may also be a wiring issue between the sensor and the MCU.

Viking Refrigerator Error Code 4 Flashes: Water Filter Reset Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•Where is the water filter reset button located on my Viking refrigerator model?

•How do I test the water filter sensor with a multimeter?

•What if replacing the water filter and resetting it doesn't clear the error code?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: