Viking Appliance Burning Plastic Smell: Troubleshooting... | appliancefaults.com

Technical Background:

The Main Control Unit (MCU) regulates the appliance's operation by sending voltage to various components. The MCU monitors sensors and adjusts power accordingly. Overloading or failure of components can lead to excessive current draw and overheating, causing a burning plastic smell. Voltage paths include 120V AC or 240V AC to the heating element or motor, regulated by the MCU through relays or solid-state components.

Symptoms:

US homeowner observes a strong burning plastic smell emanating from the Viking appliance when it is turned on. The smell may be intermittent or constant during operation. No fault codes are being displayed.

Possible Causes:

Overheated wiring or wire harness
Failing electronic control board component
Melted terminal block or connector
Burned-out heating element (ranges)
Motor malfunction causing excessive heat (refrigerators, dishwashers)
Foreign object lodged near a heating element

Solution:

1

Disconnect the appliance from the power source at the breaker panel using appropriate Lock Out/Tag Out (LOTO) procedures.
2

Remove the appliance's access panels using a 1/4-inch nut driver or a 5/16-inch socket.
3

Visually inspect all accessible wiring and components for signs of melting, burning, or discoloration.
4

Use a multimeter to check the continuity of wiring harnesses and individual components, looking for shorts or open circuits. Check voltage to the unit is 120V AC or 240V AC as needed.
5

If a specific component is identified as the source, replace it with a manufacturer-approved replacement part.
6

If the smell persists after replacing the suspected component, further diagnostics of the control board may be required, including checking for burned resistors or capacitors.
7

For ranges, test the heating element with a multimeter. A reading of 19-50 ohms is normal for a typical range element, but this can vary significantly. After repairs, run the appliance through a test cycle and monitor for any recurring smells or issues.

Safety Warning:

Always disconnect the appliance from the power source before attempting any repairs. Use Lock Out/Tag Out (LOTO) procedures to prevent accidental energization. High voltage is present in the appliance, posing a risk of electric shock. If you are not qualified to perform electrical repairs, contact a licensed appliance repair technician.

Prevention:

Regularly inspect and clean the appliance, paying attention to ventilation areas. Avoid overloading the appliance beyond its rated capacity. Ensure proper wiring connections and prevent moisture exposure to electrical components. Schedule annual licensed technician maintenance checks to identify and address potential issues before they escalate.

Expert Tip:

Many Viking appliances have a diagnostic mode. Consult the service manual or the Viking website for the specific key sequence to enter service mode, which may provide additional error codes or testing procedures.

Frequently Asked Questions

•How can I safely test the heating element in my Viking range?

Disconnect the range from power. Use a multimeter set to ohms. Place one probe on each terminal of the element. A reading within the specified range (typically 19-50 ohms, but refer to the service manual) indicates a functional element. An open circuit (infinite resistance) indicates a failed element.

•What is the typical lifespan of a Viking appliance control board?

The lifespan of a control board can vary depending on usage and environmental conditions. Generally, a control board can last 7-10 years, but factors like power surges, moisture, and excessive heat can shorten its lifespan.

•Are there any specific areas in a Viking refrigerator where wiring is prone to overheating?

Yes, check the wiring around the compressor, defrost heater, and door switches. These areas are subject to high temperatures and frequent movement, which can cause wiring insulation to degrade over time.

Viking Appliance Burning Plastic Smell: Troubleshooting Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How can I safely test the heating element in my Viking range?

•What is the typical lifespan of a Viking appliance control board?

•Are there any specific areas in a Viking refrigerator where wiring is prone to overheating?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: