Viking Oven Light Stays On: Troubleshooting Guide -... | appliancefaults.com

Technical Background:

The oven light is typically controlled by a switch that is activated by the oven door or by a relay on the main control unit (MCU). When the door is open or the oven is in operation, the switch or relay closes, completing the circuit and turning on the light. The MCU sends voltage (typically 120V AC) to the light socket.

Symptoms:

The oven light in your Viking oven stays on constantly, even when the oven door is closed and the oven is not in use. This can be annoying and waste energy.

Possible Causes:

Faulty oven light switch.
Stuck oven door switch.
Malfunctioning oven control board (MCU).
Short circuit in the wiring harness to the light.
Burned relay on the control board.

Solution:

1

Disconnect power to the oven at the breaker panel. Verify 0V AC at the oven receptacle using a multimeter.
2

Locate the oven light switch, usually near the oven door frame or on the control panel. Inspect for physical damage or sticking.
3

Use a 1/4-inch nut driver to remove the switch. Disconnect the wires and test the switch for continuity using a multimeter. The switch should show continuity only when pressed.
4

Check the oven door switch (if equipped) for proper operation. It should depress fully when the door is closed.
5

Inspect the wiring harness for any signs of damage, such as frayed wires or burn marks. Use electrical tape to repair any damaged insulation.
6

If the switch and wiring are good, suspect a faulty oven control board (MCU). Visually inspect the board for burned components or swollen capacitors.
7

Replace the control board with a new one. Ensure the replacement part is the correct part number for your oven model.

Safety Warning:

Always disconnect power to the appliance at the breaker panel before performing any repairs. Lock Out/Tag Out (LOTO) procedures should be followed to prevent accidental re-energization. High voltage is present in the oven control circuit; exercise caution.

Prevention:

Avoid slamming the oven door, as this can damage the door switch. Regularly inspect the wiring harness for wear and tear. Clean any spills or food debris from around the oven light switch.

Expert Tip:

Some Viking ovens have a service mode that allows you to test individual components. Consult the service manual for your specific model to access and utilize this feature. Often holding down the bake and broil buttons simultaneously for 5 seconds enters the service mode. Check the control board relay operation in this mode.

Frequently Asked Questions

•How do I find the correct replacement control board for my Viking oven?

Locate the model and serial number of your oven, usually on a label inside the door frame. Use this information to search for the correct replacement part on appliance parts websites or contact a Viking appliance parts distributor.

•How do I test the oven door switch with a multimeter?

Disconnect power to the oven. Disconnect the wires from the door switch. Set your multimeter to the continuity setting. Place the probes on the switch terminals. With the switch un-depressed, the multimeter should show no continuity (open circuit). When the switch is depressed, it should show continuity (closed circuit).

•What if the oven light socket is damaged?

A damaged oven light socket can also cause the light to stay on or flicker. Disconnect power to the oven. Inspect the socket for cracks or corrosion. If damaged, replace the socket with a new one. Ensure the new socket is rated for the correct voltage and wattage of the oven light bulb.

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I find the correct replacement control board for my Viking oven?

•How do I test the oven door switch with a multimeter?

•What if the oven light socket is damaged?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: