Viking Built-In Refrigerator Display oPn: Temperature Sensor Open

What oPn means

On Viking Professional 7 Series and Designer built-in refrigerators, second generation, and current 5 Series built-ins such as the VCBB5363E, VCSB5423 and VCFB5303, the temperature sensor alarm sounds and the display shows oPn. oPn means the sensor circuit is open. Pressing ALARM OFF silences the alarm, but if the display does not go back to showing the temperature, a technician is needed.

Common causes of oPn

Temperature sensor circuit open
Sensor plug or wire loose
Control input failing

✓ One safe check you can try

1. Press ALARM OFF to silence the tone. 2. Wait a few minutes and see if the temperature returns to the display. 3. Unplug the refrigerator for two minutes and plug it back in. 4. Keep doors closed. 5. If oPn stays, call us.

! Why to stop there

An open sensor circuit cannot be repaired by cleaning
The sensor is behind the liner
The control may be cooling blindly in the meantime

Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.

→Same appliance

Other Refrigerator codes

ShrViking Built-In Refrigerator Display Shr: Sensor Circuit Shorted Upper unit openViking Fully Integrated Column Message "Upper unit open": refrigerator door open Upper unit too coldViking Fully Integrated Column Message "Upper unit too cold": refrigerator running colder than set Upper unit too warmViking Fully Integrated Column Message "Upper unit too warm": refrigerator above its setting LLViking 5 Series Undercounter Refrigerator Code LL: compartment temperature too low P1Viking Undercounter Refrigerator Code P1: thermostat probe failure POWERViking Built-In Refrigerator Light POWER: Flashing to Show a Power Loss Power Failure!!Viking Fully Integrated Column Message "Power Failure!!": extended power interruption

oPnoPn questions

What is the difference between oPn and Shr?

oPn means the sensor circuit is open, Shr means it is shorted. Both are temperature sensor alarms and both need a technician if the temperature does not return.

Will the alarm stop by itself?

You can silence it with ALARM OFF. If the display still shows oPn afterward, the sensor circuit is still open and the alarm will return.

Is the refrigerator still cooling?

Often yes, but the control cannot read the temperature, so check with a thermometer. We give you a written price before work, with a 30-day workmanship warranty.