Viking Built-In Refrigerator Code 2 Flashes: No Signal From the Main Board

What 2 Flashes means

On Viking built-in refrigerators with the variable-speed compressor, such as the VCSB5423 or VCBB5363E, two flashes every five seconds on the inverter LED, with the compressor off, mean the inverter gets no signal from the main control board. You will not see this on the display. What you notice is a refrigerator that stops cooling while the lights and fans may still work.

Common causes of 2 Flashes

Frequency cable between the board and inverter loose or damaged
Main control board not sending the compressor signal
Inverter that needs replacing after the cable and board check out

✓ One safe check you can try

1. Confirm the refrigerator has power and the controls are on. 2. Unplug it for two minutes, then plug it in and wait 12 minutes. 3. Move cold food to a cooler if the temperature climbs. 4. Keep the doors shut. 5. If the compressor is still silent, call us.

! Why to stop there

The frequency cable and inverter are behind a service panel
The order of checks matters: cable, board, then inverter
Food can warm within hours while you wait

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.

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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 HIGH TEMPViking Built-In Refrigerator Message HIGH TEMP: Cabinet Warm for Two Hours LAViking Undercounter Refrigerator Code LA: low-temperature alarm after 30 minutes LLViking 5 Series Undercounter Refrigerator Code LL: compartment temperature too low oPnViking Built-In Refrigerator Display oPn: Temperature Sensor Open

2 Flashes2 Flashes questions

What is the frequency cable?

It is the wire that carries the start command from the main control board to the inverter. If it is loose or broken, the compressor never hears the signal to run, even though the refrigerator has power.

Will unplugging the refrigerator fix this?

It can clear a one-time glitch, so a two-minute unplug and a 12-minute wait are worth trying. If the two flashes return, the cable, the board or the inverter must be tested by a technician.

How long will food keep?

It depends on how full the unit is and how often you open it. Keep the doors shut, move perishables into a cooler if the cabinet feels warm, and call us promptly so we can come quickly.