Viking Refrigerator interior lights off

[bluefitness]

Viking VIRB536

The refrigerator seems to be cooling fine. I have an intermittent problem where the lights turn off and stay off. I turned the main disconnect off and the lights came back on. I don't think it was in Sabath mode, as I didn't see the 3 blue lights on the panel lit. What are your thoughts on this? I'm thinking it is a faulty door switch or possibly the sabath relay. I haven't looked at the wiring diagram yet. It seems like the bottom door switch activates the lights. I'm not sure what the top door switch does. Does anyone know?

 

 

[Hiroshi]

Check the door switch, and there is probably a bi-metal heat limiter for the lights mounted near the bulb(s). If the door is open for a long period, the bi-metal will kill power to the lights and it may not be resetting itself...

[bluefitness]

Thanks for the help

 

There are two switches for this model. The bottom switch seems to control the lights. I removed the switch and checked for continuity. It appears to be in working order.

If I turn power off to the refrigerator, the lights will work after I turn the power on. They will work for a while, sometimes intermittently, and then go back off. Do you have any suggestions?

[bluefitness]

 

I just looked through the wiring diagram. It could be the power control board keeping the lights off. There is a relay in the board. I'm assuming it is for sabath mode. The board is over 200 dollars. Hopefully, I can get it to replicate the problem again, and I'll check for neutral coming out of the cabinet light terminal at the board. 

[Hiroshi]

sometimes the bulb socket will start making poor contact, but if you have 2 or more bulbs acting up, look to a common component