Question about Sub-Zero 650 / O Bottom Freezer Refrigerator

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Light is out in 650

The light was going on and off- both the bulbs and the backlight for the display. now they are both off and i cant figure out how to reset. i can get new bulbs but that will not fix the backlight problem on the display. any tips

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  • Leslie Dressler Aug 25, 2013

    I'm having the same problem. The switch checks out OK but I'm only getting 2 to 3 V across the terminals. Defininitely not enough voltage to light up the bulbs and display. Anybody have any ideas?


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  • 7 Answers

Check continuity on door light switch with ohmmeter (turn off power and disconnect wire harness at switch first) Probably a second switch that turns compressor off if door open. my 690 sub zero had a bad light switch that was stuck on initially but now only works if I wiggle it. Can a person buy parts online? Some new subzeros have a fuse panel behind the compressor grill??
Just bought a used 690 and found a nice wiring diagram for a model 630 or something in a nice ziplock pouch behind the compressor grill. Look there for clues.

Posted on Jun 01, 2008

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1 Answer

Sub Zero 650/s control board light is out and inside lights out but fridge works.


On this model, the lights work with the light switch, if it stick all the light in that section will not work. Parts number 7014646 (about 20 bucks) If only the control display is not illuminated then the bulb behind the control is the only problem.

I hope this helps.

Oct 02, 2013 | Sub-Zero 650 / O Bottom Freezer...

1 Answer

Sub zero lights dont work

Try wiggling light switch side to side kinda hard, (the light switch is the one on the left) it should come on, showing you its a bad lt. switch.if that fails install 1 new 40watt,(long) appliance bulb. but it is going to be the switch or the bulb considering there wasn't any wiring work done on unit. part# for the light switch is 3060140 make sure the back of the switch is white not black (black is a fan switch) Good Luck !!!

Feb 13, 2012 | Sub-Zero 650 / O Bottom Freezer...

1 Answer

Light and display in top section are off. freezer is fine.

1. the zero bulb may be spoiled or due to too much cold it is not working. should take the bulb and ask in the market you may get it then replace the new one.
All The Best!

Dec 23, 2010 | Sub-Zero 650 / O Bottom Freezer...

1 Answer

Sub Zero 650 - Light doesn't go on

It's either a new bulb needed or a new door switch. Try the bulb first as it's cheaper.

Sep 28, 2009 | Sub-Zero 650 / O Bottom Freezer...

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turn the unit off for a few minutes then back on. If you have a real problem that needs to be serviced the service and ice light will star flashing again relativly soon

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My lights are off in the subzero 650.

replace light bulbs or light switch...... is cooling ok?

Feb 24, 2009 | Sub-Zero 650 / O Bottom Freezer...

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first try to tightin the bulb, it has a seal and it's hard to drive it home. otherwise it could be the door switch.

Dec 22, 2008 | Sub-Zero 650 / O Bottom Freezer...

1 Answer

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you can check the bulb's resistance if they still have. they could be both busted. if they have, the problem could come from thre door switch if you have mechanical door switches that controls bulbs. on the LED read outs, you could have a loose connection to the main board because if the board is not functioning well, then you should not have a cooling refrigerator.

please rate me, i hope i was able to solve your problem.

Jul 12, 2008 | Sub-Zero 650 / O Bottom Freezer...

1 Answer

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Check the light switch on the door frame, if that doesn't do the trick change the light bulb. If your refrigerator is not running and cooling and the light is out check the power, plug & circuit breaker in the power center.

Jun 02, 2008 | Sub-Zero 650 / O Bottom Freezer...

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