Product review (5 stars): Works great for Sub Zero 501r
Worked great for my subzero 501r. We ordered this switch because of the poor reviews for the #7004257 non-original switches found on Amazon. This switch arrived and I installed it 5 days ago--it is working great.  Please keep in mind that this is for the light. It is not interchangeable with the fan/compressor door switch (Subzero #7004259, though Subzero #3-06-002-0, aka #306-0020 will also work for the fan).  The light and fan switches work in reverse from from each other.  The light switch is normally closed, and opens/turns off the circuit when pushed (door closed), while the fan switch is normally open, and closes/turns-on the circuit when pushed.  I needed both switches but had to find the fan/compressor switch version elsewhere.  Another alternate for the light switch (Sub Zero #7004257) is apparently #306-0030.