I have a Sub-Zero 511 fridge in my kitchen, of indeterminate age. The previous owners installed it, and we've lived there since 2006. The lights inside the fridge have stopped working.

Over a period of a few months, the fridge light became intermittent. Sometimes it would be off, but fiddling with the switch would cause it to come on. Then it quit completely.

I took the plastic cover off to find that this fridge has four specialty bulbs. All of them had turned black. I ordered and installed all new replacement bulbs. The fridge still won't light up.

This suggests to me that something may be wrong in the switch assembly. Is this a DIY fix? If anyone has any guidance in disassembling a Sub-Zero light switch, I'd be grateful.