Not sure kas. There is a thin, flexible metal baffle that runs along the inside front of the hood. It has 2 electrical connections in it that run from back to front. One is a female 3-prong connector (shown below). The other is a 2-prong male connector. I assume that one powers the halogens and the other powers the fan. I went up there again and disconnected and reconnected both plugs although both were securely in place yesterday. Here is the male one that was loose last time. Both connectors looked Ok but this is not an area of knowledge for me so I was looking for something blackened. Nada. Now the hood has power again. The fan works but only 1 halogen works. It is easily replaced. Would an appliance halogen burning out be enough to trip the power supply to the hood? And if so, could there be a short somewhere? Should add the hood is 10. Viking can come out to look at it but it's expensive so I'd love to know what to ask them to look for. If the hood is working there seems little point in a service all. OTOH, I don't want to overlook something and have a fire or outage IYKWIM

I have made several potatoe bags, and soup bowl holders, and have only had one person say their bag had a few dark marks, along with a small burnt spot, where one of the seams were sewn. Thinking it was just marks on the fabric, as maybe there had been some food source on the outside of the bowl, and she attempted to hand wash it out, then realised that it was definitely the start of a burn situation. She had placed two potatoes in the soup bowl holder and set it for 6 minutes.....no wonder it started to get so hot and she tossed it into the garbage, Some of the holders I originally made, I used 100% cotton, wrapped with polyester,,,,I since hearing her story make all items to use in the microwave with 100% cotton, fabric, batting and thread, I also include a card to indicate no longer than 2 minutes of cooking time per item. Here are instructions to make a potatoe bag. Cut one 9 x 20 inch rectangle each of the outer fabric, lining fabric and batting. 2. Place the outer fabric and lining fabric, right sides together and batting against wrong side of the lining fabric. Press the outer fabric lengthwise in order to have a center line - see #3 3. On your batting - Using a ruler mark a line across and down from the top at 6" - (use this line so your points will match in the middle at the top of the flap and line up evenly across the bag), and then trim at a 45 degree angle from the center fold, to the outside edge on each side. Stitch around all sides, leaving a 3"opening for turning. Trim the excess batting, and clip corners. Turn right side out, poke all corners and point. Stitch opening closed. You can quilt your bag, before you proceed. Or Not. Fold the bottom up to within one inch of your outside points and stitch the sides, to create a bag. Launder before using your new potatoe and vegetable bag.

Could be a bad batch. Another possibility: the "reveal" lamp might also produce more waste heat (especially since the envelope is tinted). If it builds up in the fixture, that might tend to shorten life. The most common reason for premature failure of incandescent lamps is excessive vibration. Any chance that might apply here?

Vibration is a fast killer of incandescent bulbs. Is the one blowing on a more exposed corner? There are coated bulbs for 'rough service' and other bulbs that contain better filament support. The coated bulbs are not designed for vibration, but breakage of the glass. Try a ceiling fan type bulb.