Hi! I have a Brower THI30 incubator. I bought it last year and used it to hatch mallard ducks. I had a 90% hatch rate! I just got it out this morning to start setting it up for this year's batch of hatching eggs, but my light bulb will not work. When I plug in the incubator to the wall outlet, I can hear the fan running so I know the incubator is turned on. I tested the bulb out in a Christmas candlestick and it worked just fine, but when screwed into the incubator it will not turn on. Does anyone have any idea why this may be happening? I cannot seem to find any information out there about it. Thanks in advance!