E-Cig vent troubleshooting

I have one of Jimfin’s Ecig kits (I love that thing) and it worked great for about a month. It still works fine other than the LED tower doesnt stay on during the venting. It blinks right at the start and cuts out. The pack hasnt moved since I installed the kit (it worked great at the time), I use 8 D cell batteries, all the electronics are GBfans, they still function flawlessly, I tried a fresh pair of batteries as well and still the same result.

Anyone have any advice or tips for a remedy?

I’ve been having the same exact issue. Haven’t gotten a chance to troubleshoot it, though. I’ll try to get in to it this week. I’ll let you know what I find.