I'm wondering if anyone else with a QuadraFire Expedition II or VC Montpelier II insert has experienced an issue with the automatic fan. I had the insert installed in the fall and during the first use of it in Nov. for a 2 day trial period the fan came on and shut off flawlessly. Then in Dec. It also worked flawlessly during a 2-day burn...then quit, and never came on again the following 2 days. The install tech came out and replaced the snap disc, and a few days later the exact same scenario: It functioned perfectly for 2 days and then quit. I understand that the disc is rated (there are 3 different ones to my understanding) at 125 d.F. When this insert is burning nicely the ambient in-stove temp is at least 4 times that so why is this thing not working?? Other than this fan issue, the QF insert is fantastic and heats the half of the house with it to 79-80. To be honest, the only time I really want to rely on the auto fan is overnight so that it shuts off and isn't blowing cool(er) air come 4 am or so. But that said, technology is such that this shouldn't be happening. Any thoughts?