Hi. New to FC altho i have been reading up for a while now and love it! bought my mighty 2 weeks ago and am delighted!! I am however having the problem with unit not vibrating at set temps when batt is 3 bars or less. I contacted S&B and they have told me to send it in for service, i want to know if anyone else has had this and if S&B replace the unit or just fix the problem?? I really dont feel like being without my amazing mighty for up to 2 weeks and i feel i can kind of live with the problem if it means no seperation from it. I would obviously rather a perfectly working unit for the price of it tho. Any info would be of great help. Thanks