I had a problem for years with my detector going off. I had everything checked out multiple times and couldn't find the cause. Finally, I replaced the detector and never had the problem again. It was a faulty detector. Frankly, I liked the old detectors that measured the LP gas pressure. If the needle moved after turning off the LP, it meant there was a leak somewhere. It doesn't provide the warning of the alarm but, considering the failure rate, along with the obvious risk of having a malfunctioning detector, they should have kept both the leak detector and the LP detector.
