Mine used to do it on a regular basis upsetting neighbours also if I left dogs in with back with the flap up had to remember to turn it off. So I took the sensor cover off [just clips out] and just pulled the plug out of the little black sensor unit, job done.JPC said:Mine did the same thing Sunday night -- around 4 times.... Have had to turn it off. Unfortunately my model requires me to remember to switch it off each and every time. Wondered whether cooler temps or high humidity were causing it. Wish there were an obvious fuse to take out....