I have a XTR-695 in the windshield, about RVM height (next to it), and when I get in the car after a day at work, I am not out of the parking lot, and Its falsing K, pegged at 9, beeping like crazy, but I know nothing is around at all. I can continue all the way home, and it does not stop. Could it be that it is suffering from RD Heatstroke? My test was; take it down, put it in the shade, put a sunshade in the windshield, and partially open the windows. That worked, no problems on the trip home. There have been other times when I will stop for 15 to go in a store. Come out, start driving, and in about 5 minutes of it being in the sun, it starts false alarming again. I am pretty sure it is always K, and it pegs at 9.
I have searched it here, and Googled the internet as well, and it seems no one else has this problem. I have never had problems with any other of my RDs being affected by heat, because honestly, it should not be affected It is in its element, to be in an enclosed, mostly hot car in the direct sun in a windshield.
Has any else had this problem?