Ive had the battery signal flash for a couple days...the other info (temp, settings, etc) were working fine.I figured they were running low and I'll just change the batteries when I come back from a short trip...I turned off the therm before I left for a few days...when I came back, just the battery signal was flashing...I changed batteries and the settings dont return..it comes on for a second, then shuts off. Is there any reason why the battey signal would still be flashing if I have new batteries installed? Thanks for any help!