2012Coleman wrote:
COSTAR makes two models of detectors - the 9RV and 12RV-DB. the 12RV-DB is hard wired. I think the 9RV is the most current model. This is the one I have as it was a direct replacement for the prevvious model that came with my TT. It worked with the existing mounting plate, so I didn't have to drill new holes.
HERE is their website - has links to manuals and customer support contact info. Yours might be under warranty.
Did you read the fine print on the back of the detector and install a fresh battery? It usually beeps a couple times when you install a new battery.
I had already checked. They no longer sell the battery model.