I have a rth230b t-stat and the battery lights were flashing I went to get the batteries out and the were hard to budge, I used a screwdriver to get out the old batteries and I put in the new now I got no display. Bought a new t-stat and same thing nothing. What do I do now?
Jim

On the rth230b I called my son over and all he did was put batteries in the new unit and now it works fine.
Boy I feel stupid
Jim