I have had this for a few years now and it works great. The last few nights it has taken a while to transmit codes.It comes on immediately, the buttons respond without freezing but it does not send a signal (I have an IR 543 that lights when a signal is sent).After a couple of minutes it works normally. The room it is in is normally around 50-55 degrees, it hasn't affected it other winters. The Ac sdapter is plugged in all the time. I have tried the back reset and that also makes no difference, any ideas?