I have Acurite model 1097b. since day one it's was giving me hard time establishing connection between the sensor and the main unit but somehow playing around with channels a/b/c i was always able to establish the connectivity. Now fora week I'm unable to restore the lost connection. The unit is about 2-3 years old and I would like to get a couple more years more:) If anybody could advise of any solution that would be very highly appreciated. THANKS!