Yes we do have a C wire connected. Should I connect it to B?Yes, there
is a blinking red light. Thank you for your help. We are going to
replace the sensor.
I am having the same problem. The heat was working fine until our energy
company did a rolling power off over the Holiday weekend. Now my gas
furnace blows cold air. We have had 2 different HAVAC companies come out
and they could not resolve the prob...