Low humming sound, if only I could get my........ oh never mind .
That tells us it has power, I bet it's the thermostat .
Don't leave us hangin, please let us know what the problem is / was.
Yes! It was the T Stat! The furnace was OK. The switches and the transformer were all right. The wiring was done correctly. The IAQ was not communicating to the T Stat upstairs. He went ahead and replaced both units just to be sure. He said it's rare for one of those Honeywell's to go bad but sometimes it happens. I thanked him and said 'glad it wasn't the York'! He was too and was off, headed to another call.