Mikepier wrote:
The blower is suppose to come on at the same time with the compressor.
There is nothing wrong with that.
It could be that the furnace schematic was showing you the 30 second
delay for the heat. During heat mode, when the burners ignite, the
blower does not come on for 30-45 seconds until the heat exchanger is
at the proper temperature. Perhaps your old T-stat was wired wrong and
now the new T-stat is wired correctly.


The furnaces I've seen have all had the blower come on right away,
however with trying to make everything more energy efficient, I
wouldn't be surprised to see newer ones where the blower is delayed 30
secs. It will take that long for the coils to get cool, so saving 30
secs of run time helps.

It's possible some parameter is set wrong in the thermostat. I'd
review all the programming settings in the thermostat. That's a great
and versatile thermostat, but it does have a zillion settings and
parameters. Next, I'd try doing a master reset on the thermostat,
then reprogramming. If that doesn't work, I'd call HW support.