AC works great - no problems.
When switching over to Heat there is nothing; the circit board on the heater is getting power but nothing is turing on. The Honeywell Tstat is showing "HEAT ON"

Trouble Shooting so far:
Installed new 5 wire from the Tstat to the Heater/AC unit
All the color wires match up from the tsat to heater
Fan does spin if I use my finger to move it (not seized)

Any suggestions would be great! :)

Read the post at the link below then post back to here with more information.

https://www.askmehelpdesk.com/heatin...00-284131.html

Got it working - Bad T-stat...

Same Problem... Changed the T-Stat, still nothing. Circiut board making a loud "Crackling noise".
I have a Ducane Gas Furnace
Model CMPE075U3
Downflow/Horizontial Right

Old T-Stat.. Old mercury kind
Replaced with Honeywell RTH7600 Touchscreen Programmable.

I was able to get cool air from it, now when you switch to either or you hear that noise from the board, like a swoosh crackling sound.

Any ideas?