The problem may be due to the improper setting of the configuration switch on the controller board you installed in the AC unit. Remove the access panel on the controller box and find a 8-bit micro switch. The switch you need to turn "on" is in position #5. This is the setting that enables the furnace option on your new controller.
If you have any problems, PM me and I will send you more information to assist you in fixing your problem.
Don't forget, once you change that switch setting, you have to reset the CCC thermostat. To do that press and hold mode and zone buttons while you turn the power switch "on" on the CCC.
Tom
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