enblethen wrote:
Even if they come with new boards they still need to be set up.
I didn't see whether this is same issue as you had with original AC units that were replaced.
Yes and no on set up. Zone 1 is a default and will be the front unit. Zone 2 MUST be set and will be bedroom. If Zones NOT set up, then the system will not function at all. So, his zones are set correct. The ONLY other set up that he would need is to tell it has a furnace. But if not switched to furnace it would have no bearing on his Cool operation. Doug