Replaced a carrier with a carrier heat pump model 25HPA...& FV4CNB... air handler/fan coil & Carrier Edge Programmable Thermidistat 3 years ago. System has worked great. Problem is I retained Dynamic Air Filters that were installed with original system & worked fine too until new system was installed. I recently discovered that filter system was not on/functioning during various levels when heat pump is supplying heat during cold weather. Air filter mounts in return air grill/register & receives 24VAC from air handler & is supposed to operate when blower is ON whether in auto or manual setting. Filter has a monitor lamp where power cable plugs into filter. Filter operates when heat pump is in Heat On & Aux Heat On modes but not in Heat On2 mode. My sense is the Edge thermidistat is not properly configured/programmed in one of the 44 various installation configurations. Dealer will not correct this under warranty & eyes glaze over when I explain problem to them. I can reconfigure thermidistat myself if I know for certain which option is the problem. Any suggestions?