I Have a 07 Accord with a SINGLE ZONE HVAC unit and it is going bad. could I use a DUAL ZONE HVAC unit in the car as a single or would there be problems?

 

No, you cannot. The dual zone HVAC system is part of a climate control system with a fully automatic option. The single zone HVAC system is a manual control system. The electrical circuit system's wiring and harness connectors are different and with multiple different components.