On home unit the ac and heater co on at same time?
No, a home's AC and heater should not turn on at the same time. If this is happening, there's a problem with the system's controls or wiring. It could be a malfunctioning thermostat, a short circuit, or a more serious issue. You should call an HVAC technician to diagnose and fix the problem. Running both simultaneously is inefficient and potentially damaging to the equipment.