Completed one system home inspection on 13 year old carrier heat pump/ air handler. Heat is running in 2nd stage only (heat strips) and is pulling a 69/99 delta T. Heating 1st stage isn't running as well as the A/c. After further inspection the heat pump has 0/0 R2w refrigerant left in the system. Couldn't do whole inspection due to system not running. Owner was advised that replacement was best option.