I have a Carrier heat and air unit that I just purchased a new heater blower for. How do I purge the unit so I can have heat... Thanks we have not had heat since November.

Does this system have a hot water heat exchanger? Is it a gas furnace that doesn't run? We need some more details on the system to even begin to help. I have NEVER had to 'purge' a system after changing a 'blower fan'.

Yes,, more info please