Not quite sure what you're asking here - HVAC stands for "Heating, Ventilation and Air Conditioning", and includes such things as the air conditioning compressor, condenser and evaporator coils, associated tubing and other components, the heater core and its hoses, the various ducts, airflow controlling valves, and the control panel on the dashboard. If your vehicle has a premium system with automatic temperature control there will probably be an electronic control box that automatically regulates all of the above to maintain your selected temperature.
These components vary in location from the front of the vehicle to the passenger compartment, under the hood, behind the instrument panel, and sometimes even in the trunk or rear of the vehicle (if you have a multi-zone system that provides heating or cooling separately to the rear).
Inline in one heater hose underhood near the HVAC box (right hand side underhood.)
form_title= HVAC Systems form_header= Replace or repair your HVAC system. How old is your existing HVAC system?*= _ [50] Do you want to replace your HVAC system?*= () Yes () No Do you want the system to be Energy Star compliant?*= () Yes () No
A reputable HVAC service Co. will locate and repair the leak and recharge your system.
Check HeaterTreater.net for information on the Explorer HVAC system.
The purpose is what it was without a HVAC system ... to make heat !
Perhaps a stuck door in the HVAC system or a blockage in the ducts.
It's behind the glovebox inside the HVAC case.
Go to a junk yard and buy a used one.
evacuation removes and non condensables from your hvac system such as air or moisture
It is in the center of the HVAC housing under the dash. Dash and HVAC need removed to access.It is in the center of the HVAC housing under the dash. Dash and HVAC need removed to access.
HVAC in a car is the Heating, Ventilation and Air Conditioning system.
I'm not sure if Mercury followed Ford with the introduction of the new HVAC system in 2003. That is probably the case and the system and problems will be the same as the Ford Explorer. Pictures to identify which system you have and diagnostic processes are available on heatertreater.net.