WHY an economizer beside ducting in air-condition part?

I had this problem before in a different car and found out the duct work to the vent had come loose. The duct work could also have holes in it or blocked. To check this out you have to go into the dash.

These units are not economically viable to try such repairs out of warranty.

I would be sure the filters and ducts are not blocked.

If you recently had a problem with your cooktop lights, that can affect the fan, too, but that can usually be economically repaired.

Water is dripping on your ac from a duct? Or is the unit it self leaking Are you sure you don't need a Professional Air Duct Inspection?
If you are in the market for an Air Duct cleaning check out Air Duct Cleaning Dallas Tx.

you will have to inspect the blend doors. These are the ones that control the flow of the air in the AC duct. It is under the dashboard. There might be loose linkages or parts that you may just need fitting or a bad motor for the door.

1. Disconnect the negative (-) battery cable.
2. Drain the engine coolant into a suitable container.

CAUTION When draining engine coolant, keep in mind that cats and dogs are attracted to ethylene glycol antifreeze and could drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantity. Always drain coolant into a sealable container. Coolant should be reused unless it is contaminated or is several years old.

1. Disconnect the heater hoses. Be careful not to damage the core by pulling on the hose to remove. Cut the hoses if they will not come off easily.
2. Remove the instrument panel.
3. Disconnect the resistor assembly.
4. If possible, disconnect and move the duct (non air conditioning) or the evaporator housing (air conditioning) to the right to gain clearance for the heater unit. If equipped with air conditioning, do not disconnect air conditioning system until absolutely necessary. Refer to for discharging, evacuating and recharging the system.
5. Remove the instrument panel stay and heater unit.
6. Disassemble the heater unit by removing the duct, mode control case, core assembly and heater core.

To install:

1. Assemble the heater unit by installing the duct, mode control case, core assembly and heater core.
2. Install the heater unit and instrument panel stay.
3. Connect the duct (non air conditioning) or the evaporator housing (air conditioning) to the heater unit. Evacuate and recharge the air conditioning system if the system was discharged to remove the evaporator assembly.
4. Connect the resistor assembly.
5. Install the instrument panel as outlined in this section.
6. Connect the heater hoses. Be careful not to damage the core by pulling on the hose.
7. Refill the engine coolant into a suitable container.
8. Connect the negative (-) battery cable and check for leaks.

1. Disconnect the negative battery cable from the remote battery post located near the right strut tower.
   CAUTION After disconnecting the negative battery cable, wait 2 minutes for the driver-s/passenger-s air bag system capacitor to discharge before attempting to do any work around the steering column or instrument
   Remove the instrument panel by removing or disconnecting the following:
   
2. NOTE On the LHS or 300M, remove the center bezel prior to the shifter bezel
   Shifter knob Allen screw Both instrument panel end covers Using a trim stick tool, gently pry upward on the shifter bezel; then, disconnect both wiring connectors and a light bulb socket connector; then, remove the socket.
3. Remove the 2 lower instrument panel cover screws (outside end) and disconnect the deck lid release switch wiring connector. Pull the lower instrument panel cover rearward releasing the clips. Remove the cable-to-brake release handle. Pull the cover rearward and remove it.
4. If equipped for 6 passengers, remove the lower floor bin.
5. If equipped for 5 passengers, remove or disconnect the following items:
   
   Center bezel using the trim stick Heater/air conditioning housing assembly control switch and the traction control switch wiring harnesses Bezel from the vehicle Two left side console side cover screws, pull the cover outward and remove from the vehicle Lower glove box door; the 2 screws are located at the right console side cover, pull outward and remove it 2 bracket screws and the 2 inside the console bin; then, remove the console 2 center lower instrument panel nuts 4 steel reinforcement-to-lower instrument panel cover bottom bolts 16-way DLC from the reinforcement left floor duct/silencer pad screw and the pad Steering column shrouds Shift interlock cable at the ignition switch Column wiring The under column duct section Left panel air conditioning outlet duct The 4 brake pedal support bracket-to-column mounting bolts Lower the steering column Heater/air conditioning housing and the Air bag Control Module (ACM) harness connectors then, the 2 ground eyelets from the floor tunnel near the bulkhead Using a trim stick, carefully, pry out on the left and right A-pillar trim moldings and slide them rearward to remove them.
6. Using a trim stick, carefully pry upward on the instrument panel top cover, and remove it.
7. From both sides, remove the scuff plate screw. Using a trim stick, carefully, pry out the scuff plates and remove them.
8. Remove or disconnect the following:
   
   3 right side cowl panel screws and the panel 3 left side cowl panel screws and the panel Remove the right side under dash silencer and pad 2 right side radio antenna and amplifier harness connectors Left side junction block and Body Control Module (BCM) harness connectors 8 instrument panel-to-chassis screws Pull the instrument panel rearward Instrument panel from the vehicle with the help of an assistant ischarge and recover the air conditioning system refrigerant.
9. Drain the cooling system into a clean container for reuse.
10. Place shop cloths in the interior to catch any excess coolant.
11. Remove or disconnect the following:
    WARNING The air conditioning lubricant used in this system absorbs moisture readily. Do not leave any portion of the system open for any long period of time.
    
    
    Air cleaner hose and the air distribution duct Heater hoses-to-dash panel spring type fasteners and the heater hoses from the heater core. Plug the openings to prevent coolant spillage. Refrigerant lines-to-expansion valve nut and separate the refrigerant lines from the expansion valve. Plug the openings to prevent contamination. 3 heater/air conditioning housing assembly-to-chassis nuts from the engine compartment 2 defroster duct screws and the duct Heater/air conditioning housing assembly-to-dash panel nuts and screws 4 rear seat heat duct nuts and the duct Rear seat heat duct elbow push-pin fastener Electrical connector from the heater/air conditioning housing assembly Pull the heater/air conditioning housing assembly rearward and remove it from the vehicle 2 heater core-to-heater/air conditioning housing assembly screws Heater core from the heater/air conditioning housing assembly

contact me and i can tell you how to put it back together

ALL 850 and S-70 models with climate control have these issues and i am an ASE VOLVO MASTER TECH and you must have a lot of experiance to troubleshoot and fix these systems and 20 pages of tests it sounds like one of the damper motors is not working these motors direct air flow to different duct outlets

That air duct is much too new to fail on its own. Sounds like you might have a mouse living in the duct work - blocking the vents. Have you looked at the cabin filter compartment? Strange smells? How does the heat work?

It sounds like a restriction in your ducting. Feel the A/C vents in the hot rooms to see if cold air is blowing out of them. If the ducts are restricted, then it is possible that the air conditioning coils are freezing up from lack of circulation. Inspect the ducts if you can to see if there is any restriction.

Note that even if you feel air coming out of the ducts, it could be ambient as opposed to cold. The best thing is to measure the air temperature coming out of the ducts. It should be around 20 degrees colder than the ambient air at the intake of the A/C.