Best HVAC system for big house? Models, brends, any suggestions?

If your air fan is running but the outside unit is not functioning, and you notice a constant flashing light inside your house, it could indicate a problem with your HVAC system. Here are some possible causes and troubleshooting steps you can take:
1. Check the circuit breaker: Start by checking the circuit breaker or fuses related to your HVAC system. Ensure that they are not tripped or blown. If they are, reset the breaker or replace the fuse. If the breaker keeps tripping, there may be an electrical issue that requires professional attention.
2. Check the thermostat settings: Verify that your thermostat is set to the desired temperature and mode (cooling). Ensure that the fan is set to "Auto" rather than "On." Sometimes, setting the fan to "On" can result in the fan running continuously but not the outdoor unit.
3. Inspect the outdoor unit: Examine the outdoor unit for any visible signs of damage or obstruction. Ensure that there are no debris, leaves, or other objects blocking the unit. Clear away any obstructions and make sure the unit has proper airflow.
4. Verify the outdoor unit power supply: Confirm that the outdoor unit is receiving power. Check the power switch located near the unit and make sure it is turned on. Also, check if the outdoor unit is properly connected to a power source.
5. Check for error codes or flashing lights: Some HVAC systems have error codes or flashing lights that indicate specific issues. Consult your HVAC system's manual to understand the meaning of the flashing light you're seeing inside your house. It may provide further insights into the problem.
6. Call a professional technician: If the above steps do not resolve the issue, it's advisable to contact a professional HVAC technician. They have the expertise and specialized equipment to diagnose and repair complex HVAC problems. They can identify any underlying issues with your system and recommend the necessary repairs or replacements.
Remember, working with HVAC systems can be potentially dangerous, and it's crucial to prioritize your safety. If you're uncomfortable or unsure about performing any troubleshooting steps, it's best to seek professional assistance.

how to? that it the full steps, out and in,,>????
there is lots of information on this....
not in warranty? huh?
and how could IT be bad so soon?? no way/ ,huh?
why not post the symptoms and not guess. the below HORROR
posted to show 2 days lost work (life)
buy the FSM and read the HVAC chapter. every word
or alldata.com , same deal. look, read and decide,
oops I cant to this.....?


parcial excerpts. to prove case.
quote:
The HVAC housing assembly must be removed from vehicle for service of the heater core.

housing out: 101:
Disable the airbag system before attempting any steering wheel, steering column, or instrument panel component diagnosis or service. Disconnect and isolate the battery negative (ground) cable, then wait two minutes for the airbag system capacitor to discharge before performing further diagnosis or service. This is the only sure way to disable the airbag system. Failure to take the proper precautions could result in an accidental airbag deployment and possible serious or fatal injury.

WARNING

Refer to the applicable Warnings and Cautions for this system before performing the following operation and . Failure to follow these instructions may result in possible serious or fatal injury.

NOTE

The HVAC housing must be removed from the vehicle and disassembled for service of the heater core, A/C evaporator, air intake housing and the mode-air and blend-air doors.

NOTE

LHD model shown in illustrations. RHD model similar.

Heat Shield - Unified Line 08 JC

Heat Shield - Unified Line 08 JC

Disconnect and isolate the negative battery cable.

Recover the refrigerant from the refrigerant system (Refer to Heating and Air Conditioning/Plumbing - Standard Procedure).

Partially drain the engine cooling system (Refer to Cooling - Standard Procedure).

Remove the top nut (2) that secures the heat shield (3) to the stud (1) located on the dash panel.

NOTE

Two slots are provided at the bottom of the heat shield to aid in heat shield removal. Complete removal of the two bottom heat shield retaining nuts is not required.

Reach behind the engine and remove the two bottom nuts the that secure the heat shield to the studs located on the dash panel and remove the heat shield. Rotate and tilt the heat shield as required.
(capture the FREON as required by USA LAWS, Illegal for DIY person to do. so...)
Unified Liquid and Suction Line to Evaporator 08 JS

Unified Liquid and Suction Line to Evaporator 08 JS

Remove the bolt (1) that secures the A/C liquid and suction line assembly (2) to the A/C evaporator (3).

Disconnect the A/C liquid and suction line assembly from the A/C evaporator and remove and discard the dual-plane seals.

Install plugs in, or tape over the opened refrigerant line fittings and the evaporator ports.

Disconnect the heater hoses (4) from the heater core tubes. Install plugs in, or tape over the opened heater core tubes to prevent coolant spillage during housing removal.
HVAC Housing to Dash Panel Nut

HVAC Housing to Dash Panel Nut

NOTE

Make sure to remove the five bolts that secure the HVAC housing to the instrument panel support prior to removing the instrument panel from the vehicle.

Remove the instrument panel (Refer to Body/Instrument Panel/PANEL, Instrument - Removal).

Remove the rear floor ducts (Refer to Heating and Air Conditioning/Distribution/DUCT, Floor Distribution - Removal).

Remove the condensation drain tube (Refer to Heating and Air Conditioning/Plumbing/TUBE, Condensation Drain - Removal).

Remove the nut (1) that secures the passenger side of the HVAC housing (2) to the dash panel (3).

NOTE

Use care to ensure that the interior is covered in case of loss of residual fluids from the heater and evaporator cores.

Pull the HVAC housing rearward and remove the HVAC housing assembly from the passenger compartment.

at the least, and for sure , things will break, as you work.
get lost, or not figure out how to put it ALL BACK

Remove the HVAC housing assembly and place it on a workbench (Refer to Heating and Air Conditioning/Distribution/HOUSING, HVAC - Removal).

Remove the left side front floor duct (Refer to Heating and Air Conditioning/Distribution/DUCT, Floor Distribution - Removal).

NOTE

If the foam seal for the flange is deformed or damaged, it must be replaced.

Remove the foam seal (1) from the flange (2) located on the front of the HVAC housing (7).

Remove the screw (8) that secures the flange to the front of the HVAC housing and remove the flange.

Remove the screws (3) that secure the heater core tube retaining brackets (6) to the side of the air distribution housing (4).

On RHD models, remove the air distribution housing from the HVAC housing (Refer to Heating and Air Conditioning/Distribution/HOUSING, HVAC - Removal)

Carefully pull the heater core (5) out of the driver side of the air distribution housing.
end excerpt.

You cant go wrong with a synthetic oil. A bit more money but worth it.

Sounds like the blend door actuator. It separates the driver and passenger side from getting air on the AZC system. Here are some instructions on replacing it:
The passenger side blend door actuator is used on all models equipped with Automatic Zone Control (AZC). This actuator is located on the front of the HVAC housing to the right of the floor panel transmission tunnel and cannot be removed from the passenger compartment without instrument panel or HVAC housing removal.

NOTE: This procedure is for AZC Systems (Passenger side only).

1. Disconnect and isolate the battery negative cable.
2. Remove the glove box door. See: Body and Frame\Interior Moulding / Trim
3. Remove the lower I/P glove box door surround panel.
4. Remove the dash assembly. See: Body and Frame\Interior Moulding / Trim\Dashboard / Instrument Panel\Service and Repair\Instrument Panel Assembly
5. Remove the HVAC assembly. See: Housing Assembly HVAC\Service and Repair
6. Unplug the wire harness connector from the blend door actuator.
7. Remove the 2 screws that secure the blend door actuator to the HVAC housing.
8. Remove the blend door actuator from the HVAC housing.

INSTALLATION - AZC (Passenger side only)

1. In stall the blend door actuator on the HVAC housing and tighten the two mounting screws to 2.2 Nm (20 in. lbs.).
2. Plug in the wire harness connector to the blend door actuator.
3. In stall the HVAC unit into the vehicle. See: Housing Assembly HVAC\Service and Repair
4. Install the instrument panel assembly into the vehicle. See: Body and Frame\Interior Moulding / Trim\Dashboard / Instrument Panel\Service and Repair\Instrument Panel Assembly
5. Evacuate the HVAC system.
6. Recharge the HVAC system.
7. Connect and the battery negative cable.

Hope it helps! If you need more, just send me an email at familyguy77351 at yah I wil be glad to finish helping you with more detail.

AIR FILTER
DESCRIPTION
A dust and odor air filter is standard equipment on
models equipped with the three zone temperature
control systems. The filter element is the
same size as the front air conditioner evaporator to
ensure ample filtering capacity. A removable door on
the bottom of the front HVAC housing below the
glove box provides easy access to the filter element
for replacement. The filter should be checked and
replaced at least once every 24,000 km (15,000 miles)
and checked if heater-A/C system performance seems
lower than expected.
REMOVAL
(1) Locate the air filter door on the bottom of the
lower HVAC housing just outboard of the passenger
side of the instrument panel center stack.
(2) Slide the air filter door latch toward the rear of
the vehicle until it engages the opened stop on the
door.
(3) Pull the air filter door straight downward to
disengage it from the air filter opening of the lower
HVAC housing.
(4) Use your fingers to reach through the air filter
opening of the lower HVAC housing far enough to
grasp the air filter.
(5) Pull the air filter straight down and out of the
HVAC housing.
INSTALLATION
(1) Note the “Airflow” directional arrow imprinted
on the foam seal around the frame of the air filter.
This arrow should always be oriented towards the
center of the vehicle.
(2) With the air filter “Airflow” arrow properly oriented,
carefully slide the filter fully upward into the
HVAC housing through the air filter opening.
(3) With the latch still positioned against its
opened stop, reinstall the air filter door onto the
lower HVAC housing air filter opening.
(4) Slide the air filter door latch toward the front
of the vehicle until it hits the closed stop on the door.

Good luck

1.disconnect the battery
2.reclaim the ac system and disconnect at firewall
3. drain coolant and remove the heater hoses
4.remove the fastenerfor the heaterbox on the fire wall.
5. remove the remove the instrument panel(dash board)
6.remove hvac housing

you have a fault somewhere my best bet is to take it in for a check up

Break Down And Replace The Blower Motor


REMOVAL

WARNING: ON VEHICLES EQUIPPED WITH AIRBAGS, DISABLE THE AIRBAG SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCONNECT AND ISOLATE THE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MINUTES FOR THE AIRBAG SYSTEM CAPACITOR TO DISCHARGE BEFORE PERFORMING FURTHER DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE AIR-BAG SYSTEM. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN AN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY OR DEATH OR DEATH.

NOTE: The blower motor is located on the passenger side of the vehicle under the instrument panel. The blower motor can be removed from the vehicle without having to remove the HVAC housing.

1. Disconnect and isolate the negative battery cable.
2. Remove the passenger side cowl trim panel.
3. Position the carpet to access the front upper screw that secures the air inlet housing.
4. Remove the recirculation door actuator.
5. Disconnect the blower motor wire lead connector from the blower motor resistor or power module, depending on application.
   1. Remove the one screw (from the top) that secures the lower air inlet housing to the upper air inlet housing.
   2. Remove the four screws (from the bottom) that secure the lower air inlet housing to the upper air inlet housing and remove the lower HVAC housing.
   3. Push the rubber grommet through the opening in the lower air inlet housing.
   4. Route the blower motor wire lead through the opening in the lower air inlet housing and remove the lower air inlet housing from the vehicle.
   5. Position the recirculation-air door as necessary to access and remove the three screws that secure the blower motor to the lower half of the HVAC housing.
   6. Gently flex the recirculation air door downward to gain access to remove the blower motor from the HVAC housing. NOTE: To aid in installation, note the position of the blower motor mounting tabs prior to removal
      1. Remove the blower motor from the HVAC housing by rotating and tilting the blower motor as necessary.
      INSTALLATION
      
      
      1. Gently flex the recirculation-air door downward to gain access to install the blower motor into the HVAC housing.
      2. Position the blower motor to the HVAC housing and tilt and rotate the blower motor as necessary to install it into the HVAC housing.
      3. Align the blower motor mounting tabs to the locations noted during removal and install the three screws that secure the blower motor to the HVAC housing. Tighten the screws to 2 N·m (17 in. lbs.).
      4. Route the blower motor wire lead through the opening in the lower air inlet housing and seat the rubber grommet.
      5. Position the recirculation door pivot shaft into the lower air inlet housing and install the inlet housing.
      6. Install the four screws (from the bottom) that secure the lower air inlet housing to the upper air inlet housing and the lower HVAC housing. Tighten the screws to 2 N·m (17 in. lbs.).
      7. Install the one screw (from the top) that secures the lower air inlet housing to the upper air inlet housing. Tighten the screw to 2 N·m (17 in. lbs.).
      8. Connect the blower motor wire lead connector to the blower motor resistor or power module, depending on application.
      9. Install the recirculation door actuator.
      10. Reposition the carpet.
      11. Install the passenger side cowl trim panel.
      12. Reconnect the negative battery cable.
      13. Perform the heater-A/C control calibration procedure.

REMOVAL

WARNING:

• ON VEHICLES EQUIPPED WITH AIRBAGS, DISABLE THE AIRBAG SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCONNECT AND ISOLATE THE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MINUTES FOR THE AIRBAG SYSTEM CAPACITOR TO DISCHARGE BEFORE PERFORMING FURTHER DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE AIRBAG SYSTEM. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN AN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.
• REVIEW THE WARNINGS AND CAUTIONS IN THE FRONT OF THIS SECTION BEFORE PERFORMING THE FOLLOWING OPERATION. See: Heating and Air Conditioning\Service Precautions

1. Remove the HVAC housing from the vehicle. See: Heating and Air Conditioning\Housing Assembly HVAC\Service and Repair
2. Remove the foam gasket surrounding the core tubes. NOTE: Notice the orientation of the irregularly shaped gasket on the tubes. The gasket must be placed correctly to ensure proper sealing against the body during reinstallation
   1. Remove the screws and retainers that secure the heater core and tubes to the HVAC housing.
   2. Remove the mode door actuator if necessary for clearance to remove the core.
      1. Lift the heater core straight up and out of the HVAC housing.
      2. When replacing individual tubes, loosen and remove the round tube-to-core clamp, and pull tube from core.
      INSTALLATION
      
      WARNING: REVIEW THE WARNINGS AND CAUTIONS IN THE FRONT OF THIS SECTION BEFORE PERFORMING THE FOLLOWING OPERATION. See: Heating and Air Conditioning\Service Precautions
      
      Any kinks or sharp bends in the refrigerant plumbing will reduce the capacity of the entire air conditioning system. Kinks and sharp bends reduce the flow of refrigerant in the system. A good rule for the flexible hose refrigerant lines is to keep the radius of all bends at least ten times the diameter of the hose. In addition, the flexible hose refrigerant lines should be routed so they are at least 80 millimeters (3 inches) from the exhaust manifold.
      
      High pressures are produced in the refrigerant system when the air conditioning compressor is operating. Extreme care must be exercised to make sure that each of the refrigerant system connections is pressure-tight and leak free. It is a good practice to inspect all flexible hose refrigerant lines at least once a year to make sure they are in good condition and properly routed.
      
      
      
      1. When installing individual tubes, insert tube into core ensuring that tube O-ring is seated in core and not pinched. Hold tube in seated position while installing the round tube-to-core clamp. NOTE: The round tube-to-heater-core clamp should be left loose enough to turn the tube in the core. Position the core in the housing, and then tighten the tube-to-heater-core clamp after orienting the tubes to the molded HVAC housing.
      2. Lower the heater core into the HVAC housing.
      3. Install the mode door actuator, if removed from housing for core removal.
      4. Position the retainers over the heater core tubes. Install and tighten the screws that secure the heater core and retainers to the HVAC housing. Tighten the screws to 2.2 Nm (20 in. lbs.) . NOTE: The grounding strap is to be attached to the lower heater core tube retainer.
      5. Reinstall the HVAC housing to the vehicle. See: Heating and Air Conditioning\Housing Assembly HVAC\Service and Repair

1. Position the HVAC housing to the dash panel. Be certain that the evaporator condensate drain tube and the housing mounting studs are inserted into their correct mounting holes.
2. Install the HVAC housing mounting nuts to the studs on the passenger compartment side of the dash panel. Tighten the nuts to 4.5 Nm (40 in. lbs.) .
3. Connect the HVAC housing wire harness connectors.
4. Reinstall the rear floor heat ducts to the center floor heat duct outlets.
5. Install and tighten the nuts onto the HVAC housing mounting studs on the engine compartment side of the dash panel. Tighten the nuts to 7 Nm (60 in. lbs.) .
6. Reinstall the PCM to the passenger side dash panel in the engine compartment. See: Powertrain Management\Computers and Control Systems\Engine Control Module\Service and Repair
7. Reinstall the coolant reserve/overflow bottle to the passenger side inner fender shield. See: Engine, Cooling and Exhaust\Cooling System\Coolant Reservoir
8. If the vehicle is equipped with the manual temperature control system, connect the HVAC system vacuum supply line connector to the tee fitting near the heater core tubes.
9. Unclamp/unplug the heater core hoses and tubes. Connect the heater hoses to the heater core tubes and fill the engine cooling system. See: Engine, Cooling and Exhaust\Cooling System\Service and Repair
10. Unplug or remove the tape from the suction line and the evaporator outlet tube fittings. Connect the suction line to the evaporator outlet tube. Tighten retaining nut to 28 Nm (250 in. lbs.) .
11. Unplug or remove the tape from the liquid line and the evaporator inlet tube fittings. Connect the liquid line to the evaporator inlet tube. Tighten retaining nut to 28 Nm (250 in. lbs.) .
12. Evacuate the refrigerant system. See: Refrigerant\Service and Repair
13. Charge the refrigerant system. See: Refrigerant\Service and Repair
14. Install the instrument panel in the vehicle. Refer to: Body and Frame, Interior Trim, Dashboard/Instrument Panel, Service and Repair, Instrument Panel Service Procedures, Instrument Panel Assembly Replacement, See: Body and Frame\Interior Moulding / Trim\Dashboard / Instrument Panel\Service and Repair\Procedures\Instrument Panel Assembly Replacement
15. Connect the battery negative cable.
16. Start the engine and check for proper operation of the heating and air conditioning systems.