No air conditioning Heater does not work how do I fix it?

Bad connection at heater box under to hood

What's Wrong With My Car's Heater? - Popular Mechanics

www.popularmechanics.com/cars/.../whats-wrong-with-my-cars-heater-1...

... hot air you need. Here's what to do if your vehicle is struggling to turn up the heat.... In the recently chilly mornings I've noticed my heater isn't putting out hot air. ...Surely it's not saying it won't play the DVD because 1 doesn't match Free. And, yes, it.... The Nurburgring Nordschleife should need no introduction. Nearly 13 ...

How to Fix a Car with No Heat (Easy) - YouTube

? 10:56
https://www.youtube.com/watch?v=-XjXTVJhFLM
Nov 21, 2014 - Uploaded by ChrisFix
Car not blowing hot air? This video will show you how to fix yourcar's heater whether it is your heater ...

Car Heater Not Working - Troubleshooting Repair Tips ...

? 4:05
https://www.youtube.com/watch?v=aCkVjiPZA4o
Oct 1, 2013 - Uploaded by WiseAutoTools
When troubleshooting to try and repair the car heater, check the coolant ... If a cooling system is full and there's still no hot air coming from the vents, .... Hi I have 2001 ford expedition and theheater just blows out cold air and ...

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PT Cruiser AC air conditioning fix how to - YouTube

? 1:28
www.youtube.com/watch?v=r2n3Uuvwyc0
Jul 9, 2014 - Uploaded by invictustang
Here is a short and simple video to fix the AC in a PT Cruiser. The first thing you ... This is the same on a dodge neon .... the pt cruiser). 3- The compressor itself: Since the clutch is not working, can be the coil or something on it.

Dear Sir: See the diagram attached and proceed according with logic system.

Disconnect the battery ground lead.

1. Remove the radio/cassette player and CD player (if fitted
2. Remove the bezel with the heater/air conditioning control panel.
3. Remove bezel with heater/air conditioning control panel .

Remove the heater/air conditioning control panel from the bezel




you will need this tool shown below to remove the factory radio

Cherokee, Grand Cherokee, 1999-2005

Removal & Installation

1. Disconnect and remove the negative battery.
   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.
2. Drain the cooling system into a clean container for reuse.
3. Remove the instrument panel by performing the following procedure:
   1. Turn the steering wheel in the straight-ahead position.
   2. Remove the knee blocker from the instrument panel.
   3. Remove the steering column; do not remove the air bag module, the steering wheel or switches from the steering column.
   4. From under the driver-s side of the instrument panel, disconnect the following items:
      
      Instrument panel wiring harness connector from the 100-way wiring harness connector at the left side of the inner panel. Side window demister hose at the heater/air conditioning housing demister/defroster duct on the driver-s side.
   5. Remove the glove box.
   6. Reaching through the glove box opening, disconnect the following items:
      
      Two halves of the heater/air conditioning system vacuum harness connector. Instrument panel wiring harness connector from the heater/air conditioning system wiring harness connector. Instrument panel wiring harness connector from the passenger-s side air bag module wiring harness connector. Side window demister hose at the heater/air conditioning housing demister/defroster duct (passenger-s side). Two halves of the radio antenna coaxial cable connector. Two instrument panel wiring harness connectors from the passenger air bag ON/OFF switch wiring harness connector. Passenger-s side air bag ON/OFF switch wiring harness from the retainer clip on the plenum bracket that supports the heater/air conditioning housing just inboard of the fuse block module. Two lower passenger-s side air bag module bracket-to-dash panel nuts.
   7. Remove the upper cover from the instrument panel.
   8. Remove the 3 instrument panel-to-door hinge pillar screws.
   9. Remove the 4 upper instrument panel-to-dash nuts.
   10. Using an assistant, remove the instrument panel from the vehicle.
       
4. If equipped with air conditioning, discharge and recover the air conditioning system refrigerant.
5. Disconnect the refrigerant lines from the evaporator. Plug the refrigerant openings to prevent evaporation.
6. Disconnect the heater hoses from the heater core tubes.
7. Disconnect the heater/air conditioning system vacuum supply line connector from the T-fitting near the heater core tubes.
8. In the engine compartment, remove the 5 heater/air conditioning housing-to-chassis nuts. If necessary, loosen the battery hold-downs and reposition the battery for access.
9. Remove the cowl plenum drain tube from the heater/air conditioning housing stud; it-s located behind the cylinder head on the cowl.
10. From the bottom of the heater/air conditioning housing, remove the floor duct.
11. On the passenger side, remove the heater/air conditioning housing-to-plenum bracket screw.
12. Pull the heater/air conditioning housing down far enough to clear the defrost/demist and fresh air ducts, then, rearward far enough to clear the mounting studs and the evaporator drain tube to clear the dash panel holes.
13. Remove the heater/air conditioning housing assembly from the vehicle.
14. Remove the heater/air conditioning housing upper case.
15. Lift the heater core from the lower half of the heater/air conditioning housing.
    

To install:

1. Assemble the heater core into the lower half of the heater/air conditioning housing.
2. Install the heater/air conditioning housing upper case.
3. Install the heater/air conditioning housing assembly to the vehicle.
4. On the passenger-s side, install the heater/air conditioning housing-to-plenum bracket screw.
5. At the bottom of the heater/air conditioning housing, install the floor duct.
6. Install the cowl plenum drain tube to the heater/air conditioning housing stud; it-s located behind the cylinder head on the cowl.
7. In the engine compartment, install the 5 heater/air conditioning housing-to-chassis nuts.
8. Connect the heater/air conditioning system vacuum supply line connector to the T-fitting near the heater core tubes.
9. Connect the heater hoses to the heater core tubes.
10. Connect the refrigerant lines to the evaporator.
11. If equipped with air conditioning, evacuate and charge the air conditioning system refrigerant.
12. Install the instrument panel by performing the following procedure:
    1. Using an assistant, install the instrument panel to the vehicle.
    2. Install the 4 upper instrument panel-to-dash nuts.
    3. Install the 3 instrument panel-to-door hinge pillar screws.
    4. Install the upper cover to the instrument panel.
    5. Reaching through the glove box opening, connect the following items.
       
       Two lower passenger-s side air bag module bracket-to-dash panel nuts. Passenger-s side air bag ON/OFF switch wiring harness to the retainer clip on the plenum bracket that supports the heater/air conditioning housing just inboard of the fuse block module. Two instrument panel wiring harness connectors to the passenger air bag ON/OFF switch wiring harness connector. Two halves of the radio antenna coaxial cable connector. Side window demister hose at the heater/air conditioning housing demister/defroster duct (passenger-s side). Instrument panel wiring harness connector to the passenger-s side air bag module wiring harness connector. Instrument panel wiring harness connector to the heater/air conditioning system wiring harness connector. Two halves of the heater/air conditioning system vacuum harness connector.
    6. Install the glove box.
    7. Under the driver-s side of the instrument panel, connect the following items:
       
       Side window demister hose at the heater/air conditioning housing demister/defroster duct on the driver-s side. Instrument panel wiring harness connector to the 100-way wiring harness connector at the left side of the inner panel.
    8. Install the steering column.
    9. Install the knee blocker to the instrument panel.
    
    
13. Connect and remove the negative battery.
14. Refill the cooling system.
15. Run the engine to normal operating temperatures; then, check the climate control operation and check for leaks.

Hope helps (remember rated this).

This is a job that will take a lot of motivation for even someone that is used to working on this stuff. All the items that need servicing is under the dash. You'll have to disassemble all the duct work to get at this core. There is nothing really technical about it, you just have to remember how it all goes back together. Have your digital camera ready and take pics of each dis-assembly step. You really should invest in a repair manual that spells out the steps too.

The Air-conditioning needs to be re-gassed. Take the car to an Auto Mechanic to get the Air-Conditioning re-gassed. They might also need to check it for leaks to make sure the gas stays in.

Removal & Installation

1. Disconnect the negative battery cable.
   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
   
2. On diesel models, remove the passenger side battery and battery tray.
3. Remove the instrument panel by performing the following procedures:
   1. Remove the air bag control module (ACM) and bracket from the floor panel tunnel.
   2. Remove the trim from both cowl side inner panels.
   3. Remove the steering column-to-instrument panel opening cover.
   4. Remove the 2 hood latch release handle-to-instrument panel lower reinforcement screws and lower the handle to the floor.
   5. Disconnect the driver-s side air bag module wiring harness connector from the lower instrument panel reinforcement.
   6. Place the wheels in the straight-ahead position and lock the steering wheel. Remove the steering column without disassembling it.
   7. From under the driver-s side of the instrument, disconnect or remove the following items:
      
      Parking brake release handle linkage rod from the parking brake mechanism located on the left cowl side inner panel. Instrument panel wiring harness connector from the parking brake switch located on the parking brake mechanism. Three wiring harness connectors (body wiring harness, headlight, dash) from the 3 junction block connector receptacles located closest to the dash panel. Head light/dash-to-instrument panel bulkhead wiring harness connector screw and disconnect the connector. Instrument panel-to-door wiring harness connector located directly below the bulkhead wiring harness connector. Infinity sound system wiring harness connector (if equipped), located at the outboard side of the instrument panel bulkhead connector. Stop light switch electrical connector. Vacuum harness connector located near the left side of the heater/air conditioning housing.
      
   8. Under the passenger-s side of the instrument panel, disconnect the radio antenna coaxial cable connector.
   9. Loosen both sides of the instrument panel cowl side roll-down bracket screws about 1 / 2 inch (13mm).
   10. Remove the 5 upper instrument panel-to-upper dash panel screws; remove the center screw last.
   11. Roll down the instrument panel and install a temporary hook in the center hole on top of the panel. Attach the other end to the center hole in the top of the dash panel. The opening should be approximately 18 inches (46cm).
   12. Disconnect the instrument panel-to-heater/air conditioning housing assembly wiring harness connectors.
   13. Using an assistant, remove the instrument panel from the vehicle.
   
   
4. If equipped with air conditioning, perform the following procedure:
   1. Discharge and recover the air conditioning system refrigerant.
   2. Disconnect the refrigerant lines from the evaporator. Plug the openings to prevent contamination.
   3. Disconnect the refrigerant lines from the accumulator. Plug the openings to prevent contamination.
   4. Remove the accumulator.
   
   
5. Drain the cooling system into a clean container for reuse.
6. Disconnect the heater hoses from the heater core tubes.
7. Remove the PCM from the dash panel and move it aside. Do not disconnect the PCM harness connector.
8. In the engine compartment, remove the heater/air conditioning housing assembly-to-chassis nuts.
9. In the passenger-s compartment, remove the heater/air conditioning housing-to-dash panel nuts.
10. Pull the heater/air conditioning housing assembly rearward far enough to clear the studs and air conditioning drain tube holes.
11. Remove the heater/air conditioning housing assembly from the vehicle.
12. Remove the upper-to-lower heater/air conditioning housing screws and remove the upper housing.
13. Remove the heater core from the lower housing.
    
    
    Fig. View of the heater/air conditioning housing assembly
    
    
    Fig. View of the heater core
    

The vacuum line on the drivers side of the intake manifold just below the throttle body fell off.