OK. If you have heat to the hoses (and therefore the core), then I suspect that the actuator (motor) for the temperature control is not working.
Here is the schematic and the "logical diagram" for where this actuator is.
The first thing I would do is check the HVAC fuse (with a test light of multimeter) and make sure it has power on both sides. If that is OK, I would look at and feel the actuator and check to see if it is moving when the temperature control is moved (with the key turned on). If not, then I would check for voltages at the connector to the actuator.
This is where the documentation gets strange, I don't remember what is correct on this particular model car. The service manual shows the actuator both under the hood and in the passenger compartment. I suspect it is in the passenger compartment, based on the procedure to replace it. So I will send you the procedure and you can let me know if this is not right.
Temperature Actuator Replacement LH
- Remove the right instrument panel insulator.
- Remove the instrument panel compartment (glove box).
- Disconnect the electrical connector at the temperature valve electric actuator.
- Remove the bolts that secure the temperature valve electric actuator to the HVAC module.
- Remove the actuator from the vehicle.
- Install the he temperature valve electric actuator.
- Position the temperature valve electric actuator, then align the slots in the electric actuator driver to the flats on the temperature valve shaft.
Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
- Install the bolts. Tighten
Tighten the temperature actuator bolts to 1.5 N·m (13 lb in).
- Connect the electrical connector at the temperature valve electric actuator.
- Install the instrument panel compartment.
- Install the right side instrument panel insulator.
Here is another diagram that shows the location of the actuator inside the passenger compartment.
Here is the other diagram that shows the actuator under the hood.
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Since you have the car with you, you should be able to tell pretty quickly which location is correct.
Please let me know what you find.
Take Care, Greg A.