2. Unscrew the two bolts securing the flanges of the outlet and inlet pipelines to the thermostatic valve.
3. Move the pipeline flanges away from the thermostatic valve.
4. Remove the two screws securing the thermostatic valve to the evaporator flange.
5. Remove the valve from the evaporator flange (for clarity, the work is shown on a removed evaporator).
Warning.
- If particles of solid sediment are found in the valve orifice (usually in the form of small balls), this means that the receiver filter element filled with desiccant granules has been destroyed (silica gel). Replacing only the thermostatic valve in this case will not give a positive result. It will be necessary to replace the receiver with flushing the system. This rather labor-intensive procedure can only be performed in a specialized service center using special technological equipment.
6. Install new O-rings on the evaporator pipe flange and lubricate them with compressor oil.
7. Install the thermostatic valve in the reverse order of removal. Do not apply excessive force when tightening the valve mounting studs.
8. Fill the air conditioning system with refrigerant at a specialized center for servicing automotive air conditioners.