Low Pressure Switch Replace

BROUGHAM, 1985 ELDORADO, SEVILLE

1. Disconnect battery ground cable and discharge system refrigerant.
2. Partially remove air cleaner.
3. Disconnect electrical connector at low pressure switch.
4. Using suitable tool, remove switch retaining ring.
5. Remove switch from compressor by pulling on terminal housing with suitable pliers.
6. Using suitable tool, remove O-ring seal from switch cavity.
7. Clean dirt from switch cavity and O-ring groove in rear head.
8. Install new O-ring, coated with clean refrigerant oil, into O-ring groove of switch cavity.
9. Lubricate high side pressure switch housing with clean refrigerant oil and carefully insert switch into switch cavity until switch bottoms in cavity.
10. Using suitable tool, install switch retaining ring with high point of curved sides adjacent to switch housing, ensuring that retaining ring is properly seated in switch cavity groove.
11. Pressurize system with refrigerant vapor to 20-30 psi and check for continuity through switch, terminal to switch housing. The switch contacts must open or close on pressure increase or decrease between 20-30 psi.