A/C Refrigerant Pressure Sensor A Circuit Intermittent/Erratic

Common symptoms

What you'll notice

• Check for loose or damaged wiring connections to the A/C refrigerant pressure sensor
• Inspect and replace the A/C refrigerant pressure sensor if it is faulty or damaged
• Verify proper refrigerant levels and pressures and recharge the A/C system if necessary
• Check and repair any leaks in the A/C system that may be causing the erratic sensor readings

Common causes

Most likely first

1. Faulty A/C refrigerant pressure sensor
2. Loose or corroded wiring connections to the A/C refrigerant pressure sensor
3. Low refrigerant level in the A/C system
4. Malfunctioning A/C compressor clutch
5. Faulty A/C refrigerant pressure switch

How to diagnose & fix

Work through it in order

1. A/C system blowing warm air
2. A/C system not cooling properly
3. A/C system working intermittently
4. A/C system not turning on at all
5. A/C system turning on and off randomly