A/C Recharge
A/C Recharge
Section titled “A/C Recharge”Before Recharging
Section titled “Before Recharging”- A/C systems do NOT consume refrigerant — if it’s low, there’s a leak
- Find and fix the leak before recharging
- Common leak points: compressor shaft seal, O-rings at connections, condenser
DIY Recharge (Top-Off)
Section titled “DIY Recharge (Top-Off)”- Connect manifold gauge set to high and low side ports
- Start engine, turn A/C to max cold, max fan
- Check pressures against specifications
- Add R134a refrigerant as needed
- Do NOT overcharge — damages the compressor
Pressure Specifications
Section titled “Pressure Specifications”- Low side: 25-45 PSI (running, A/C on)
- High side: 150-250 PSI (varies with ambient temperature)
Professional Service Recommended
Section titled “Professional Service Recommended”A proper A/C service includes:
- Recover existing refrigerant
- Vacuum test for leaks
- Evacuate system (30+ minutes vacuum)
- Recharge with exact amount by weight
- Add correct amount of PAG oil
- UV dye for future leak detection