What It Means
Low Refrigerant Pressure / Low Ambient
Likely Causes
- Ambient air temperature below 50°F (normal cold-weather cutoff)
- Low refrigerant charge from slow leak
- Dirty evaporator coil reducing airflow and refrigerant pressure
Next Checks
- Check ambient temperature — if below 50°F, unit shutdown is normal and will auto-restart when it warms up
- Clean evaporator coil fins with a garden hose (spray from inside outward — never a pressure washer)
- If ambient is 60°F+ and code persists: refrigerant charge issue — call licensed HVAC technician
Verify Before Repair
SplashLens is a field reference, not a repair guarantee. Confirm the visible code, exact model, and current manufacturer procedure before replacing parts, bypassing safeties, or quoting a customer.
SplashLens is independent and is not affiliated with AquaCal or other equipment manufacturers.
Use SplashLens At The Pad
Manual error-code lookup works after the app has loaded once. AI scan features require internet and should be treated as a second set of eyes.