Display shows condensate / drain error, unit locks out during operation

How to Fix / Troubleshooting

Safety first: Turn off power before removing the condensate trap.

Step-by-step checks:

Locate condensate trap: Usually at the bottom of the unit, connected to a plastic drain pipe.
Inspect external pipe: Check outside where the condensate pipe discharges. Clear any ice or obstructions. If freezing is common, the pipe may need insulation or rerouting.
Clean the trap: Place a container under the trap, remove it carefully, and flush with clean water to remove sludge. Refit securely, ensuring seals are in place.

When to call a professional: If the error persists, the internal condensate channels or sensors may require professional cleaning.