Unit displays E6 and stops; fan may run but compressor does not start.

Critical safety: Unplug the unit. Work around mains and high‑pressure refrigerant only if you are trained. Do not pierce or heat refrigerant lines.

Basic checks a homeowner can do:

• Ventilation: Ensure the rear and sides of the dehumidifier have adequate clearance and that the condenser coil is not blocked by dust. Clean the rear grille and condenser fins with a soft brush or vacuum.
• Ambient temperature: Very high room temperatures can cause overload. Move the unit to a cooler area and try again after 30 minutes.

Technical checks (recommended for technicians):

• Measure compressor winding resistance and check for short to ground.
• Test the start capacitor/PTC relay if fitted on the compressor terminal cover.
• Verify that the main PCB is supplying correct voltage to the compressor when called.

Repair: Replace a faulty compressor start device (capacitor/PTC) or main control PCB as indicated by tests. If the compressor is seized or windings are shorted, the compressor and refrigerant circuit must be replaced and recharged by an F‑gas certified technician.