Philips dehumidifier shows E4 and shuts down; may be accompanied by compressor not starting or stopping quickly.
Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
Possible Causes
How to Fix / Troubleshooting
Safety: Unplug the unit. Do not attempt to open the sealed refrigeration system yourself; refrigerant work requires certified service.
- Check airflow: Remove and clean the air filter with mild soap and water. Ensure the intake and exhaust grilles are not blocked and the unit is at least several centimeters away from walls or curtains.
- Inspect coils: With covers removed, gently vacuum dust from the condenser (warm) and evaporator (cold) coils. Do not bend fins.
- Room conditions: Ensure the unit is used within the specified temperature range in the Philips manual. Very low room temperatures can cause coil freeze and protection errors.
- Thermal protector: Some models have a thermal cut-out on the compressor. Check that its wiring is intact and connectors are tight.
If E4 recurs after cleaning and ensuring proper ventilation, the unit may have a refrigerant or compressor issue. Do not bypass safety devices; contact an authorized Philips service center.