As modern home environment demands continue to rise, dehumidifier-heater combos have become highly efficient devices 

for tackling variable climates thanks to their integrated functionality. However, dual-function integration also implies more 

complex internal structures, placing higher demands on daily operation and maintenance. Scientific and standardized 

maintenance not only ensures stable operation under harsh conditions like high temperature and humidity or low temperature 

and dampness but also significantly extends the device's service life.

I. Key Points for Daily Maintenance

Regular Cleaning and Inspection:

The filter is the primary maintenance focus, recommended for monthly cleaning. Dust accumulation severely impedes airflow, 

reducing dehumidification efficiency or increasing heating load. Keep heat sinks and air outlets clean to prevent dust buildup 

that affects heat exchange efficiency.

Drainage System Maintenance:

Condensate generated during dehumidification must be expelled through the drainage system. Regularly inspect the drain 

pipe for kinks or blockages to ensure unobstructed drainage. When the dehumidification function is unused for extended 

periods, empty the internal water reservoir to prevent microbial growth and odor buildup.

Operating Environment Management:

Maintain sufficient clearance around the unit, with a recommended minimum ventilation distance of 50 cm (20 inches) in front 

and behind. Avoid operation in confined spaces or near heat sources to prevent overheating or poor air circulation.

II. Seasonal Mode Switching Operations

Transition Period Preparation:

When switching from dehumidification to heating mode (or vice versa) during seasonal changes, first operate the unit in ventilation 

mode for 1-2 hours to allow internal components to acclimate to environmental temperature and humidity shifts.

System Switching Procedure:

1.  Completely shut off the unit's power supply and wait at least 3 minutes for the system to fully stop.

2.  Adjust the operating mode settings according to the instruction manual.

3.  When initiating a new function for the first time, run it at the lowest setting for 30 minutes before gradually adjusting to the 

desired level.

Calibration and Testing:

After switching modes, verify the accuracy of the temperature and humidity sensor readings by comparing them with a reliable 

indoor thermometer and hygrometer. If discrepancies are found, calibrate the unit according to the manufacturer's instructions.

III. Common Troubleshooting and Solutions

Heating Inefficiency Diagnosis:

• Check air circulation: Ensure no obstructions at air outlets and normal fan operation

• Evaluate environmental factors: Large rooms or high ceilings may impair warm air distribution

• Verify auxiliary functions: Confirm oscillating airflow is active to enhance circulation

Reduced Dehumidification Capacity Diagnosis:

• First, check ambient temperature—most units naturally dehumidify less efficiently in cold conditions

• Verify correct device settings and appropriate humidity target

• Inspect filter and heat exchanger for cleanliness

• Observe drainage system operation

Handling Equipment Alarms:

When fault codes appear, first consult the user manual for code explanations. Common issues like sensor failures or drainage 

problems may resolve by restarting the unit. Persistent alarms require professional technician assistance.

IV. Preventive Maintenance Measures

Annual Deep Maintenance:

Recommend conducting at least one comprehensive inspection annually, including:

• Checking electrical connection tightness

• Lubricating fan motor bearings

• Deep cleaning the heat exchanger

• Removing dust from circuit boards (requires professional personnel)

Special Protection for Harsh Conditions:

When operating heating functions in low-temperature, high-humidity winter environments:

• Avoid frequent start-stops to reduce system load impacts

• If equipped with anti-freeze functionality, ensure it remains activated

• Regularly inspect outdoor unit (if applicable) for ice buildup and address promptly

Long-Term Storage:

If equipment will be idle for over one month:

• Clean all filters and accessible internal components

• Run “Dry” or “Ventilation” mode for 2-3 hours to ensure complete internal drying

• Disconnect power supply and cover unit with dust cover

• Remove remote control batteries and store separately

V. Professional Maintenance Recommendations

Refrigerant Inspection:

Combination dehumidifier/heaters rely on refrigerant circulation for mode switching. Persistent performance decline unrelated 

to above causes may indicate refrigerant shortage or leakage. Contact a qualified technician.

Circuit Board Protection:

Humid environments may compromise control circuit boards. Ensure installation avoids direct moisture exposure. During rainy 

seasons, consider using dehumidifiers to maintain ambient humidity levels.

Lifespan Extension Strategies:

• Avoid prolonged operation at extreme parameters

• Use voltage stabilizers in areas with unstable power supply

• Record operational data to track performance trends

By adhering to scientific maintenance guidelines, your dehumidifier/heater combo unit will maintain efficient and stable operation 

across diverse conditions. Regular maintenance not only enhances user experience but also prevents minor issues from escalating 

into major failures, ultimately achieving the dual benefits of maximized equipment lifespan and minimized energy consumption.