5 Reasons Your Dehumidifier Isn't Collecting Water

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Introduction
Reason #1: Humidity Sensor Malfunctions
Reason #2: Refrigerant Leaks and Refilling
Reason #3: Electrical Circuit Overloads
Reason #4: Compressor Failure Issues
Reason #5: Clogged Air Filters
Helpful Guides to Help You Fix Your Dehumidifier (Videos)
Final Thoughts on Dehumidifiers Not Collecting Water

5 Reasons Your Dehumidifier Isn't Collecting Water

Curated by

jenengevik

3 min read

722

Dehumidifiers that run but fail to collect water are a common household frustration, often stemming from issues like incorrect humidity settings, dirty components, or faulty compressors. While the problem can be perplexing, understanding the potential causes is the first step toward restoring your dehumidifier's effectiveness and maintaining a comfortable indoor environment.

Reason #1: Humidity Sensor Malfunctions

Humidity sensor malfunctions can significantly impact a dehumidifier's performance, often leading to inaccurate readings and inefficient operation. The table below summarizes common issues and their effects on dehumidifier functionality:

Issue	Effect on Dehumidifier
Continuous running	Dehumidifier fails to shut off due to inaccurate humidity readings 1
Failure to turn on	Unit doesn't activate even in high humidity conditions 1
Inaccurate readings	Display panel shows inconsistent or incorrect humidity levels 1
Sensor saturation	Humidity readings stuck near 100%, especially after exposure to high moisture 2

Humidity sensors are prone to failure when exposed to condensing environments or prolonged periods of high humidity

. This is particularly problematic for outdoor sensors or those in consistently damp areas like bathrooms. Sensor failure can lead to erroneous humidity data, potentially undermining the reliability of weather predictions and climate analyses if not properly addressed

. In some cases, a malfunctioning humidity sensor may cause issues with a vehicle's air conditioning system, such as preventing the recirculation feature from working correctly

4 sources

Reason #2: Refrigerant Leaks and Refilling

damagecontrol-911.co...

Refrigerant leaks can significantly impact a dehumidifier's performance, leading to inefficient operation and potential health hazards. Understanding the causes, signs, and proper handling of refrigerant leaks is crucial for maintaining a safe and effective dehumidification system.

Causes of refrigerant leaks:
- Age-related wear and tear on joints, connections, and rubber seals
  1
  2
- Pinhole leaks caused by corrosion from volatile organic compounds (VOCs)
  1
- Vibrations from improperly sealed compressor motors
  1
- Physical damage to the condenser coil
  3
Signs of a refrigerant leak:
- Reduced cooling efficiency and longer cooling times
  2
- Increased energy bills
  2
- Ice buildup on the air conditioning unit
  2
- Hissing sounds from the unit
  2
  4
- Warm air or weak airflow from vents
  5
Dangers of refrigerant leaks:
- Health risks, including refrigerant poisoning with symptoms like headaches, dizziness, and irritation
  1
- Environmental harm due to release of chemicals
  5
- Strain on the dehumidifier's components, potentially leading to compressor failure
  1
Proper handling of refrigerant leaks:
- Always consult a certified HVAC professional for repairs
  1
- Avoid attempting to refill refrigerant without addressing the underlying leak
  1
- Consider replacing older units (over 15 years) if leaks are frequent
  3

It's important to note that refrigerant is not consumed during normal operation and should not need regular refilling. Any loss of refrigerant indicates a leak that requires professional attention

5 sources

Reason #3: Electrical Circuit Overloads

jonesservices.com

Electrical circuit overloads can cause dehumidifiers to trip breakers or blow fuses, disrupting their operation. This issue often occurs when a dehumidifier is connected to a circuit that is already heavily loaded or has insufficient amperage capacity. For example, a dehumidifier sharing a 15-amp circuit with a washing machine may exceed the circuit's capacity, leading to tripping.

To prevent overloads, it's recommended to use dehumidifiers on dedicated circuits or circuits with adequate amperage. If a circuit repeatedly trips, it may indicate a wiring problem, such as a loose connection causing voltage drops, rather than an issue with the dehumidifier itself.

In such cases, professional inspection of the electrical system is advisable to ensure safety and proper functioning of the appliance.

5 sources

Reason #4: Compressor Failure Issues

Compressor issues can significantly impact a dehumidifier's ability to collect water. Here are some common compressor-related problems that can lead to reduced water collection:

Faulty compressor: May not start or run properly, preventing the cooling process necessary for moisture extraction
1
2
Low refrigerant: Inadequate cooling of the coils, resulting in inefficient dehumidification
2
Overheating: Can cause the compressor to shut off prematurely, reducing overall operation time
1
Electrical problems: Issues with capacitors or relays can prevent the compressor from starting or running consistently
3
Age-related wear: Older compressors may lose efficiency over time, leading to decreased performance
2
Frozen coils: Can occur due to compressor issues, preventing proper moisture extraction
1
2

If you suspect compressor problems, it's best to consult a professional technician, as compressor repairs often require specialized knowledge and tools

3 sources

Reason #5: Clogged Air Filters

Improper maintenance and clogged components can significantly impair a dehumidifier's ability to collect water. Here are the key issues to watch out for:

Dirty air filters: Restrict airflow, reducing the unit's efficiency
1
2
Clogged condenser or evaporator coils: Hinder moisture extraction and air circulation
1
2
Blocked diffusers or closed dampers: Obstruct dehumidified air distribution
1
Worn or stretched blower belts: Affect air circulation and overall performance
1
Debris in remote condenser coils: Restrict airflow in cooling mode
1
Build-up of slime or fungal growth: Can block drainage channels and hoses
3

Regular cleaning and maintenance of these components are crucial for ensuring optimal dehumidifier performance and preventing water collection issues.

For persistent problems, consulting a professional HVAC technician is recommended.

3 sources

Helpful Guides to Help You Fix Your Dehumidifier (Videos)

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Final Thoughts on Dehumidifiers Not Collecting Water

Understanding the relationship between ambient temperature and dehumidifier performance is crucial for effective moisture control. Compressor dehumidifiers typically operate optimally within a temperature range of 65°F to 90°F (18°C to 32°C)

. At lower temperatures, the evaporator coil may freeze, impeding moisture extraction. Modern dehumidifiers often incorporate auto-defrost features to mitigate this issue, but in consistently cool environments, a desiccant dehumidifier might be more suitable as it functions well even at lower temperatures

. For warmer room temperatures, compressor dehumidifiers are generally more efficient, with their condenser coils effectively removing moisture from the air. Regardless of the type, proper maintenance of both evaporator and condenser coils is essential for optimal performance and longevity of the unit.

5 sources

How do warmer temperatures impact the efficiency of modern dehumidifiers

What role do dehumidifiers play in maintaining a consistent ambient temperature

How do different types of dehumidifiers handle varying air temperatures

What are the benefits of using a desiccant dehumidifier in warmer climates

How does the performance of a compressor dehumidifier change with higher ambient temperatures

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