Toshiba Dehumidifier: not cooling

Professional Repair Guide

What is this symptom?

Experiencing issues with your Toshiba dehumidifier not cooling or dehumidifying? If the unit runs but fails to collect water, it might be due to clogged filters, low temperatures, or compressor issues. Understanding these common causes can help you troubleshoot effectively.

Urgency: Medium

Important Tips for Toshiba Models

  • Official manuals emphasize proper placement and ambient temperature; coils may ice at low temperatures reducing performance.

Possible Causes

Clogged or dirty air filter reducing airflow

How to Identify: Check filter for visible dust buildup and reduced airflow from intake grill

Part: Air filter

Low ambient temperature causing compressor coils to freeze or not condense moisture

How to Identify: Unit used in cold environment below ~15–18 °C; coils iced or frost present; no water collection

Part: Evaporator coils / compressor functionality

Faulty or weak compressor leading to poor refrigerant cycle

How to Identify: Unit runs but coils do not get cold; low or no moisture collected despite warm environment and clean filters

Part: Compressor / refrigerant system

Full water tank or float switch engaged

How to Identify: Dehumidifier stops collecting water and shuts off or runs without collecting further water

Part: Water tank float switch

DIY Solutions

Clean or replace air filter

Easy 10–20 minutes
Tools Needed: soft brush or vacuum
  1. Turn off and unplug unit
  2. Remove and locate the air filter
  3. Vacuum or gently wash/brush filter to remove dust
  4. Allow filter to dry completely if washed then re‑install
  5. Restart dehumidifier and check performance
⚠️ Safety First: Always disconnect power before maintenance

Move unit to warmer location

Easy 5 minutes
  1. Turn off and unplug the dehumidifier
  2. Move unit to a room with ambient temperature above ~18 °C
  3. Ensure adequate clearance around unit for airflow
  4. Restart and observe moisture removal
  5. If ice had formed, allow coils to defrost fully before restart
⚠️ Safety First: Do not operate in freezing temperatures to avoid coil damage

Professional Repairs

Compressor or refrigerant repair

Estimated Cost: $150 - $400

Internal coil or control board repair

Estimated Cost: $200 - $500

When to Call a Professional

Unit under warranty and still not working after DIY maintenance
Compressor suspected faulty (no cooling on coils)
Strange noises or burning smell

Preventive Maintenance

  • Clean air filter: Reduced airflow and poor dehumidification
    Frequency: every 2‑4 weeks
  • Operate in recommended temperature range: Coil freezing and inefficient moisture removal
    Frequency: Always

Frequently Asked Questions

Why is my Toshiba Dehumidifier not cooling/not dehumidifying?
Common causes include clogged air filters, low ambient temperatures, faulty compressors, or a full water tank.
How do I fix Toshiba Dehumidifier not cooling/not dehumidifying myself?
You can clean or replace the air filter and move the unit to a warmer location to improve performance.
How much does it cost to fix not cooling/not dehumidifying?
Professional repairs can range from $150 to $500 depending on the issue, like compressor or coil repairs.
When should I call a technician for not cooling/not dehumidifying?
If DIY solutions fail or if you suspect compressor or internal component issues, it's best to call a technician.

References & Sources

Community Analytical Insights

Analysis based on real user discussions from appliance repair communities

Can I Fix This Myself?

65%
DIY Success Rate Difficulty: Either

Common Issues Reported by Users

  • Compressor not receiving power due to faulty capacitor or electrical issues
  • Dirty or clogged air filter restricting airflow
  • Refrigerant leak causing insufficient cooling

User Suggested Solutions

  1. Check the capacitor for continuity and replace if faulty. Ensure the compressor circuit is receiving voltage using a multimeter. If there is no voltage, inspect the wiring and connections.

  2. Remove and clean or replace the air filter. Ensure the dehumidifier is free from dust and debris to allow for proper airflow.

  3. Inspect for refrigerant leaks by checking the coils and lines for signs of moisture. If a leak is found, contact a professional to recharge the refrigerant and repair the leak.

Analysis based on 1 community discussions
View Sources

Data compiled from real discussions on r/appliancerepair and r/Appliances:

  1. Repair Toshiba Dehumidifier

Community Discussions

compressor not coming on

Test the capacitor and ensure the compressor circuit is getting voltage.

DIY View on Reddit →

Source: Reddit r/appliancerepair

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