Dyson Purifier Not Connecting or Filtering

The Dyson Purifier Cool Formaldehyde TP09 combines air purification with app-connected monitoring and control. This guide covers connectivity and performance issues.

Purifier Not Connecting to WiFi

Symptoms

• WiFi icon not illuminating
• Dyson app can't find purifier
• Setup fails repeatedly

Solutions

1. Use Dyson Link app - Download Dyson Link (or MyDyson) app for setup.
2. Enter pairing mode - Hold power button for 5 seconds until WiFi icon flashes.
3. 2.4GHz or 5GHz - Newer Dysons support both bands. Try 2.4GHz first.
4. Factory reset - Hold power button for 20+ seconds to reset network settings.
5. Bluetooth enabled - Enable phone Bluetooth during initial setup process.

Air Quality Not Improving

Symptoms

• Air quality index stays poor
• Particulates not decreasing
• Formaldehyde levels unchanged

Solutions

1. Check filter status - Replace filters when app indicates. HEPA and carbon filters expire.
2. Seal filter properly - Ensure filters are correctly seated with no gaps.
3. Room size - TP09 is rated for specific room size. May struggle in larger spaces.
4. Run on Auto - Auto mode adjusts speed based on detected pollutants.
5. Continuous source - If readings never improve, identify and eliminate pollution source.

Sensor Issues

Symptoms

• Sensors show no readings
• Readings seem inaccurate
• Formaldehyde sensor not detecting

Solutions

1. Warm up period - Sensors need time to calibrate after power on. Wait 30 minutes.
2. Clean sensor inlet - Dust blocking sensor vents affects readings. Gently vacuum inlet.
3. Formaldehyde sensor - This sensor is catalytic and never needs replacement. May take time to detect.
4. Firmware update - Check app for sensor calibration updates.

Remote and App Control

Symptoms

• Remote not working
• App shows offline
• Can't adjust settings

Solutions

1. Remote battery - Replace CR2032 battery in the magnetic remote.
2. Remote storage - Remote attaches magnetically to top of purifier. Don't lose it.
3. App refresh - Pull down in app to refresh connection status.
4. Check WiFi - Verify purifier's WiFi connection in machine settings.

Noise and Operation

Symptoms

• Excessive noise at low speeds
• Airflow weak
• Unusual vibration

Solutions

1. Check for obstruction - Ensure nothing is blocking air inlet or outlet.
2. Filter installation - Incorrectly installed filters can cause noise and reduced airflow.
3. Level surface - Place on flat surface to prevent vibration.
4. Night mode - Use Night mode for quietest operation with display dimmed.