---
title: How do I replace the filter on my CrewProtect Mini?
description: Replacing the cartridge in your CrewProtect 20 unit is simple and only takes a few seconds. This guide shows you how to properly remove the used cartridge, install the new one with the RFID in the correct position, and verify that the system is functioning.
---
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June 24, 2025
# How do I replace the filter on my CrewProtect Mini?
The CrewProtect 20 uses a replaceable cartridge located on the back side of the unit. Unlike the larger CrewProtect 100, this version has a simpler design and requires no tools to replace the cartridge. Proper installation ensures that the unit’s onboard RFID sensor activates the system.
### Step-by-Step Instructions
1. Power Off the Unit (Recommended)
- While not strictly necessary, powering down the unit before handling is a good practice to avoid false sensor readings.
2. Remove the Old Cartridge
- Locate the two tabs—one on each end of the cartridge.
- Press both tabs in and gently pull the cartridge straight out.
- Dispose of the used cartridge as regular trash.
3. Unpack the New Cartridge
- Remove the cartridge from its packaging.
- Locate the RFID sensor tag (typically indicated by a label or embossed section).
4. Install the New Cartridge
- Orient the RFID tag toward the bottom of the unit.
- Insert the cartridge and push until you hear it click into place.
5. Power On and Verify
- Turn on the unit.
- All lights should flash briefly, followed by a steady blue light, which indicates successful RFID recognition and normal operation.
### Troubleshooting
- Blue light not showing?
Remove and reinstall the cartridge, ensuring the RFID tag is at the bottom.
- If the issue persists, contact TFT Technical Support via the Learning Hub.
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