Philips AC2889 code C7: replace carbon filter

Code C7 on the Philips AC2889 identifies the activated-carbon filter replacement interval, distinct from the A3 HEPA code. Read the exact indicator before resetting anything: filter, air-quality, network and motor warnings do not mean the same thing. Keep the unit upright with its inlets clear and use only the controls and removable items named in the manual. What the alert means: The purifier has counted enough use to request its odour and gas-filtering carbon stage rather than the particle filter. What to distinguish first: Read C7 exactly and inspect the carbon-filter position; do not discard the HEPA element solely because both sit behind one panel. 1. Confirm the exact symptom — The purifier has counted enough use to request its odour and gas-filtering carbon stage rather than the particle filter. 2. Prepare safely — Turn the purifier off and unplug it before opening a cover, cleaning a sensor or touching a filter. 3. Apply the official check — Fit the specified activated-carbon filter without washing it, restore the panel and complete the documented reset sequence. 4. Interpret one retest — Confirm C7 clears and the fan operates normally. If it persists, check filter orientation before asking Philips for support. The official Philips procedure identifies this exact symptom and supports the checks above. Do not wash a non-washable HEPA or carbon filter and keep liquids away from the fan and sensor electronics. Stop and contact support if a motor code remains, the fan does not start or there is heat, smoke or an electrical smell.