Air conditioner runs but does not cool the room effectively (no error code displayed).

Safety first: Turn off power before cleaning coils.

Steps:

• Clean indoor filters: Remove and wash filters with mild detergent. Dry completely before reinstalling.
• Clean indoor coil: If accessible, use a soft brush and vacuum to remove dust from the evaporator fins. Do not bend fins.
• Clean outdoor unit: Clear vegetation and debris around the Bosch outdoor unit. Gently wash the condenser coil with low-pressure water.
• Check settings: Ensure the unit is in Cool mode, fan on Auto, and temperature set at least 3–5°C below room temperature. Close doors and windows.

If cooling is still poor: A Bosch technician should check refrigerant charge and system performance. Undersized units may never reach setpoint in extreme conditions.