Remote may not work due to various reasons. Check if batteries are properly installed and functioning. Try adjusting the batteries in the compartment to ensure proper contact with the springs. Verify that the remote is compatible with your equipment. This remote does not require programming unless specified as a universal remote. Some units may require pairing the remote with the TV. In some cases, the unit's infrared receiving diode may be faulty, especially in older models or VCRs. Model Number: YAC1FB Compatible with Tadiran Air Conditioner Compatible Models: YAC1FB, YAC1FB6, YAC1FB9 Battery Required: 2 x AAA (not included) This remote control is compatible with the following models (Indoor): EACS-07HC EACS-09HC EACS-12HC EACS-18HC ZACS-07 HPF/A17/N1 Color: White Material: Plastic Package Contents: 1 x Air Conditioner Remote Control Note: Light and display differences may cause slight color variation between the image and the actual item. Measurement may vary by +/- 1-3 cm.