Remote may not work due to several reasons: batteries may be dead or improperly installed. Try rolling the batteries inside the battery compartment, as this can help establish a better connection if the springs are not contacting the batteries properly. The remote might not be compatible with your device. Ensure the remote does not require programming unless specified as a universal remote. Some remotes need to be paired with your TV. If your unit's infrared receiving diode is faulty, especially common in older units or VCRs, the remote may not function. Model Number: YAC1FB For 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 variations between the color of the item in the image and the actual product. Measurement error allowance is +/- 1-3 cm.