A:Answer Hi Koba, thank you for your inquiry! The numbers blinking on the LED display of an Insignia 250 Sq. Ft. Portable Air Conditioner (Model: NS-AC06PWH1) may indicate a malfunction or error with the unit. It could be a sign that there is a problem with the control panel, the temperature sensor, or another component of the air conditioner. It is recommended to refer to the user manual for troubleshooting steps. For more information about this product, you may click this link: https://www.bestbuy.com/site/insignia-250-sq-ft-portable-air-conditioner-white/6393188.p?skuId=6393188. Carlo | Insignia Products