Air conditioner does not turn on at all; display is blank and no sounds are heard.

Safety: Before opening the unit, unplug it. If you must check voltage, use proper insulated tools and meters.

Steps:

• Check outlet and breaker: Plug a lamp or tester into the same outlet to confirm power. Reset any tripped breakers or GFCI outlets.
• Inspect power cord: Look for cuts, burns, or loose plug blades. Replace the cord set if damaged.
• Try a different outlet: Avoid extension cords; plug directly into a properly grounded outlet.
• Internal fuse: If comfortable, remove the front cover and locate the control board. Many Whirlpool units have a small glass or blade fuse on the board. If blown, replace with the same rating. If it blows again immediately, there is a deeper electrical fault requiring a technician.

If the unit remains dead after these checks, the main control board or line filter may be defective and should be diagnosed by a professional.