Unit frequently turns on and off (short cycling) without reaching set temperature.

Safety first: Turn off power before accessing sensors or PCB.

• Check sensor location: Ensure the room temperature sensor is not directly in the cold air stream or near heat sources (lamps, electronics). Reposition if possible according to Sharp guidelines.
• Clean filters and coil: Dirty filters can cause uneven temperature distribution and false readings.
• Fan speed setting: Use a lower fan speed to reduce drafts directly on the sensor.
• Sensor replacement: If the unit still short cycles, replace the room temperature thermistor.
• Capacity mismatch: If the unit is significantly oversized, consider using a lower setpoint range or consulting an HVAC professional about proper sizing.