Unit displays correct temperature but actual room temperature is much higher or lower.

Safety: Turn off power before moving sensors.

Steps:

• Compare temperatures: Use a reliable room thermometer placed away from the unit to compare with the displayed temperature.
• Check sensor location: Ensure the room thermistor is in the return air stream, not touching the coil or near hot electronics.
• Avoid heat sources: Do not place lamps, TVs, or other heat sources directly under the indoor unit.

Technician recommended: If readings are significantly off, a technician can replace the room thermistor or adjust calibration if supported.