Rheem inverter system shows F2 and may cycle off prematurely or fail to reach set temperature.

Safety first: Turn off power at the outdoor disconnect and breaker.

• Find the sensor: The outdoor ambient sensor is typically mounted near the outdoor coil or on the control panel bracket, exposed to outside air.
• Check mounting location: Ensure it is not touching hot discharge lines or in direct sunlight. Relocate to a shaded, free-air location if improperly placed.
• Inspect and test: Check wiring for damage. Disconnect and measure resistance, comparing to Rheem’s ambient temperature chart. Replace if defective.
• Secure wiring: Reattach the sensor firmly and route wires away from sharp edges and moving parts.

Warning: Do not relocate the sensor far from its designed position without following Rheem’s guidelines, as it affects system logic.