F1
Tempstar
Indoor Ambient Temperature Sensor Fault
Tempstar ductless mini-split indoor unit shows F1 and does not respond to remote commands
Advertisements
Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
Advertisements
Possible Causes
Open or shorted room temperature thermistor, Disconnected sensor harness, Faulty indoor control board input
How to Fix / Troubleshooting
Safety first: Turn OFF power to the indoor unit at the breaker.
Steps:
- 1. Remove front cover: Open the front panel of the Tempstar mini-split indoor unit to access the control area.
- 2. Locate room sensor: The ambient thermistor is usually near the air intake grille, connected by small wires to the control board.
- 3. Check connection: Ensure the sensor plug is firmly seated on the board and wires are not broken.
- 4. Visual inspection: If the sensor body is damaged or corroded, it should be replaced with the correct Tempstar thermistor.
- 5. If F1 remains after reseating: A new sensor or control board may be required; this is typically a technician-level repair.
Advertisements
Repair Difficulty
Medium
3/5
Required Part
Indoor Ambient Thermistor
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements