Fault codes / GE Profile AC / Lo
GE Profile AC code Lo
What it means: 12 V under 10.5 V: the stat drops to OFF.
What to check
Fix voltage first: battery, converter, drop to the box under compressor start. After it recovers the screen shows a solid Lo and stays OFF until you pick a mode again.
Tech detail
Measure at the box's 12 V in while the compressor starts, not at rest.
Learn the system
Practice it on a service call
Guided diagnosis
Other GE Profile AC codes
- GE Profile AC code F1 Freeze sensor open or reading below -22°F
- GE Profile AC code F2 Freeze sensor shorted, or reading above 149°F
- GE Profile AC code F3 Outdoor coil sensor open (heat pump models)
- GE Profile AC code F4 Outdoor coil sensor shorted (heat pump models)
- GE Profile AC code F5 Outdoor temperature sensor open, or DIP switch 1 ON on a cool-only unit
- GE Profile AC code F6 Outdoor temperature sensor shorted (heat pump models)
- GE Profile AC code F7 The stat's own room sensor open
- GE Profile AC code F8 The stat's own room sensor shorted
- GE Profile AC code FC No communication with the main board: the comms (signal) wire open or shorted
- GE Profile AC: Snowflake flashing Indoor coil near freezing: compressor off, fan on
- GE Profile AC: Heat pump icon flashing with 32 Outdoor temperature under the heat pump lockout
- GE Profile AC: Heat pump icon flashing with 99 Indoor coil over 135°F: compressor off
- GE Profile AC: Blank display No 12 V at the stat
Full field guide: GE Profile RV air conditioner and RARWT thermostat
Codes come from the maker manuals and public service sheets. Your model's own chart always wins, and LP and 120 volt work belongs to a qualified technician.