H24
Panasonic
Outdoor Air Temperature Sensor Fault
Unit stops with H24; often related to outdoor air temperature reading.
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
Failed outdoor ambient thermistor, Sensor dislodged from mounting point, Broken sensor wiring, Faulty outdoor PCB
How to Fix / Troubleshooting
Safety first: Isolate power before working on the outdoor unit.
Steps:
- 1. Locate ambient sensor: It is usually mounted near the outdoor air intake grille, not directly on the coil.
- 2. Inspect sensor body and cable: Look for cracks, UV damage, or rodent-chewed wires.
- 3. Check connector: Follow the cable to the PCB and ensure the connector is fully seated.
- 4. Replace if defective: If the sensor is physically damaged or tests open/short, replace it with a Panasonic outdoor ambient thermistor.
After replacement, clear the error by powering the system off for several minutes, then restart.
Advertisements
Repair Difficulty
Medium
3/5
Required Part
Outdoor Ambient Thermistor
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements