H24
Panasonic
Freeze Protection Sensor / Heater Error
Heater displays H24; may be associated with freeze protection or low ambient temperature issues.
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
Faulty freeze sensor, Open circuit in freeze heater, Damaged wiring to freeze heater, Defective PCB freeze control
How to Fix / Troubleshooting
Freeze damage risk: In cold climates, protect the unit from freezing while troubleshooting by draining water if necessary.
- 1. Check ambient conditions: If the unit is installed outdoors or in an unheated space, verify that temperatures are within Panasonic's operating range.
- 2. Inspect freeze heater wiring (qualified persons):
- Remove the front cover.
- Locate the freeze protection heaters on the water pipes and their wiring.
- Check for loose or damaged connectors.
- 3. Check freeze sensor:
- Locate the freeze sensor (thermistor) and ensure it is properly attached and wired.
- 4. If H24 persists: The freeze heater or sensor may be open‑circuit and require replacement by an authorized technician.
Advertisements
Repair Difficulty
Hard
4/5
Required Part
Freeze Protection Heater and Sensor
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements