H34
Panasonic Low Pressure / Refrigerant Shortage Protection

Unit stops with H34; often related to low-pressure protection.

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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.

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Possible Causes

Refrigerant leak in indoor or outdoor coil, Loose flare joints, Blocked indoor filter or coil causing low suction pressure, Faulty low-pressure sensor

How to Fix / Troubleshooting

Warning: Low refrigerant and pressure issues require a licensed HVAC technician. Do not attempt to add refrigerant yourself.

Homeowner checks:

  • 1. Clean filters and indoor coil: Dirty filters and coils can cause abnormal pressures. Clean thoroughly.
  • 2. Inspect for oil stains: Look at flare joints and coil ends for oily residue, which indicates leaks.
  • 3. Check for ice: Ice on the indoor coil or suction line suggests low refrigerant or airflow problems.

If H34 persists after cleaning, contact a Panasonic-authorized technician to locate and repair leaks, evacuate, and recharge the system to the specified amount.

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Repair Difficulty

Professional Required 5/5

Required Part

Refrigerant Circuit (Leak Repair and Recharge)
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