H3
Whirlpool
Compressor Overload Protection / High-Pressure Protection
Whirlpool air conditioner displays H3 and shuts down heating or cooling.
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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
Dirty condenser coil, failed outdoor fan, overcharged or restricted refrigerant system, high ambient temperature, blocked discharge air
How to Fix / Troubleshooting
Safety: Turn off power. Do not attempt to vent or adjust refrigerant yourself.
User-level steps:
- Clean the outdoor coil and ensure the fan is running.
- Remove any obstructions around the outdoor unit and ensure proper clearance.
- Allow the unit to cool for at least 30 minutes, then restart.
If H3 recurs, the system may have a serious refrigeration issue. Contact a qualified technician for pressure and temperature diagnostics.
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Repair Difficulty
Professional Required
5/5
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