Ariston
Poor Heating Performance (Heat Pump Models)
Unit runs in heating mode but delivers only lukewarm air and room does not heat up.
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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
Low refrigerant charge, Outdoor coil heavily frosted, Faulty reversing valve, Dirty indoor or outdoor coils
How to Fix / Troubleshooting
Safety first: Turn off power before cleaning coils. Do not attempt to service the refrigerant circuit yourself.
- Step 1 – Clean filters and coils: Clean indoor filters and both indoor and outdoor coils to ensure maximum airflow.
- Step 2 – Observe defrost cycles: In cold weather, the outdoor coil will frost and the unit should periodically defrost. If the outdoor coil remains heavily iced, the defrost system may be faulty.
- Step 3 – Check mode and setpoint: Confirm the unit is in HEAT mode and the set temperature is several degrees above room temperature.
- Step 4 – Technician diagnosis: If performance remains poor, a technician should check refrigerant charge, test the reversing valve coil, and verify proper operation of the Ariston heat pump system.
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Repair Difficulty
Hard
4/5
Required Part
Reversing Valve Coil
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