Luxaire
Insufficient Cooling Capacity / Underperformance
Luxaire air conditioner runs but does not cool the home effectively; supply air is only slightly cooler than room temperature.
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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 evaporator coil, Dirty condenser coil, Low refrigerant charge, Undersized Luxaire system for home load
How to Fix / Troubleshooting
Safety: Turn off power before cleaning coils or opening panels.
- Check thermostat settings: Ensure the thermostat is set to COOL and the temperature is at least 3–5°F below room temperature. Verify fan is set to AUTO.
- Replace air filter: Install a clean filter to restore proper airflow.
- Clean indoor coil (accessible units): Remove the coil access panel. Use a soft brush and a no‑rinse evaporator coil cleaner approved for aluminum/copper coils. Avoid bending fins.
- Clean outdoor coil: As described earlier, rinse the Luxaire condenser coil from inside out with low‑pressure water.
- Measure temperature drop: After 15–20 minutes of operation, measure the temperature at a return grille and a nearby supply register. A typical Luxaire system should show about 16–22°F drop. If much lower or higher, call a technician to check refrigerant charge and system sizing.
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Repair Difficulty
Medium
3/5
Required Part
Evaporator Coil
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