Rheem
Capacity or Airflow Deficiency
Rheem air conditioner runs continuously and struggles to reach set temperature on very hot days.
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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
Undersized system for home load, Dirty coils reducing capacity, Duct leakage or poor insulation, Low refrigerant charge
How to Fix / Troubleshooting
Safety first: Turn off power before cleaning coils or accessing ducts.
- Clean coils and filters: Ensure both indoor and outdoor coils and filters are clean to maximize capacity.
- Seal ducts: Inspect accessible ductwork for disconnected joints or obvious leaks. Seal with mastic or UL-listed foil tape.
- Shade and load reduction: Use blinds, close windows, and reduce internal heat loads (ovens, lights) to help the system keep up.
- Professional evaluation: Have a contractor perform a load calculation and check refrigerant charge if the system is chronically undersized or underperforming.
Warning: Do not assume adding refrigerant will fix capacity issues; overcharging reduces performance.
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Repair Difficulty
Medium
3/5
Required Part
Rheem Indoor/Outdoor Coils / Duct System
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