Rheem
High Inrush Current / Electrical Supply Issue
Rheem air conditioner causes lights to dim or breakers to trip when the compressor starts.
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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
Weak or undersized breaker, Loose electrical connections at disconnect or panel, Failing compressor drawing high starting current, Missing or failed start assist kit (if equipped)
How to Fix / Troubleshooting
Safety first: Electrical work should be done with power off and by qualified persons. Turn off the main breaker before tightening lugs.
- Inspect connections: Check line-voltage connections at the outdoor disconnect and inside the condenser control box. Tighten any loose lugs.
- Check breaker size: Compare the breaker rating to the Rheem unit nameplate minimum and maximum fuse/breaker size. Correct any mismatch.
- Start assist: If the unit uses a factory start kit, verify it is connected and not visibly damaged. A technician can test and replace it if needed.
- Compressor health: If dimming persists, a technician should measure starting current and evaluate compressor condition.
Warning: Do not oversize breakers beyond manufacturer specifications to stop nuisance trips.
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Repair Difficulty
Hard
4/5
Required Part
Rheem Outdoor Unit Electrical Connections / Start Assist Kit / Breaker
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