Coleman
High Inrush Current / Electrical Supply Issue
Coleman air conditioner causes lights to dim or breakers to trip when starting.
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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 compressor start components, Undersized electrical service to Coleman condenser, Loose main lugs in panel, Shared circuit with other large loads
How to Fix / Troubleshooting
Safety: Electrical work should be done with power OFF and, for panel work, by a qualified electrician.
- Inspect start components: Have a technician test and replace the compressor start capacitor and potential relay or hard-start kit if weak.
- Check breaker and wiring size: Verify the breaker and wire gauge match the Coleman unit’s nameplate MCA and MOCP ratings.
- Dedicated circuit: Ensure the condenser is on a dedicated circuit, not shared with other large appliances.
- Panel inspection: An electrician should check for loose or corroded main lugs and bus connections that can cause voltage drop.
Warning: Do not oversize breakers beyond manufacturer specifications to stop nuisance trips.
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Repair Difficulty
Hard
4/5
Required Part
Compressor Hard Start Kit
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