Quick answer
To reset a 20A breaker, first turn it fully off, then back on. If it trips again, unplug devices and try again. If it still trips, there may be a wiring issue.
Confirm the symptom
- Circuit breaker labeled 20A is in the 'off' position or mid-position.
- Lights or outlets on that circuit are not working.
- Breaker trips again immediately after resetting.
Tools and prep
- Non-contact voltage tester
- Insulated screwdriver
- Dry hands and non-conductive shoes
- Turn off main power if working inside panel
Step-by-step troubleshooting
- Step 1: Locate the Tripped BreakerDo: Find the 20A breaker in your electrical panel that is in the 'off' position or partially switched.Observe: Breaker is not aligned with other breakers.Means: This is the tripped breaker causing the outage.Next: Step 2
- Step 2: Turn Breaker Fully OffDo: Push the breaker firmly to the 'off' position.Observe: Breaker clicks into place and stays fully off.Means: Resetting requires a full cycle.Next: Step 3
- Step 3: Turn Breaker Back OnDo: Switch the breaker back to the 'on' position.Observe: Breaker stays on without tripping.Means: Reset successful; circuit is restored.Next: Step 4
- Step 4: Test the CircuitDo: Plug in a device or turn on lights connected to the circuit.Observe: Device powers on and works normally.Means: Circuit is functioning properly.Next: Done
- Step 5: If Breaker Trips AgainDo: Unplug all devices on the circuit and reset the breaker again.Observe: Breaker stays on after unplugging devices.Means: Overload was the cause; redistribute load.Next: Step 6
- Step 6: Check for Persistent IssuesDo: Plug devices back in one at a time to identify the problematic one.Observe: Breaker trips when a specific device is plugged in.Means: Faulty device or wiring issue.Next: Call a professional
Common causes
| Cause | Likelihood | Difficulty | Part often needed |
|---|---|---|---|
| Overloaded Circuit Too many devices drawing power beyond 20A capacity. | Common | Easy | None |
| Short Circuit Wires touching, causing sudden surge. | Sometimes | Medium | Wire connectors or insulation |
| Faulty Appliance A device drawing excessive current. | Common | Easy | Appliance repair or replacement |
| Wiring Issues Damaged or loose wires in the circuit. | Sometimes | Hard | Electrical wire or professional service |
| Breaker Failure Internal damage or wear in the breaker itself. | Rare | Medium | Replacement 20A breaker |
| Ground Fault Current leaking to ground, often in wet areas. | Sometimes | Medium | GFCI outlet or wiring repair |
Parts matching
If parts are needed, match these to your situation:
- 20A circuit breaker replacement (if breaker is faulty)
- Wire connectors or insulation tape (for exposed wires)
- GFCI outlet (for ground faults in kitchens, bathrooms)
- Circuit tester or multimeter (for diagnosing issues)
Always match the amperage and type (standard, GFCI, AFCI) to your circuit requirements.
When to call a professional
- Breaker continues to trip after removing all devices.
- You smell burning or see physical damage to the breaker.
- You hear buzzing or popping sounds from the panel.
- The breaker feels hot to the touch.
- You're unsure about the cause or lack proper tools for diagnosis.
FAQ
Can I replace a 20A breaker with a higher amperage?
No, using a higher amperage breaker can cause wiring to overheat and pose a fire risk.
Why does my 20A breaker trip even with light use?
This may indicate a short circuit, ground fault, or faulty breaker. Check wiring and devices.
How do I know if an appliance is causing the trip?
Unplug all devices, reset the breaker, then plug in appliances one by one to identify the culprit.
Is it normal for a breaker to feel warm?
Slight warmth is normal, but if it's hot or discolored, it may be faulty and needs replacement.
Can a tripped breaker cause damage to my devices?
Usually not, but repeated tripping can indicate underlying issues that might affect electronics.