Quick Answer
Okay, so the AC keeps popping the breaker. Often, it's something relatively simple. It could be a clogged air filter or condenser coils making the fan motor and compressor work too hard, which are both easy DIY fixes. If not, a failing capacitor is a common issue, and while you can DIY it, it requires caution due to stored electrical charge. Worst case scenarios involve a failing motor or a compressor on its last legs. The simple fixes might cost you $20-50 and an hour of your time. Anything more complex, and you'll likely be calling an HVAC professional.
Common Symptoms
Possible Causes
Step-by-Step Diagnosis
Step 1
Turn the AC system fully OFF at the thermostat.
Step 2
Check and replace the air filter if it's dirty.
Step 3
Go outside and thoroughly clean any debris, leaves, or dirt from the outdoor condenser unit's fins.
Step 4
Reset the breaker ONCE and observe what happens when the AC tries to start.
Step 5
If it trips immediately, stop and call a pro. If it runs for a while then trips, it's likely an overheating issue.
Step 6
If it hums and then trips, the prime suspect is a bad capacitor.
DIY vs Professional Costs
| Repair Type | DIY Cost | Professional Cost | Time Required |
|---|---|---|---|
Clean Filter/Coils | $10-50 | $150-300 | 1 hour |
Replace Capacitor | $20-80 | $200-500 | 1 hour |
Replace Fan Motor | $100-350 | $500-1000+ | 2-4 hours |
Replace Circuit Breaker | $20-60 | $180-400 | 1 hour |
Replace Compressor | N/A | $1,800-$4,500+ | 4-8 hours |
When to Call a Professional Hvac
- The breaker trips immediately after you try to reset it. This indicates a dead short.
- You smell burning plastic, ozone, or any 'hot' electrical odor.
- You have cleaned the filter and coils, and the problem persists.
- You are not completely comfortable and familiar with working on high-voltage systems safely.
- You hear loud grinding, buzzing, or clanking noises from the indoor or outdoor units.
Prevention Tips
- Check your air filter monthly and change it when it's dirty, without exception.
- Gently hose down your outdoor condenser unit every spring before you start using the AC.
- Ensure at least 2 feet of clear space around the outdoor unit for proper airflow.
- Schedule an annual professional tune-up to catch failing parts before they cause a breakdown.
- If your unit causes lights to dim on startup, consider having a soft-start kit installed.
Frequently Asked Questions
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