Trane Furnace Error Code 3-4
Ignition proving failure — the control board can't confirm the igniter is working properly.
⚠️ Symptoms You'll Notice
- • Furnace won't ignite
- • No spark or click sound
- • System shuts down after startup attempt
- • No heat
What Causes Error Code 3-4?
🔧 DIY Troubleshooting Steps
- 1 Listen for a click or spark sound during ignition attempt
- 2 Check the ignition wire is properly connected
- 3 Look for any obvious damage or corrosion
- 4 Try a complete power reset
📞 When to Call a Professional
Ignition system repair requires professional service — igniter replacement is most common.
Estimated repair cost in Albuquerque: $200–$500
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Frequently Asked Questions
What does Trane Furnace error code 3-4 mean? ▼
Ignition proving failure — the control board can't confirm the igniter is working properly.
How much does it cost to fix error code 3-4 in Albuquerque? ▼
Typical repair costs in Albuquerque for Trane Furnace error code 3-4 range from $200–$500. Ignition system repair requires professional service — igniter replacement is most common.
Can I fix Trane error code 3-4 myself? ▼
Some basic troubleshooting is safe to try: Listen for a click or spark sound during ignition attempt. Check the ignition wire is properly connected. Ignition system repair requires professional service — igniter replacement is most common.
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