Carrier Furnace Error Code 33
Limit circuit fault — the furnace temperature sensor or limit switch is giving faulty readings to the control board.
⚠️ Symptoms You'll Notice
- • Furnace shuts off after brief run
- • Temperature readings seem wrong
- • Frequent cycling on and off
- • LED flashing 3-3 pattern
What Causes Error Code 33?
🔧 DIY Troubleshooting Steps
- 1 Check for loose or corroded wires on the limit switch and temperature sensor
- 2 Look at the sensor location — is it covered in dust or debris?
- 3 Make sure furnace has good airflow and isn't overheating
- 4 Reset the furnace control board
📞 When to Call a Professional
Limit switches and temperature sensors require professional testing and replacement.
Estimated repair cost in Albuquerque: $200–$400
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Frequently Asked Questions
What does Carrier Furnace error code 33 mean? ▼
Limit circuit fault — the furnace temperature sensor or limit switch is giving faulty readings to the control board.
How much does it cost to fix error code 33 in Albuquerque? ▼
Typical repair costs in Albuquerque for Carrier Furnace error code 33 range from $200–$400. Limit switches and temperature sensors require professional testing and replacement.
Can I fix Carrier error code 33 myself? ▼
Some basic troubleshooting is safe to try: Check for loose or corroded wires on the limit switch and temperature sensor. Look at the sensor location — is it covered in dust or debris?. Limit switches and temperature sensors require professional testing and replacement.
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