Trane Furnace Error Code 4-5
Control circuit lockout — the control board has detected a fault in its own circuitry and shut down.
⚠️ Symptoms You'll Notice
- • Complete furnace failure
- • Won't respond to thermostat
- • No power or display
- • System is completely dead
What Causes Error Code 4-5?
🔧 DIY Troubleshooting Steps
- 1 Make sure power is reaching the furnace at the breaker
- 2 Check for burned smell or visible damage
- 3 Try powering off for 5 minutes then back on
- 4 Look for any tripped breakers
📞 When to Call a Professional
Control board replacement is necessary — likely due to electrical damage.
Estimated repair cost in Albuquerque: $400–$900
Top Furnace Repair Contractors in Albuquerque
Vetted, reviewed, and ready to fix Trane error code 4-5 · 34,721+ total reviews
Hi-Tech Heating and Cooling
AC Repair · Electrical · Heat Pump
BakerHouse Service - HVAC and Refrigeration
AC Installation · AC Repair · Commercial HVAC
EP Mechanical Technologies Inc.
AC Repair · Heating
Beyond Heating and Cooling Inc
AC Repair · Heating
Kidzz Mechanical
AC Repair · Boiler Service · Heating
Frequently Asked Questions
What does Trane Furnace error code 4-5 mean? ▼
Control circuit lockout — the control board has detected a fault in its own circuitry and shut down.
How much does it cost to fix error code 4-5 in Albuquerque? ▼
Typical repair costs in Albuquerque for Trane Furnace error code 4-5 range from $400–$900. Control board replacement is necessary — likely due to electrical damage.
Can I fix Trane error code 4-5 myself? ▼
Some basic troubleshooting is safe to try: Make sure power is reaching the furnace at the breaker. Check for burned smell or visible damage. Control board replacement is necessary — likely due to electrical damage.
Other Trane Furnace Error Codes
Error Codes from Other Brands
Still Getting Error Code 4-5?
Get matched with a licensed Trane furnace repair technician in Albuquerque — free, no obligation.
Get 3 Free Repair Quotes →