Lennox Furnace Error Code 9 Flashes
Check polarity or grounding — there's an electrical polarity or ground issue with the furnace.
⚠️ Symptoms You'll Notice
- • Furnace won't start
- • Intermittent operation
- • Unstable behavior
- • Error codes appear
What Causes Error Code 9?
🔧 DIY Troubleshooting Steps
- 1 Do not operate if polarity seems reversed
- 2 Turn the system off and call a licensed HVAC technician.
📞 When to Call a Professional
Electrical polarity and grounding issues need professional correction.
Estimated repair cost in Albuquerque: $100–$300
Top Furnace Repair Contractors in Albuquerque
Vetted, reviewed, and ready to fix Lennox error code 9 · 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 Lennox Furnace error code 9 mean? ▼
Check polarity or grounding — there's an electrical polarity or ground issue with the furnace.
How much does it cost to fix error code 9 in Albuquerque? ▼
Typical repair costs in Albuquerque for Lennox Furnace error code 9 range from $100–$300. Electrical polarity and grounding issues need professional correction.
Can I fix Lennox error code 9 myself? ▼
Some basic troubleshooting is safe to try: Do not operate if polarity seems reversed. Turn the system off and call a licensed HVAC technician.. Electrical polarity and grounding issues need professional correction.
Other Lennox Furnace Error Codes
Error Codes from Other Brands
Still Getting Error Code 9?
Get matched with a licensed Lennox furnace repair technician in Albuquerque — free, no obligation.
Get 3 Free Repair Quotes →