Lennox AC Error Code 412
High suction pressure — the pressure on the compressor suction side is too high.
⚠️ Symptoms You'll Notice
- • Compressor protection
- • Weak cooling
- • System cycles off
- • Compressor may be shutting down
What Causes Error Code 412?
🔧 DIY Troubleshooting Steps
- 1 Check that supply line feels cold and return line feels warm
- 2 Don't attempt refrigerant adjustments
- 3 Verify compressor isn't icing up
- 4 Note the error for technician
📞 When to Call a Professional
High suction pressure needs professional expansion valve or control diagnostics.
Estimated repair cost in Albuquerque: $250–$700
Top Air Conditioner Repair Contractors in Albuquerque
Vetted, reviewed, and ready to fix Lennox error code 412 · 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 Air Conditioner error code 412 mean? ▼
High suction pressure — the pressure on the compressor suction side is too high.
How much does it cost to fix error code 412 in Albuquerque? ▼
Typical repair costs in Albuquerque for Lennox Air Conditioner error code 412 range from $250–$700. High suction pressure needs professional expansion valve or control diagnostics.
Can I fix Lennox error code 412 myself? ▼
Some basic troubleshooting is safe to try: Check that supply line feels cold and return line feels warm. Don't attempt refrigerant adjustments. High suction pressure needs professional expansion valve or control diagnostics.
Other Lennox Air Conditioner Error Codes
Error Codes from Other Brands
Still Getting Error Code 412?
Get matched with a licensed Lennox air conditioner repair technician in Albuquerque — free, no obligation.
Get 3 Free Repair Quotes →