HVAC Troubleshooting Guide
Expert solutions for common heating and cooling problems. Diagnose issues quickly and know when to call a professional.
Find Solutions to Your HVAC Problems
Navigating the complexities of heating, ventilation, and air conditioning systems doesn't have to be a challenge. Whether you're facing unexpected noises, inconsistent temperatures, or complete system failures, our expert troubleshooting guides help you identify, understand, and address common HVAC issues. Know when a DIY fix will work and when it's time to call the professionals.
Air Conditioning Issues
AC Not Cooling
Diagnose why your AC isn't cooling
AC Blowing Warm Air
Troubleshoot warm air from vents
AC Freezing Up
Steps to safely thaw frozen coils
AC Short Cycling
Why your AC keeps turning on and off
AC Fan Not Working
Diagnose fan motor problems
AC Refrigerant Leak
Signs and solutions for low refrigerant
AC Capacitor Failure
Symptoms of a bad capacitor
AC Compressor Not Running
Compressor troubleshooting guide
AC Tripping Breaker
Electrical overload solutions
AC Thermostat Issues
Calibration and wiring problems
AC Drain Line Clogged
DIY cleaning and maintenance
AC Making Noise
Identify strange AC sounds
AC Leaking Water
Stop water damage from your AC
AC High Humidity
Dehumidification problems
AC Contactor Problems
Electrical contact diagnostics
Furnace & Heating Problems
Furnace Not Heating
Common causes and quick fixes
Furnace Won't Turn On
Troubleshoot power and ignition
Furnace Blowing Cold Air
Heat exchanger and limit switch issues
Furnace Short Cycling
Why your furnace keeps shutting off
Pilot Light Won't Stay Lit
Thermocouple and gas valve problems
Furnace Smells Like Gas
Safety steps and leak detection
Furnace Smells Burning
Identify overheating components
Furnace Making Noise
Banging, squealing, and rattling sounds
Furnace Blower Won't Stop
Fan relay and thermostat issues
Furnace Not Heating Evenly
Balance airflow between rooms
Furnace Thermostat Issues
Calibration and wiring problems
Furnace Leaking Water
Condensate drain problems
Furnace Filter Gets Dirty Fast
Air quality and ductwork issues
Furnace High Energy Bills
Efficiency troubleshooting
Emergency Services
When to Call a Professional
While many HVAC issues can be diagnosed at home, some problems require professional expertise to ensure safety and proper repair.
- Gas leaks or smell of gas near your furnace
- Electrical issues causing sparks or burning smells
- Refrigerant leaks requiring EPA-certified handling
- Complete system failures or no response
- Heat exchanger cracks or carbon monoxide concerns
Schedule a Diagnostic
Our certified technicians will thoroughly inspect your system, diagnose the problem, and provide upfront pricing before any work begins.
Need Professional HVAC Help?
When DIY troubleshooting isn't enough, Efficiency Heating & Cooling provides expert diagnosis and repair with 24/7 emergency service across the Portland metro area.