Furnace Short Cycling
Furnace keeps turning on and off? This wastes energy and could damage your system.
Common Symptoms
If you're experiencing any of these symptoms, you may have this problem:
Possible Causes & Solutions
Dirty Air Filter
DIY PossibleReplace the air filter
Overheating
Pro RequiredProfessional inspection for airflow issues
Faulty Flame Sensor
Pro RequiredSensor cleaning or replacement
Thermostat Problems
Pro RequiredThermostat repair or replacement
Oversized Furnace
Pro RequiredProfessional assessment needed
When to Call a Professional
While some issues have DIY solutions, HVAC systems are complex. Call a professional when:
- DIY solutions don't resolve the problem
- The issue involves electrical components
- You smell gas or burning odors
- The problem returns after temporary fixes
- Your system is under warranty (DIY repairs may void it)
Frequently Asked Questions
Why won't my furnace turn on?
Common causes include a tripped circuit breaker, thermostat issues, pilot light problems, or a faulty ignition system. We can diagnose all furnace issues.
My furnace is making strange noises. What does it mean?
Different noises indicate different issues: banging may mean delayed ignition, squealing could be a belt issue, and rumbling might indicate a burner problem.
How often should I change my furnace filter?
Standard filters should be changed every 1-3 months depending on usage, pets, and allergies. Higher-quality filters may last longer but check monthly.
Is a cracked heat exchanger dangerous?
Yes, a cracked heat exchanger can leak carbon monoxide, which is dangerous. If suspected, turn off your furnace immediately and call for service.
Related Problems
No Heat
Furnace running but no heat? Or not running at all? Find the cause and solution here.
Won't Ignite
Furnace trying to start but won't ignite? This is a common issue with several possible causes.
Noisy Furnace
Strange sounds from your furnace? Learn what different noises mean and when to call for help.