Furnace Won’t Shut Off? Steps To Take To Fix Your Furnace
It can be frustrating and worrisome when your furnace won’t shut off. A continuously running furnace increases energy bills and can signal underlying issues that may worsen if not addressed. Let’s look at common reasons for a furnace that won’t turn off and troubleshooting steps to help you resolve the issue.
Understanding Why Your Furnace Won’t Turn Off
Knowing the root cause of your furnace’s continuous operation is key to finding a solution. Here are a few common culprits:
- Thermostat Malfunctions: Your thermostat may not be reading the temperature correctly, causing the furnace to stay on.
- Blower Motor Issues: When the blower motor is stuck or malfunctioning, the furnace’s fan may continue running even when it should be off.
- Dirty Air Filters: A clogged air filter forces the system to work harder to circulate air, potentially causing it to stay on longer than needed.
Troubleshooting Steps To Diagnose the Problem
If you’re comfortable performing basic troubleshooting, try these steps to see if they help resolve your furnace issue.
- Check Thermostat Settings and Wiring
- Set your thermostat to “Auto” mode instead of “On.” This will ensure that the furnace only runs when necessary to reach the set temperature.
- If you suspect a connection issue, inspect the thermostat wiring. Loose or damaged wires could be disrupting proper function, and you’ll need to call a professional for repairs.
- Inspect the Blower Relay and Motor
- The blower relay controls the fan’s operation; if it’s malfunctioning, the fan may stay on indefinitely.
- Checking the blower motor may require removing the cover and inspecting it for signs of wear. If in doubt, contact an HVAC professional.
- Replace Dirty or Clogged Air Filters
- A dirty air filter restricts airflow, often causing the furnace to overwork. Replace it with a clean filter to ensure proper air circulation.
When To Call a Professional HVAC Technician
While some furnace issues can be resolved with troubleshooting, there are situations where professional help is essential. If you notice any of these signs, it’s time to call an HVAC technician:
- The furnace still runs nonstop after checking all basic troubleshooting steps.
- There are unusual sounds, smells, or visible damage to furnace components.
- You feel uncomfortable or unsure about inspecting certain parts of your system.
Professional technicians can accurately diagnose and repair complex furnace issues, ensuring your home remains safe and comfortable.
Preventative Measures To Avoid Future Furnace Issues
Once your furnace is back to normal operation, consider these preventative steps to keep it running smoothly:
- Regular Maintenance and Inspections: Schedule routine furnace maintenance to catch potential issues early and keep the system running efficiently.
- Upgrade to a Programmable Thermostat: This upgrade can help regulate temperature and reduce energy usage, reducing strain on your furnace.
- Ensure Proper Airflow and Ductwork Condition: Clean filters and unobstructed vents ensure efficient operation, preventing overheating and excessive wear.
By quickly addressing a continuously running furnace and following preventative practices, you can extend your furnace’s lifespan and improve home comfort. If your furnace won’t shut off and you’re unsure what to do, SM Air’s expert HVAC technicians are here to help with repair, maintenance, or replacement options to get your furnace back on track.
Reach out to our friendly team today to schedule furnace repair, replacement, or maintenance!