Common Causes and Fixes
A furnace that repeatedly turns off before fully heating your home can be frustrating, especially during cold Ohio winters. If you’ve been wondering, “why does my furnace keep turning off?”, you’re not alone. This issue, known as short cycling, can reduce your furnace’s efficiency, increase your energy bills, and lead to costly repairs if left unchecked. In this guide, we’ll go over the most common causes of a furnace shutting off unexpectedly and what you can do to fix it.
6 Reasons Your Furnace Keeps Turning Off
1. Dirty Air Filter
One of the most common reasons for short cycling is a clogged air filter. A dirty filter restricts airflow, causing the furnace to overheat and shut off as a safety measure. Replacing the air filter every 1-3 months can help prevent this issue and keep your furnace running smoothly.
2. Thermostat Issues
A malfunctioning thermostat can cause your furnace to turn off too soon or fail to maintain the set temperature. Check that your thermostat is placed away from heat sources and direct sunlight. If the issue persists, calibrating or replacing the thermostat may be necessary.
3. Flame Sensor Problems
The flame sensor ensures the burners stay lit while your furnace is running. If the sensor is dirty or faulty, it may incorrectly detect no flame and shut off the system. Cleaning or replacing the flame sensor is often the solution.
4. Blocked or Closed Vents
If too many air vents in your home are closed or blocked, your furnace may struggle to distribute heat properly, causing it to overheat and shut off. Ensure that all vents are open and unobstructed to allow proper airflow.
5. Overheating Furnace
An overheating furnace will shut itself off as a safety precaution. This can be caused by dirty coils, blocked airflow, or mechanical failure. Regular furnace maintenance can help prevent overheating and extend the life of your system.
6. Improper Furnace Size
If your furnace is too large for your home, it may heat the space too quickly and shut off before completing a full cycle. On the other hand, an undersized furnace may struggle to meet your heating demands, leading to excessive cycling. A professional HVAC technician can assess your system and recommend the right size furnace for your home.
How to Fix a Furnace That Keeps Turning Off
If you’re dealing with a furnace that won’t stay on, here are some troubleshooting steps:
- Replace the air filter to improve airflow.
- Check the thermostat settings and replace batteries if needed.
- Inspect the vents to ensure they’re open and unobstructed.
- Clean the flame sensor if the furnace shuts off quickly after ignition.
- Schedule professional maintenance if the issue persists.
Professional Furnace Repair in Ohio
If your furnace keeps turning off and simple troubleshooting hasn’t fixed the problem, it may be time to call a professional. At Lochard HVAC, Plumbing, and Service, we provide expert furnace repair, maintenance, and installation in Piqua, Troy, Sidney, Bellefontaine, Celina, Tipp City, and surrounding areas. Our experienced technicians can diagnose the issue and get your system running efficiently again.
Get Your Furnace Running Smoothly Again
Don’t let a malfunctioning furnace leave you in the cold. Contact Lochard HVAC, Plumbing, and Service for expert furnace repair and maintenance today. Regular service can help prevent costly breakdowns and ensure your home stays warm all winter long.
FAQs
How do I know if my thermostat is bad?
If your thermostat is bad, you might notice inconsistent temperatures, frequent short cycling, or an unresponsive display. Other signs include your furnace not turning on or the thermostat failing to hold the set temperature. Try replacing the batteries or recalibrating the thermostat. If the problem persists, it may be time for a thermostat replacement.
How expensive is a new furnace?
The cost of a new furnace depends on factors like the size of your home, the type of furnace, and installation costs. On average, a new gas furnace installation can range from $3,000 to $7,500, while high-efficiency models may cost more. To get an accurate estimate, schedule a consultation with Lochard HVAC, Plumbing, and Service for a furnace installation quote in Piqua, Troy, Sidney, Bellefontaine, Celina, Wapakoneta, and nearby areas.
How to tell if a flue pipe is clogged?
A clogged furnace flue pipe can lead to poor heating performance, increased carbon monoxide levels, and dangerous backdrafting. Signs of a blockage include soot buildup, rust around the flue, condensation issues, or a strong gas smell. If you suspect a flue blockage, it’s essential to call an HVAC professional immediately for an inspection.
How do you tell if you need a new thermostat?
You may need a new thermostat if you notice incorrect temperature readings, difficulty adjusting the settings, or if your HVAC system isn’t responding properly. Older thermostats can also struggle with efficiency, so upgrading to a programmable or smart thermostat can improve your home’s heating and cooling performance.
How do I reset a thermostat?
To reset your thermostat, follow these steps:
- Turn off your HVAC system at the thermostat and breaker.
- Remove the thermostat batteries (if applicable) and wait about 30 seconds.
- Restore power and turn your HVAC system back on.
- Reprogram the thermostat settings as needed.
If your thermostat still isn’t functioning correctly, it may need recalibration or replacement.
