Common Furnace Problems And How To Troubleshoot it
When your furnace stops working, it can be a major inconvenience, especially during the cold Canadian winters. Troubleshooting furnace problems can be a daunting task, but with the right knowledge and guidance, you can identify and potentially resolve issues on your own. In this comprehensive guide, we will walk you through the troubleshooting process, providing step-by-step instructions and helpful tips to get your furnace up and running again. Remember, safety always comes first, and if you feel uncomfortable or unsure about any step, it’s best to call a professional HVAC technician.
Basic Checks
1. Is your thermostat set to “Heat”?
The first step in troubleshooting your furnace is to check if your thermostat is set to “Heat.” It may seem obvious, but sometimes the thermostat can accidentally be switched to “Cool” or turned off completely. Ensure that the temperature setting is high enough to activate the furnace and wait for a few minutes to see if the furnace kicks in.
2. Check the thermostat batteries
If your thermostat is battery-operated, low batteries can prevent it from functioning properly. Look for any “low battery” warnings on the thermostat’s control screen. If you see this warning, replace the batteries with fresh ones.
3. Verify the furnace power switch
Locate the furnace power switch, which is usually mounted on the side of the furnace or on the wall nearby. Make sure the switch is in the “On” position. In some cases, the switch may have a fuse that needs to be checked for any signs of damage or blackening. If the fuse is damaged, replace it and turn the switch back on.
4. Check for a tripped breaker
If your furnace is still not working despite the power switch being on, check your breaker box for any tripped breakers. Look for a breaker labeled “Furnace” or “HVAC” and reset it if necessary. However, if you find that breakers are frequently tripping, it may indicate a larger electrical problem that requires professional attention.
5. Ensure the front panel door is secure
Modern furnaces have safety switches on their front panels to prevent operation if the door is not securely closed. Make sure the front panel door is properly secured and latched. Refer to your owner’s manual for specific instructions on how to secure the panel door.
Gas Furnace-Specific Checks
1. Check the pilot light
If you have a gas furnace, the pilot light plays a crucial role in igniting the burners. Ensure that the pilot light is lit. If it is not, follow the manufacturer’s instructions to relight it. If you are unsure or uncomfortable with the process, it is best to call a licensed technician for assistance.
2. Clean or replace clogged filters
Clogged filters are a common cause of furnace problems. Dirty filters restrict airflow, leading to reduced heating efficiency and potential overheating issues. Check your furnace filters and clean or replace them if necessary. It is recommended to change filters every one to three months during the heating season to maintain optimal performance.
3. Unblock vents and registers
Blocked or closed vents and registers can impede proper airflow and result in insufficient heating. Check all vents and registers throughout your home to ensure they are open and not obstructed by furniture, rugs, or curtains. Pay close attention to vents located near external walls and under windows.
4. Clear the fresh air intake
Some furnaces have fresh air intakes that can become blocked by debris, snow, or leaves. Check the intake and remove any obstructions to ensure proper airflow. If you are unsure about the location or maintenance of the fresh air intake, consult a licensed technician for guidance.
When to Call an Expert
While troubleshooting furnace problems on your own can be helpful, there are certain situations where it is best to call an expert:
- If you have followed all the troubleshooting steps and your furnace still does not work.
- If you encounter any issues that require specialized knowledge or tools.
- If you are uncomfortable or unsure about performing any troubleshooting steps.
- If you suspect a more serious underlying problem with your furnace.
Calling an expert HVAC technician ensures that your furnace is diagnosed and repaired correctly, minimizing the risk of further damage or safety hazards.
Preventive Maintenance
Regular preventive maintenance is crucial to keep your furnace running efficiently and prevent unexpected breakdowns. Here are some key maintenance tasks you can perform to keep your furnace in top shape:
- Change Filters: Regularly replace or clean your furnace filters to maintain proper airflow and prevent dust and debris buildup.
- Clean Blower and Fan Blades: Use a vacuum cleaner to remove dust and debris from the blower and fan blades to ensure optimal performance.
- Inspect Vents and Registers: Check vents and registers for obstructions and clean them if necessary to ensure even heat distribution.
- Check Chimney: If you have an older furnace that vents through a chimney, inspect it annually for cracks and damage.
- Inspect Fan Belts: Ensure that fan belts are intact and not worn out. Replace them if necessary to prevent belt failure.
- Schedule Annual Tune-up: Hire a certified HVAC technician for an annual furnace tune-up and inspection to catch any potential issues before they become major problems.
By following these preventive maintenance steps, you can extend the lifespan of your furnace and improve its overall efficiency.
Common Furnace Problems and Causes
1. Dirty filters
Dirty air filters restrict airflow and reduce furnace efficiency. Regularly changing or cleaning filters can help prevent this problem.
2. Lack of maintenance
Neglecting regular maintenance can lead to various furnace problems. Schedule annual inspections and tune-ups to keep your furnace in optimal condition.
3. Ignition issues
Pilot light problems or issues with the electric ignition can prevent the furnace from producing heat. Proper maintenance and regular cleaning can help prevent ignition problems.
4. Incorrect furnace size
An improperly sized furnace can result in inadequate heating or frequent cycling. Consult a professional technician to ensure your furnace is the right size for your home.
5. Improper installation
Shoddy installation can lead to a range of furnace problems. Hiring a certified technician for installation ensures proper setup and prevents future issues.
Furnace Repair Cost Breakdown
Understanding the potential costs of furnace repairs can help you plan and budget accordingly. Here is a rough estimate of the average prices for common furnace repairs and maintenance:
- Average hourly rate for furnace service calls: $75 – $150 per hour.
- Annual inspection, thermostat repair, flame sensor or igniter repair: $80 – $300.
- Limit switch replacement, burner repair, or gas valve replacement: $115 – $470.
- Thermostat replacement, blower fan replacement, or circuit board replacement: $125 – $650.
- Furnace motor replacement or heat exchanger replacement: $1,200 – $2,400.
These prices are approximate and may vary depending on factors such as location, furnace model, and the extent of the repair needed. It is always recommended to obtain multiple quotes from reputable HVAC contractors before making a decision.
Furnace Brand Repair Guides
For specific information on repairing different furnace brands, refer to the manufacturer’s repair guides. These guides typically provide detailed instructions and troubleshooting tips specific to each brand.
Local HVAC Repair Guides & Prices
Local HVAC repair guides and pricing information can be obtained from reputable HVAC contractors in your area. Contacting local HVAC companies and requesting quotes for specific repair services can give you a better understanding of the costs involved and the expertise available.
Remember, regular maintenance and timely repairs are key to keeping your furnace in optimal condition and ensuring your comfort during the chilly Canadian winters.
If you are looking for a furnace repair service in Toronto, Call us.
Frequently Asked Questions
1. Should I repair or replace my furnace?
The lifespan of a furnace typically ranges from 13 to 20 years. If your furnace is older than 10 years and requires significant repairs, especially to expensive components like the heat exchanger, it may be more cost-effective to replace the unit.
2. How do I know if my furnace is starting to fail?
Signs of a failing furnace include corrosion, inadequate heating, unusual noises, and delayed ignition. If you notice any of these signs, it is advisable to call a professional technician for a thorough inspection and diagnosis.
3. How do I stop my furnace from cycling irregularly?
Irregular cycling can be caused by a malfunctioning heat anticipator in the thermostat. Check the thermostat settings, clean the inside of the thermostat, and consider replacing it if necessary.
4. How do I stop my furnace from blowing cold air?
Set the fan setting on your thermostat to “Auto” instead of “On” to prevent the fan from blowing when the furnace is not in a heating cycle. Also, make sure the thermostat is set to “Heat” and that the gas valve is turned on.
5. How do I clean a dirty furnace flame sensor?
Open the access panel and locate the flame sensor, which is a small metal rod near the pilot light. Gently clean the sensor with a non-abrasive pad to remove any dust or dirt buildup.