furnace troubleshooting. 10 common issues and fixes

Published on: May 26, 2022

Furnace Troubleshooting: 10 Common Issues and Fixes

When the colder months roll around, having a functional furnace is essential for keeping your home warm and cozy. However, like any appliance, furnaces can encounter issues that require troubleshooting and repair. If you’re experiencing problems with your furnace, it’s crucial to address them promptly to avoid discomfort and potentially costly repairs. In this article, we’ll discuss 10 common furnace issues and their possible fixes to help you stay warm and cozy throughout the winter.

1. No Heat Coming from the Furnace

One of the most common issues homeowners face is a furnace that fails to produce heat. This could be due to a variety of reasons, such as a malfunctioning thermostat, a blown fuse, or a faulty pilot light. To troubleshoot this issue, start by checking the thermostat settings and ensuring the furnace is receiving power. If these steps don’t resolve the problem, it’s best to contact a professional HVAC technician like Martino HVAC for further inspection and repair.

2. Strange Noises Coming from the Furnace

If you hear unusual sounds emanating from your furnace, such as banging, rattling, or squealing, it may indicate underlying issues with the blower motor, fan, or other components. These noises could be caused by loose parts, worn-out bearings, or a malfunctioning motor. To address this problem, it’s important to schedule a maintenance check with Martino HVAC to diagnose the issue and prevent further damage.

3. Uneven Heating Throughout the Home

Uneven heating is a common issue that can result from blocked vents, dirty filters, or ductwork problems. To address this issue, start by ensuring all vents are open and unobstructed. Additionally, regularly changing your furnace’s air filter can improve airflow and distribution of heat throughout your home. If the problem persists, Martino HVAC can assess your ductwork for any leaks or blockages that may be causing uneven heating.

4. Continuous Cycling On and Off

If your furnace is constantly cycling on and off, it could be a sign of a clogged filter, a faulty thermostat, or an issue with the blower motor. To troubleshoot this problem, check and replace the air filter if necessary. If the cycling continues, contact Martino HVAC to inspect the thermostat and blower motor for any malfunctions that may be causing the issue.

5. Pilot Light Won’t Stay Lit

A pilot light that won’t stay lit could be caused by a dirty or faulty thermocouple, a gas supply issue, or a draft in the flue. Before attempting to relight the pilot light, ensure the gas valve is turned on and the area is free of drafts. If the pilot light still won’t stay lit, Martino HVAC can inspect and repair the thermocouple or address any gas supply issues that may be contributing to the problem.

6. Increased Energy Bills

If you’ve noticed a sudden spike in your energy bills, your furnace may be operating inefficiently due to dirty filters, leaky ducts, or improper airflow. Regular maintenance and filter replacements can help improve your furnace’s efficiency and reduce energy consumption. Martino HVAC offers professional maintenance services to keep your furnace running smoothly and efficiently.

7. Lack of Maintenance

Regular furnace maintenance is vital to ensure optimal performance and prevent costly repairs down the line. Martino HVAC offers comprehensive maintenance plans to keep your furnace in top condition, including regular tune-ups, filter replacements, and inspections. By scheduling routine maintenance with Martino HVAC, you can prolong the lifespan of your furnace and avoid unexpected breakdowns.

8. Faulty Thermostat

A malfunctioning thermostat can cause your furnace to behave erratically and lead to temperature inconsistencies in your home. If you suspect your thermostat is faulty, check the batteries and settings before contacting Martino HVAC for professional assistance. They can diagnose and repair any thermostat issues to restore proper functionality to your furnace.

9. Ignition Problems

Failure to ignite can prevent your furnace from producing heat and may be caused by issues with the pilot light, ignition system, or gas supply. If your furnace fails to ignite, first check the gas supply and pilot light to ensure they are functioning properly. If the problem persists, Martino HVAC can inspect the ignition system and address any malfunctions that may be preventing your furnace from igniting.

10. Short Cycling

Short cycling occurs when your furnace turns on and off rapidly, which can lead to increased wear and tear on the system. This issue may be caused by a dirty filter, improper airflow, or a malfunctioning thermostat. To troubleshoot short cycling, start by checking and replacing the air filter. If the problem persists, Martino HVAC can inspect your furnace for any underlying issues and make the necessary repairs to prevent short cycling.

In conclusion, addressing common furnace issues promptly with the help of a professional HVAC technician like Martino HVAC can ensure your furnace operates efficiently and reliably throughout the winter months. By following these troubleshooting tips and scheduling regular maintenance, you can prevent costly repairs and keep your home warm and comfortable all season long. Schedule a service with Martino HVAC in the Greater Toronto Area today for expert furnace maintenance and repair services.