Are you a homeowner in Toronto or in the GTA and your furnace is running constantly? We understand the concern, but luckily after 30+ years of serving customers we can help you solve this issue right away.
We’ll explain the most common reasons why your furnace might be running constantly, offer some troubleshooting tips, and help you decide when it’s time to call in a professional.
5 reasons why your furnace is running constantly
1. Dirty Air Filter
The most common cause of a furnace that runs constantly is luckily the easiest fix – a dirty air filter. Over time, dust, dirt, and debris accumulate in your filter, blocking airflow. As a result, your furnace has to work overtime to heat your home.
In the GTA, where furnaces can be running for 6-7 months of the year, it’s especially important to check and replace your filter regularly. A clogged filter can cause your furnace to run longer and work harder, increasing energy consumption and wear and tear.
- Pro Tip: Replace the air filter every month during the coldest months of the year in Toronto. Some higher-quality filters may last longer, but it’s always better to check more frequently during the peak of winter.
2. Blocked or Leaking Ductwork
Your furnace relies on a network of ducts to distribute warm air throughout your home. If the ductwork is blocked, dirty, or leaking, your furnace has to compensate by running longer to push enough warm air into every room. This is especially common in older GTA homes where ductwork may have been neglected.
3. Your Thermostat is not working properly
A thermostat that isn’t working properly can also cause your furnace to run constantly. If it can’t properly read your home’s temperature, it might not send accurate signals to the furnace, causing it to stay on longer than necessary.
- Pro Tip for GTA Homes: If your thermostat is outdated, consider upgrading to a smart thermostat. Toronto’s older homes can benefit from newer models that provide more precise control, helping you reduce energy costs. Smart thermostats allow remote access and adaptive learning.
4. Your Furnace is the Wrong Size
If your furnace is either too big or too small for your home, it can lead to issues like the furnace running constantly. An oversized furnace will heat the home too quickly, leading to short cycling, where the furnace turns on and off frequently. On the other hand, an undersized furnace will have to run constantly to keep up with the demand for heat.
- How This Affects GTA Homes: It’s common in homes that over the years previous owners have changed the furnace and installed the wrong size. Ensuring the correct furnace size is crucial, especially when dealing with the extreme cold of the GTA.
5. the furnace hasn’t been maintained properly
The truth is that most people don’t maintain their furnace properly. Without proper upkeep, parts can wear down, filters become clogged, and efficiency drops. In an area like the GTA, where winters are long and cold, regular furnace maintenance is critical to keeping your system in top shape.
It’s possible that there is an issue with the furnace that can’t be self-diagnosed and a professional HVAC technician should conduct an assessment.
- Pro Tip: Schedule a professional tune-up once a year, ideally before the heating season starts. This includes tasks such as cleaning, lubricating moving parts, checking for leaks, and making necessary repairs. A well-maintained furnace will run more efficiently, saving you money in the long run.
When to Call a Furnace Professional in Toronto
If your furnace is running constantly, you might be able to fix the issue yourself before calling a professional. Here are some troubleshooting tips that are particularly useful for homeowners in Toronto and the GTA:
- Check the Air Filter: As mentioned earlier, a dirty air filter is one of the most common culprits. Replace the filter if it’s dirty or clogged.
- Inspect the Thermostat: Ensure your thermostat is working properly. Try changing the batteries or resetting the system.
- Look at Your Ductwork: Check for any visible signs of blockages or leaks in your ducts. Poor airflow can keep your furnace running longer than necessary.
If you’ve tried the troubleshooting tips and your furnace is still running continuously, it’s time to call a professional. If your furnace is running constantly when it shouldn’t, this can put unnecessary strain on the system, reducing its lifespan and leading to costly repairs down the road.
If you live in Toronto or the GTA and need help with your furnace, don’t hesitate to contact us! Our licensed HVAC technicians are ready to help diagnose and fix any furnace issue. Use the button below to get in touch ASAP!
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Frequently asked furnace questions
Why is my furnace running non-stop?
Your furnace may be running constantly due to issues like a dirty air filter, a malfunctioning thermostat, or blocked ductwork. It might also be undersized for your home or in need of maintenance. Each of these factors can cause your furnace to overwork in an effort to maintain a consistent temperature.
Is it bad for a furnace to run constantly?
Yes, running your furnace constantly can put a lot of strain on the system, increasing wear and tear. This can lead to more frequent repairs, higher energy bills, and a shortened lifespan for the furnace. Regular maintenance can help prevent this.
Why is my furnace not shutting off?
If your furnace won’t turn off, the problem could be due to a thermostat that is set too high or isn’t functioning correctly. Other possible causes include blocked ducts, an airflow issue, or a problem with the furnace’s limit switch, which regulates operation.
How long is too long for a furnace to run?
A typical furnace should cycle on and off periodically, running for about 10-15 minutes at a time on average. If your furnace runs for significantly longer, especially in milder weather, it could signal an issue like a clogged filter or improper system sizing.
