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Serving Courtenay, BC and Surrounding Areas

After Hours Service Available


Serving Courtenay, BC and Surrounding Areas


Temprite Climate Solutions Blog

Your Gas Furnace Doesn’t Stay On—Here’s Why Might Be Happening


Winters are in full swing, and the last thing you want is your gas furnace in Cumberland, BC acting up. If you’ve noticed that your furnace doesn’t stay on for as long as it should, there could be various reasons behind this issue. It’s crucial to diagnose and address these issues promptly. Let’s dive into some potential culprits that might be causing your gas furnace to turn off prematurely.

1. Thermostat Issues

The thermostat serves as the commander-in-chief of your heating system. If it’s experiencing glitches, it might be sending incorrect signals to your furnace, leading to untimely shutdowns. Check the thermostat settings, replace batteries if necessary, and ensure it’s functioning correctly.

2. Dirty or Clogged Filters

Airflow is the lifeblood of your furnace’s operation. Dirty or clogged filters can restrict airflow, causing the system to overheat. Most furnaces have safety mechanisms that trigger a shutdown when overheating is detected. Regularly replace or clean your filters to maintain optimal airflow.

3. Pilot Light Problems

The pilot light is a small flame that ignites the gas burner. If it goes out or is faulty, your furnace will likely shut down. Check for issues with the pilot light, such as blockages or a malfunctioning thermocouple, and address them promptly.

4. Faulty Flame Sensor

The flame sensor is responsible for detecting the burner’s flame. A malfunctioning sensor may not register the flame, causing the furnace to shut down as a safety precaution. Clean or replace the flame sensor as part of your troubleshooting process.

5. Gas Supply Issues

A steady gas supply is vital for your furnace to operate efficiently. Problems with the gas valve or issues in the main gas line can lead to shutdowns. Conduct a thorough check of the gas supply system and address any issues promptly.

6. Limit Switch Problems

The limit switch is a crucial component that regulates the blower. If it malfunctions, the blower might not operate correctly, leading to overheating and a subsequent shutdown. Inspect the limit switch and replace it if necessary.

7. Air Duct Issues

Blocked or leaky air ducts can disrupt the airflow in your heating system, causing the furnace to overheat. Regularly check and clean your air ducts to ensure proper ventilation and prevent unexpected shutdowns.

8. Overheating

Various factors, including a malfunctioning blower motor or restricted airflow, can lead to overheating. If your furnace is consistently shutting down due to overheating, investigate the root cause and address it promptly.

9. Electronic Ignition Problems

For furnaces with electronic ignition systems, issues with the ignition can lead to shutdowns. Inspect the electronic ignition components and replace any faulty parts to ensure smooth operation.

If you’ve identified any issues with your gas furnace or suspect that something might be amiss, it’s crucial to resist the temptation of DIY repairs. Gas furnaces involve complex systems and potential safety hazards, and attempting to fix problems without the right knowledge can lead to further complications. Instead, reach out to our experienced HVAC professionals who have the expertise to diagnose and address issues—safely and accurately!

Temprite Climate Solutions serves Courtenay, BC and the surrounding areas. For a job done right, call Temprite!

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