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Top 5 Signs Your Furnace Needs Repair — And When to Call a Professional in London, Ontario

November 03, 20252 min read

“Top 5 Signs Your Furnace Needs Repair — And When to Call a Professional in London, Ontario”

Top 5 Signs Your Furnace Needs Repair - And When to Call a Professional in London, Ontario

When winter hits London, Ontario, the last thing you want is a broken furnace. Your heating system works hard to keep your home warm and comfortable, but over time, even the best furnaces show signs of wear. Recognizing early warning signals can help prevent costly breakdowns and ensure your system runs efficiently all season long.

8 Reasons

Here are five telltale signs your furnace needs professional attention — and how MB Appliance & HVAC Services can help you stay cozy year-round.

1. Inconsistent or Weak Heating

If certain rooms in your home feel colder than others, or your furnace blows lukewarm air, it could indicate a clogged filter, duct issues, or a failing motor. Uneven heating often points to a system struggling to distribute air efficiently.

2. Strange Noises Coming from the Furnace

Banging, rattling, or screeching sounds aren’t normal. These noises may signal loose components, worn-out belts, or ignition problems. Ignoring them can lead to more extensive damage and costly repairs down the line.

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3. Rising Energy Bills

If your utility bills are increasing but your usage hasn’t changed, your furnace may be running inefficiently. A professional inspection can identify issues like dirty filters or failing parts that cause your system to overwork.

4. Frequent Cycling or Difficulty Starting

A furnace that turns on and off too often or struggles to start may have a faulty thermostat, dirty sensors, or electrical issues. These problems affect both efficiency and comfort.

5. Unusual Odors or Poor Air Quality

Musty or burning smells can indicate clogged vents or even a dangerous gas leak. If you ever smell gas, shut down your furnace immediately and call a technician right away.

3 Expert Tips to Keep Your Furnace in Top Shape

  1. Schedule Annual Maintenance: Regular tune-ups catch small issues before they become big problems.

  2. Change Filters Frequently: Replace air filters every 1–3 months to improve airflow and air quality.

  3. Listen and Observe: Don’t ignore new sounds or changes in performance — they’re early warning signs.

Conclusion & Call to Action

Your furnace plays a vital role in keeping your family safe and comfortable during London’s cold months. Don’t wait for a total breakdown before taking action.

Contact MB Appliance & HVAC Services today for fast, reliable furnace repair and maintenance. Our local experts are ready to restore your comfort — with honest pricing and quality service you can trust.

Book your furnace service today atwww.mbappliancehvacservices.com

About MB Appliance & HVAC Services
MB Appliance & HVAC Services is a trusted, locally owned company serving London, Ontario, and surrounding towns within 75 km. With over 30 years of hands-on experience, we specialize in reliable appliance repairs and HVAC services that keep homes running smoothly. From fridges and dryers to furnaces and air conditioners, we fix it right the first time — with honesty, craftsmanship, and care.

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