Why Your Furnace Blows Cold Air During Orillia’s Deep Freezes

December 16, 2025
Few things are more stressful during an Orillia winter than turning on the furnace… and feeling cold air coming through your vents. It happens more often than you’d think, especially during the sudden temperature drops Orillia is known for. Here are the most common causes we see: 1. The furnace overheated and shut down When airflow is restricted—usually due to a dirty filter—the furnace can overheat and trigger a safety shutdown. The fan keeps running but the heat stops. 2. Frozen vent pipes Orillia’s deep freezes often cause frost buildup in high-efficiency furnace vent pipes. When this happens, the furnace can’t ignite properly and may run without producing heat. 3. Ignition or flame sensor issues Cold temperatures make ignition components work harder. If your furnace tries to light but the flame sensor doesn’t detect heat, it will shut down for safety. 4. Low gas pressure during extreme cold During provincial cold snaps, natural gas pressure can drop slightly. Furnaces with borderline performance may fail to ignite consistently. What to Do If your furnace is blowing cold air, shut it off, check the filter, and make sure your exterior vent pipes aren’t buried in snow or ice. If everything looks normal, call Mr. Heat Furnace Orillia —we can usually diagnose the issue within minutes.

How to Prepare Your Orillia Home for a Harsh Winter (Expert HVAC Checklist)

December 11, 2025
Orillia winters can be unpredictable—one day mild, the next extremely cold. The best way to avoid emergency furnace calls is to prepare your HVAC system before the season hits its peak. Here’s a homeowner-friendly checklist used by the technicians at Mr. Heat Furnace Orillia : 1. Replace your furnace filter before the temperature drops A fresh filter improves airflow, reduces energy bills, and helps prevent overheating shutdowns. 2. Schedule a fall furnace tune-up Tune-ups catch early signs of ignition issues, blower problems, cracked hoses, and worn components—all of which commonly fail during heavy winter use. 3. Clear snow and ice from exterior vents High-efficiency furnace vent pipes can freeze easily. Keeping them clear ensures your system runs safely. 4. Test your thermostat settings Make sure your thermostat responds properly and is placed away from cold drafts. 5. Seal windows and doors Even the best furnace can’t compensate for major heat loss around windows and doorframes. Weatherstripping and caulking can drastically reduce heating costs. 6. Listen for unusual furnace sounds Banging, rattling, or grinding noises are early indicators of a mechanical failure. Why It Matters Preventative work saves Orillia homeowners hundreds of dollars in avoided breakdowns and keeps your home consistently warm through the coldest storms. If you want peace of mind this winter, Mr. Heat Furnace Orillia can perform a complete winter-readiness check to make sure your system is prepared for whatever the season brings. Contact us today for fast HVAC services !

The Most Common Furnace Repairs We See in Orillia Every Winter

December 8, 2025
Winter is our busiest season at Mr. Heat Furnace Orillia , and year after year, we see the same types of furnace failures once temperatures drop below freezing. If you’re a homeowner in Orillia, here are the issues most likely to affect you: 1. Faulty Flame Sensors Flame sensors get coated in carbon from heavy winter use, causing the furnace to shut down repeatedly. A quick cleaning usually solves the issue. 2. Blower Motor Problems When the blower motor wears out, homeowners hear grinding, humming, or squealing noises. In winter, motors work harder and failures become common. 3. Pressure Switch Failures This small but crucial part detects airflow inside your furnace. When it fails—or when vent pipes get blocked—the furnace won’t start. 4. Limit Switch Trips If your furnace overheats (often from a clogged filter), the limit switch triggers a safety shutdown. These repeated trips can eventually wear it out. 5. Thermostat Malfunctions Old thermostats often misread temperatures in cold weather, causing short cycling or heat loss. Why Winter Repairs Are More Urgent Cold temperatures make minor issues escalate quickly. A furnace working at 50% capacity in November can fail completely during January’s cold snaps. At Mr. Heat Furnace Orillia , we prioritize fast winter response, same-day repairs, and honest pricing—because no homeowner should be left without heat.
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Top 5 HVAC Questions Homeowners Ask – Answered by Mr. Heat Furnace Orillia

February 6, 2025

 At Mr. Heat Furnace Orillia, we frequently receive questions about heating and cooling systems.

As a homeowner, keeping your HVAC system running efficiently is essential for comfort and energy savings. At Mr. Heat Furnace Orillia, we frequently receive questions about heating and cooling systems. To help you stay informed, we’ve compiled answers to the five most common HVAC questions, so you know when it’s time to schedule maintenance or furnace repair in Orillia.


1. How Often Should I Service My Furnace and AC?

Regular maintenance is key to ensuring your HVAC system runs efficiently. Experts recommend servicing your furnace once a year, preferably in the fall before the cold weather sets in. Likewise, your air conditioner should be serviced annually, ideally in the spring. Routine maintenance helps prevent costly repairs and extends the lifespan of your system.


2. Why Is My Furnace Blowing Cold Air?

If your furnace is blowing cold air, there are a few possible causes:


  • Thermostat settings – Ensure the thermostat is set to "heat" and the fan is on "auto" instead of "on."
  • Dirty air filter – A clogged filter can cause airflow problems, forcing the furnace to overheat and shut off the burner.
  • Pilot light issues – If you have an older furnace, the pilot light may have gone out.


If troubleshooting doesn’t solve the problem, it’s time to call for furnace repair in Orillia to diagnose the issue.


3. How Can I Improve My Home’s Energy Efficiency

Improving your home’s energy efficiency can lower your utility bills while keeping your home comfortable. Here’s what you can do:

Replace air filters regularly – A clean filter allows your system to work efficiently.

Seal air leaks – Check for drafts around windows and doors and seal any gaps.

Upgrade to a programmable thermostat – This helps regulate temperatures automatically, reducing energy waste.

Schedule regular furnace maintenance – A well-maintained system operates more efficiently and lasts longer.


4. When Should I Replace My Furnace?

The average furnace lasts 15 to 20 years, but signs like frequent breakdowns, rising energy bills, uneven heating, or strange noises may indicate it’s time for a replacement. If repairs are becoming costly, investing in a new, energy-efficient furnace can save you money in the long run.

At Mr. Heat Furnace Orillia, we provide expert guidance on whether furnace repair Orillia is the best option or if a new furnace installation Orillia is more cost-effective.


5. What Should I Do If My HVAC System Stops Working?

If your HVAC Orillia system suddenly stops working:

  • Check the thermostat settings and batteries.
  • Inspect the circuit breaker to ensure it hasn’t tripped.
  • Replace the air filter if it’s dirty.


If your system still isn’t working, call a professional for HVAC or furnace repair in Orillia. Ignoring the problem could lead to more extensive damage.


Need Reliable Furnace Repair in Orillia? Call Mr. Heat Furnace Orillia!

Whether you need a routine tune-up, emergency repair, or a full furnace replacement, Mr. Heat Furnace Orillia is here to help. Our experienced technicians provide top-notch service to keep your home comfortable year-round. Contact us today for expert furnace repair Orillia!