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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Air Conditioning in Orillia: What I’ve Learned on the Job

May 8, 2025

By a Local HVAC Tech at Mr. Heat Furnace Orillia

air conditioner repair orillia

Hey folks,

I’m one of the techs over at Mr. Heat Furnace Orillia, and if there’s one thing I’ve learned after years in the HVAC business, it’s this: nothing beats a well-running air conditioner when that Orillia summer heat kicks in.

You wouldn’t think we get that hot up here, but trust me—when July rolls around and the humidity rises off Lake Couchiching, homeowners want one thing: cold air, and lots of it.


Installing Air Conditioners in Orillia Homes

Every house is a little different, and I’ve worked on everything from older character homes in the North Ward to newer builds in West Ridge. Some need a full central air install, while others just need a ductless mini-split system. Whatever the case, I always take time to check things like insulation, ductwork condition, and how the home is used—because proper sizing and placement can make a world of difference.

You’d be surprised how many people think “bigger is better” when it comes to A/C units. Truth is, an oversized unit cycles too quickly and doesn’t remove humidity properly. I always say: Let the system do the job it was built to do—slow, steady, and efficient.


Repairing Air Conditioners: What I See Most Often

Most of the service calls I get for air conditioning repair in Orillia come down to one of three things:

  • Dirty filters or coils (easy fix, but often overlooked)
  • Refrigerant leaks (a sign your system might be aging or wasn’t installed properly)
  • Electrical issues like blown capacitors or faulty contactors

If your system is blowing warm air, running non-stop, or making odd noises, don’t wait. The longer you let it go, the more expensive it can get.

And if your A/C is over 10-15 years old and repairs are adding up? I’ll give it to you straight—sometimes it’s just smarter to replace it with something more efficient. We’ll always walk you through the options so you’re not in the dark.


Why It Matters

You don’t just install an A/C to cool the house—you do it to keep your family comfortable, protect your indoor air quality, and cut down on stress during heat waves. I’ve seen a lot of Orillia summers, and I’ve seen what happens when systems aren’t maintained or installed right.

At the end of the day, I take pride in making sure your system is done right the first time. No shortcuts. No guesswork. Just honest, local service from someone who knows the area and cares about your comfort.


Need Help with Your A/C in Orillia?

If you're in Orillia and need air conditioning repair or installation, give us a call at Mr. Heat Furnace Orillia. We’ll keep your cool air flowing and your home running smooth all summer long.

Stay cool out there,


 – Your friendly HVAC tech at Mr. Heat