Furnace Not Heating? How to Troubleshoot Common Heating Issues

When winter temperatures drop in Calgary, the last thing you want is a furnace that isn’t keeping your home warm. If you’re facing the frustrating problem of your furnace not heating, it’s important to act quickly to restore comfort to your home. At ProStar Plumbing & Heating, we understand the urgency of heating issues, and we’re here to help with expert advice and solutions. Here are tips on troubleshooting common heating problems and understanding when it’s time to call in the pros – we are here for you 24/7!

Common Reasons Your Furnace Is Not Heating

When your furnace isn’t heating, the cause can range from simple fixes to more complex problems. Here are some of the most common reasons homeowners face heating issues:

1. Thermostat Issues

One of the first things to check when your furnace isn’t heating is the thermostat.

• Ensure the thermostat is set to “heat” mode and not “cool” or “off.”
• Check that the temperature is set higher than the current room temperature.
• If your thermostat runs on batteries, replace them to see if that resolves the issue.

Sometimes, the problem is as simple as a faulty or improperly programmed thermostat.

2. Clogged Air Filters

A dirty air filter can restrict airflow, causing your furnace to overheat and shut down as a safety precaution.

• Inspect the air filter and replace it if it’s clogged with dust or debris.
• Regularly replacing your filter (every 1-3 months) improves airflow and helps your furnace run efficiently.

A clean filter is often the solution to a furnace not heating issue and prevents bigger problems down the road.

3. Pilot Light or Ignition Problems

If you have an older gas furnace, the pilot light may have gone out, preventing the furnace from heating. For modern furnaces, ignition systems can fail due to wear and tear.

• Check to see if the pilot light is lit. If it’s out, relight it following the manufacturer’s instructions.
• For electronic ignitions, listen for clicking sounds, which may indicate an ignition failure.

If you suspect ignition problems, it’s best to call a professional technician to safely address the issue.

4. Blocked or Leaking Air Ducts

Blocked or leaking ducts can result in uneven heating or prevent warm air from reaching certain rooms.

• Inspect vents and registers to ensure furniture, rugs, or other obstructions do not block them.
• Check for visible damage or leaks in exposed ductwork.

Improper ductwork can cause your furnace to run but not properly heat your home, requiring professional repair.

5. Tripped Circuit Breaker or Blown Fuse

If your furnace won’t turn on at all, check your home’s electrical panel. Look for a tripped breaker or blown fuse and reset or replace it as necessary.

If the breaker continues to trip, this could indicate a bigger electrical issue that needs professional attention.

6. Furnace is Not Getting Power

Ensure the furnace switch (located near the unit) is turned on. If the switch or power supply is off, the furnace will fail to heat.

When to Call a Professional for Furnace Repairs

While basic troubleshooting can sometimes resolve minor issues, certain furnace problems require professional expertise. Call our team if:

• Your furnace continues to run without producing heat.
• You hear unusual noises, such as banging, whistling, or rattling.
• The furnace frequently cycles on and off.
• Your energy bills have increased without explanation.
• You notice a yellow pilot light flame (indicating a potential gas leak or carbon monoxide issue).

Our skilled technicians have the tools and experience to diagnose and repair complex furnace issues quickly and safely.

Prevent Future Heating Problems with Regular Maintenance

The best way to avoid a furnace not heating scenario is through regular furnace maintenance. At ProStar Plumbing & Heating, we offer comprehensive furnace tune-ups to keep your heating system running efficiently all winter long. Routine maintenance helps prevent unexpected breakdowns, improves energy efficiency, and extends the lifespan of your furnace.

Get Your Furnace Heating Again with ProStar Plumbing & Heating

If your furnace is not heating and you need fast, reliable service in Calgary, ProStar Plumbing & Heating is here to help. Our expert technicians will diagnose the problem, provide an upfront quote, and get your furnace back to full operation as quickly as possible.

Don’t let a cold home disrupt your comfort—contact us today to schedule a furnace inspection, repair, or maintenance. We’re here to ensure your home stays warm and cozy all winter long!