No Heat? What to Check Before Calling for Furnace Repair

A furnace may stop producing heat because of a simple issue you can identify yourself or a larger problem that requires professional repair. The checks below can help you rule out some common causes and determine when it is time to call Norm’s.

If your furnace still will not start, repeatedly shuts off, blows cold air, or shows other signs of a larger problem, Norm’s Plumbing, Heating and Air Conditioning provides furnace repair throughout Nanaimo, Lantzville, Parksville, Qualicum Beach, Ladysmith, and surrounding Mid-Vancouver Island communities.

What to Check When Your Furnace Is Not Working

1. Check Your Thermostat

Thermostat issues are one of the most common reasons homeowners lose heat.

Make sure:

• The thermostat is set to HEAT
• The temperature is set higher than the current room temperature
• The fan is set to AUTO
• The display is functioning properly
• The batteries have been replaced, if applicable

If you recently experienced a power outage, your thermostat settings may need to be reset.

2. Check the Furnace Power Switch

Most furnaces have a dedicated power switch that looks similar to a standard light switch. It can sometimes be accidentally turned off during cleaning, storage, or other routine activities around the furnace.

Make sure the switch is in the ON position and check for indicator lights on the unit.

3. Check Your Electrical Panel

A tripped breaker may be preventing your furnace from operating.

Check your electrical panel for:

• A breaker in the OFF position
  A breaker sitting between the ON and OFF positions

If the breaker trips again after being reset, it is time to call a professional.

4. Replace a Dirty Furnace Filter

A clogged furnace filter can restrict airflow and cause your furnace to overheat or shut down as a safety precaution.

Signs of a dirty filter include:

• Weak airflow from the vents
• Uneven temperatures throughout the home
• Increased energy bills
• More frequent furnace cycling

As a family-owned company serving Mid-Vancouver Island, Norm’s has seen plenty of no-heat calls that were resolved with a simple filter replacement.

5. Make Sure Your Vents Are Open

Walk through your home and check that:

• Supply vents are open and unobstructed
• Return-air vents are clear
• Furniture is not blocking airflow
• Rugs or curtains are not covering registers

Restricted airflow can prevent your heating system from operating efficiently.

6. Check the Gas Supply

If you have a gas furnace, verify that other gas appliances are working properly.

Make sure:

• The gas shutoff valve is open
• There are no known service interruptions

If you smell gas, leave the area immediately and contact your gas provider. Do not attempt any further troubleshooting.

7. Check the Exterior Vents

High-efficiency furnaces often vent outdoors through PVC pipes.

Check the exterior vents for:

• Leaves and debris
• Bird nests
• Snow or ice buildup

A blocked vent can cause the furnace to shut down as a safety measure.

8. Look for Furnace Error Codes

Many modern furnaces have diagnostic lights or digital displays that show fault codes.

If you notice flashing lights or an error code:

• Write down the code
• Take a photo, if possible
• Share it with your technician when you call

Experienced technicians, including Norm’s licensed gas specialists, can often use these codes to diagnose the issue more quickly.

When Should You Call for Furnace Repair?

If you have completed these checks and still do not have heat, it is time to call a professional. You should schedule furnace repair if:

• The furnace will not start
• The system repeatedly shuts off
• The breaker repeatedly trips
• You hear unusual noises
• Your home is not reaching the desired temperature
• You smell burning odours
• The furnace is blowing cold air

At Norm’s, our technicians take the time to properly diagnose the issue and explain your options clearly. If it is a simple repair, we will tell you. If there is a larger issue with the system, we will help you understand the best path forward.

How Can Furnace Maintenance Help Prevent Breakdowns?

Many furnace failures can be prevented with regular maintenance. Routine inspections can help identify worn components, dirty filters, airflow issues, and other small problems before they turn into expensive repairs or a complete loss of heat.

Technical Safety BC recommends annual servicing for home heating equipment to help it operate safely and efficiently.

Norm’s offers monthly HVAC Membership Plans designed to help Mid-Vancouver Island homeowners enjoy greater reliability, better energy efficiency, and peace of mind throughout the year.

Eligible residential FortisBC gas customers may also qualify for a $50 furnace or boiler maintenance rebate when the equipment is serviced by a licensed gas contractor.

Call Norm’s for Furnace Repair

Norm’s is a family-owned and operated company serving Nanaimo, Parksville, Qualicum Beach, Ladysmith, Lantzville, and surrounding communities. We are committed to treating your home like it is our own.

Whether you need furnace repair, seasonal maintenance, or advice from experienced gas technicians like Don and the rest of the Norm’s team, we are here to help.

No heat? Call Norm’s Plumbing, Heating and Air Conditioning at 250-753-3641 or schedule an assessment. From our family to yours, we will help get your home warm and comfortable again.