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Furnace diagnostics across the GTA

No heat?
Find the cause.

A complete heating-system diagnostic for ignition, controls, airflow, venting and furnace performance—followed by a clear repair option.

24-hour service availableHeating and cooling help when your home needs it.

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Local experts, real supportServing homeowners across the GTA
High-efficiency gas furnace opened for professional diagnostic service
★★★★★
Comfort without compromiseResponsive • transparent • local
Same-day helpWhen availability allows
10+Years serving Ontario homes
24/7Emergency support
TSSARegistered contractor
ClearUpfront recommendations
Local expertise · clear next steps

Furnace repair starts with the full heating system.

A furnace that will not start, shuts down early, blows weakly or makes a new sound can have a thermostat, power, control, ignition, fuel, venting or airflow problem. The symptom alone does not identify the failed component.

Our diagnostic records the reported issue and checks the operating sequence before a repair is proposed. You receive the finding, intended repair and price for review before non-emergency work begins.

If there is a suspected gas leak, carbon-monoxide alarm, smoke or immediate safety risk, leave the affected area and contact emergency services or the utility first. Online booking is not an emergency-response substitute.

See what keeps your home cool

Good repair work starts
with the whole system.

Your air conditioner is more than the unit outside. Scroll through the system to see how each component works—and where our technicians look when comfort breaks down.

0104
Outside the home

Condenser unit

The compressor and outdoor coil release heat collected inside your home. We test electrical components, refrigerant pressures, the fan motor and coil condition before recommending a repair.

  • Warm air from vents
  • Buzzing or hard starts
  • Outdoor unit not running
Inside the cabinet

Evaporator coil + blower

The cold evaporator coil absorbs indoor heat while the blower moves conditioned air through the home. Ice, restricted airflow or a tired motor can quickly reduce comfort.

  • Frozen coil or water leaks
  • Weak airflow
  • Long cooling cycles
Across the home

Ductwork + airflow

Even healthy equipment cannot perform through leaking, restricted or poorly balanced ducts. We check temperature split, static pressure, filtration and the air path—not only the machine.

  • Hot and cold rooms
  • Noisy registers
  • High energy use
Command centre

Thermostat + controls

Your thermostat, sensors and low-voltage controls tell every component when to run. A clean diagnosis separates a control problem from an expensive equipment problem.

  • Blank or inaccurate display
  • Short cycling
  • System ignores settings
Central air conditioning system showing the outdoor condenser, indoor coil and blower, ductwork and thermostat Outdoor air intake Blower motor Conditioned air
Furnace repair · 24-hour service available

No heat?
We find the cause.

From ignition and airflow problems to safety controls and heat exchangers, our technicians diagnose the complete heating system before recommending work.

01Furnace will not startIgnition, thermostat or electrical fault
02Cold or weak airflowBlower, filter or duct restriction
03Unusual noise or smellMechanical or combustion concern
Open modern residential furnace showing the burner assembly, heat exchanger and blower motor Ignition + burners Heat exchanger Blower motor
Whole-system diagnosisSafety controls, combustion, venting and airflow checked.
Repair, not guesswork

We find the cause.
Then show you the options.

A complete diagnostic gives you a clear explanation, the repair price and honest guidance on whether the work makes sense.

01

No cooling

System running but the home stays warm—or nothing starts at all.

02

Weak airflow

Low air volume, uneven rooms or a system that never catches up.

03

Noise or leaks

New rattles, buzzing, ice, moisture or water around the equipment.

04

Short cycling

Frequent starts and stops that affect comfort and equipment life.

24-hour service available

Book a clear, professional diagnostic.

Tell us what the system is doing and choose an available service window online, or call us anytime for urgent heating and cooling help.

Book AC repair Call 1-833-700-4822
HVAC technician servicing a heat pump
Installed with careLicensed, insured professionals
The Infinite difference

Confidence at every step.

No pressure, no jargon and no mystery. You’ll understand the work, the options and the price before anything begins.

01

Advice built around your home

We consider comfort, efficiency, budget and the equipment you already own.

02

A quote you can actually compare

See products, pricing, financing and inclusions together—then choose what fits.

03

Support that stays local

Our GTA team remains available after the installation is complete.

Plan your project
Built around real life

Better comfort can also be smarter comfort.

Whether you need a quick repair or a complete home system, we’ll help you weigh operating cost, efficiency and long-term value.

  • Flexible monthly payment options
  • High-efficiency equipment choices
  • Rebate guidance where programs apply
  • Clear warranty and maintenance details
High-efficiency cold-climate heat pump system
QUIETInverter comfort
ALL SEASONHeating + cooling
Simple from here

Your comfort plan in four steps.

1

Tell us what’s happening

Book online or call. Share your goals, symptoms and preferred timing.

2

Meet your comfort advisor

We assess the space, existing system and the options that fit.

3

Choose with clarity

Review a modern quote with product, price and payment choices.

4

Relax—we handle it

Your installation is scheduled, completed and walked through carefully.

Recent Google reviews

Homeowners say it best.

Real feedback from local heating and cooling projects.

See all on Google ↗
★★★★★

See our latest customer feedback

Read current ratings and reviews directly on the Infinite Home Comfort Google Business Profile.

Open Google reviews ↗
Good questions, clear answers

Before you book.

Still deciding? Call us and a real member of our team will help.

1-833-700-4822 →
Why is my furnace running but not heating?

Possible causes include controls, ignition, fuel delivery, limit operation, airflow restrictions or a thermostat issue. A safe diagnosis requires observing the operating sequence.

Should I reset the furnace repeatedly?

No. One check of the thermostat, filter and normal power switch may be reasonable, but repeated resets can hide a fault or create risk. Arrange service when the problem returns.

Can I compare repair and replacement?

Yes. When equipment condition or repair cost makes replacement relevant, you can compare that option using the same documented system information.

Reviewed by our home-comfort team

Local experience behind every recommendation.

Infinite Home Comfort is a TSSA-registered and fully insured GTA contractor. Our website content reflects hands-on heating, cooling, hot-water and water-treatment experience and is reviewed when equipment, service or rebate information changes.

Last reviewed September 2, 2026 · Infinite Home Comfort technical team
Meet the team
Ready when you are

Let’s make home feel right.

Book a service visit or a free comfort assessment in just a few minutes.

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