Free HVAC Tools — No Sign-Up Required

Free HVAC Tools for Homeowners

Not sure what's wrong with your heating or cooling system? Use our free tools to get answers in minutes — before you call, or to confirm it's time to call right now.

Is Your HVAC Situation an Emergency?

Know in under 60 seconds if you need to call right now

Use this HVAC emergency checklist to decide if no heat, no cooling, smells, leaks, or strange noises require immediate service.

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HVAC Symptom Checker

Select symptoms — get a diagnosis in seconds

Use this HVAC symptom checker to identify likely causes, urgency level, DIY checks, and the right service path for heating or cooling problems.

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What Sound Is Your HVAC System Making?

Click the sound type — get an instant explanation

Identify HVAC noises like hissing, grinding, banging, clicking, buzzing, and whistling. Learn likely causes and when to shut the system off.

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Should You Repair or Replace Your HVAC System?

Compare age, repair cost, efficiency, and replacement value

Use our HVAC repair or replace calculator to compare system age, repair cost, efficiency, comfort, climate demand, and replacement cost before deciding.

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Which HVAC Tool Should You Use?

Start with the tool that matches what you know right now. Each one gives a different kind of answer and points you toward the next best step.

You see symptoms

Use Symptom Checker

Best when the system is running oddly, not heating/cooling well, or showing multiple issues at once.

You hear a sound

Use Noise Identifier

Best for hissing, grinding, clicking, rattling, banging, buzzing, or whistling sounds.

Safety concern

Use Emergency Checklist

Best for no heat/cooling in extreme weather, smells, leaks, and urgent comfort issues.

Expensive repair

Use Repair or Replace

Best when deciding whether to approve a repair or compare replacement estimates.

What Can These Tools Do for You?

Understand the Problem

Know what's likely wrong before the technician arrives — so you can ask the right questions.

Know When to Act

Our tools give you a clear urgency level — emergency, urgent, schedule soon, or monitor.

Call With Confidence

Connect with a licensed local pro when you're ready — no guesswork, no pressure.

Common HVAC Questions

How do I know if my HVAC problem is an emergency?
Any situation involving a gas or burning smell, complete loss of heat when temperatures are below freezing, or no cooling during a heat wave with elderly or medically vulnerable people in your home is an emergency. Use our Emergency Checklist to get a definitive answer in under 60 seconds.
Should I repair or replace my HVAC system?
The general rule: if your system is over 15 years old and the repair cost exceeds 50% of what a new system costs, replacement usually makes more financial sense. Our Repair-or-Replace Calculator walks you through a full data-based analysis.
What does it mean when my HVAC makes a hissing or grinding noise?
A hissing sound usually indicates a refrigerant leak or air escaping a duct gap. A grinding sound typically means a motor bearing is failing. Both are urgent issues. Use our Noise Identifier for a full breakdown by sound type.
Why is my furnace running but my house isn't heating up?
The most common causes are a dirty air filter blocking airflow, a cracked heat exchanger, a failing blower motor, or a clogged condensate drain. Our Symptom Checker can help you narrow down the likely cause based on what else you're noticing.