Furnace Not Working? Here’s What to Check Before You Call

Emily Low | Apr 23 2026 14:00

Waking up to a cold house is the worst—especially in the middle of a Michigan winter.

If your furnace isn’t working, don’t panic. There are a few simple things you can check before calling for service.


🌡️ 1. Check Your Thermostat

Make sure:

  • It’s set to “heat”
  • The temperature is set higher than the room temp
  • Batteries aren’t dead

👉 This is more common than you’d think!


🧼 2. Look at Your Air Filter

A clogged filter can cause your system to overheat and shut down.

Signs:

  • Weak airflow
  • System turning on and off frequently

💡 Replace your filter if it’s dirty—it can fix the issue instantly.


⚡ 3. Check the Breaker

Your furnace may have tripped the breaker.

  • Locate your electrical panel
  • Look for a flipped switch
  • Reset it if needed

🔥 4. Pilot Light or Ignition Issue

If you have an older furnace, the pilot light may be out.

Newer systems use electronic ignition, which can also fail.

 

👉 If you’re unsure—this is a good time to call a pro.


🚨 When to Call for Help

If your furnace still isn’t working, it could be:

  • A faulty blower motor
  • Ignition system failure
  • Worn-out components

📍 Furnace Repair in Monroe, MI

Don’t sit in the cold—our team is here to help.

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📞 Call today to get your heat back on.