How to Test Furnace Ignition or Burner Flame Color in Minnesota Homes
Step 1: Checking the Furnace Ignition
There are two main ignition systems you may encounter:
- Pilot Light Ignition (Older Furnaces):
- Look for a small blue flame that stays steady.
- If the pilot goes out frequently, it could be a dirty sensor, draft issue, or failing thermocouple.
- Electronic Ignition (Modern Furnaces):
- These include hot surface ignitors or spark ignitors.
- If your furnace fails to light after a few tries, you may hear clicks but no flame—this usually points to a faulty ignitor, dirty burners, or gas flow issues.
⚠️ Warning: Never try to repair ignition parts without training. They involve gas and electrical systems—leave repairs to licensed Minnesota HVAC pros.
Step 2: Checking Burner Flame ColorThe flame color is a big indicator of efficiency and safety:
- 🔵 Blue Flame (Steady): Normal. Indicates proper gas combustion.
- 🔵+ Yellow Tip: Small flicker of yellow at the tip can be okay, but watch for changes.
- 🟡 Yellow/Orange Flame: This signals incomplete combustion. It could mean dirty burners or a serious issue like carbon monoxide risk.
- 🔥 Unsteady Flame: If flames are wavering or lifting, it may mean poor airflow or venting issues.
Why This is Crucial in Minnesota
In tightly sealed Minnesota homes, improper furnace combustion can quickly become a safety issue—particularly with carbon monoxide. That’s why the Minnesota Department of Labor and Industry stresses having a licensed HVAC contractor evaluate irregular flame color or ignition failures.
When to Call Air Comfort
- Furnace doesn’t ignite consistently
- Pilot light won’t stay lit
- Burner flames are yellow/orange
- You notice soot buildup around the furnace
Our technicians diagnose ignition and combustion issues safely and get your system back to running efficiently—all while keeping your family safe.
📞 Call Air Comfort today at (763) 753-6623 to schedule your furnace inspection.