Goodman GMVC960803BN Error Code EE6: Low Flame Signal
What Does Code EE6 Mean?
Error code EE6 on the Goodman GMVC960803BN indicates a low flame sense microamp signal. The furnace is still running, but the flame sensor is reading a weaker-than-expected signal from the burner flame. This code serves as an early warning before a complete ignition failure occurs.
The flame sensor is a thin metallic rod that sits in the burner flame. It works by detecting a small electrical current (measured in microamps) that passes through the flame. Over time, the sensor rod accumulates a coating of oxidation and combustion byproducts that insulates it, reducing the current it can detect. When the signal drops below the normal threshold but is still strong enough to keep the furnace running, the control module displays EE6.
If the flame sensor is not cleaned, the signal will continue to weaken until the furnace can no longer confirm a flame is present, leading to ignition retries and eventually an EE0 lockout. Other possible causes include the flame sensor being incorrectly positioned in the burner flame, a lazy or weak burner flame due to improper gas pressure, or combustion air issues.
Common Causes
When to Call a Professional
Contact a licensed HVAC technician if:
- Code EE6 returns after cleaning the flame sensor
- The burner flame appears yellow, lazy, or uneven instead of a steady blue
- The flame sensor rod appears cracked, bent, or physically damaged
- You also see other error codes alongside EE6
- The furnace begins experiencing EE0 lockouts despite cleaning
Sources
✓ Verified against manufacturer service manual — March 2026