Goodman Error Code E6 indicates Weak flame (flame-sense micro-amp signal is low). Start by checking the most common and safe items identified in the troubleshooting section. If the code returns after those checks, professional diagnosis is recommended.
Easy
Weak flame (flame-sense micro-amp signal is low)
Normal furnace operation continues, but LED displays E6; thermostat may show “Check Furnace”
Flame sensor coated/oxidized; flame sensor incorrectly positioned; lazy burner flame due to improper gas pressure or combustion air
Sand flame sensor if coated or oxidized; inspect flame sensor alignment; check inlet air piping for blockage and proper termination; compare gas pressure to rating plate and adjust; turn power off before repair
Flame sensor, inlet air piping, gas pressure system
Call an HVAC technician if the error persists after completing the recommended basic troubleshooting steps or if the system repeatedly locks out.
Disconnect power before inspecting the equipment. Never bypass safety devices or operate the system if you suspect unsafe conditions.
Learn more about the furnace components and operating conditions commonly associated with diagnostic error codes: