The furnace reports a weak or improper flame-sensor signal, although normal operation may continue.
Professional Required
Weak flame or improper flame sensor signal
Normal furnace operation continues but LED displays EE6
Flame sensor coated/oxidized or misaligned; lazy burner flame due to improper gas pressure or combustion air
Arrange service to inspect the flame sensor, burner flame and combustion conditions. Do not adjust gas pressure or burner components yourself.
Flame sensor, gas pressure system, combustion air system
Contact a qualified HVAC technician for diagnosis and repair; do not bypass safety devices or attempt internal gas or electrical repairs.
If you smell gas, leave the area and contact your gas utility or emergency services from a safe location. Never bypass safety controls. Internal furnace servicing should be performed by qualified personnel.
Learn more about the furnace components and operating conditions commonly associated with diagnostic error codes: