Heater has E06 error

[AAD]

Master temp 400
Not working E06 error

 

[JamesW]

Sta rite error code

At start display shows 888 then 128 then R=5 then E06 which does not go away unless I turn off at breaker. What does this mean.

www.troublefreepool.com

 

[ajw22]

E05 & E06 Stack Flue Sensor Error