E10 Error - Frigidaire Front Loading Washer

[KJCMaintenance]

Frigidaire GLTF2940ES0 Washer

Hi All,
Now that the door switch is replaced, I am getting the tub to spin properly. 

Now if I can only find the cause of the intermittant E10 error.  I only get it occasionally and with no regularity.  I've done the basics and checked the pump, cleaned the "door-boot-filter" and collection boot in front of the pump.  We don't have fantastic water pressure due to our well, but the washer has been working fine for the last 5 year.  Does anyone have any additional ideas?

Thanks again,
Chris

[JWWebster]

Are you using just a tiny amount of soap? The right soap?