No sure what to do about ESP Probe

Have the dreaded three blinks on my Accentra FS stove.
Have had it before, did a good cleaning including the probe and the blinks went away. Not this time. The probe is clean and so is the stove. I've shut it down, unplugged and waited to start it up again but the blinking comes back. The thing is, the stove is running fine, distribution fan comes on, temperature is accurate, the stove is running like normal except for the darn blinking.
Could it be anything else other than replacing the probe?
This is my sixth season with it and it's been great, keep it clean and it keeps me warm.
Any suggestions

jackman said:

I have the same stove and when that happens I need to clean my flu.

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Thanks Jackman, I've cleaned the flue as far as I can from the inside, guess I need to get outside and get the rest of it.