Harman Accentra Insert 3 blink status

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pfmaloney

Member
Nov 10, 2010
95
Southeastern PA
Hi,
I have an older accentra insert. After plugging it in for the first time this season in the Off position, the blowers started up and the status went into the 3 blink mode. When I shut it down in the spring, I did a full end of season cleaning including the flue. I checked all of the connections and could not get past the 3 blink status.
After researching several threads in the forum, I replaced both the ESP and room temp probes with no luck. The ESP I bought is red which matched the original.

Before I replace the control board, I was curious if I should try something else first?

Thanks
...Pat