Originally Posted by anav8or
Remove the outside access panel and you'll see the control board mounted on the wall on the left side next to the blower. The board itself is mounted on a piece of metal and slides out.
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That is, if you have an outside access door. They are building these things now with no access door, at least some of them. I ran into this with a brand new rig, and a bad control board, and no access. Fortunately it was under warranty because a 20 minute board switch out became a good 4 hour job of cutting an access hole through our front basement wall. Would have been some bill if I had to pay for it.