dougrainer wrote:
From your post, it seems you have 2 controls now for the fan motor----The Dino board and the original fan relay which should have been removed when you install a upgraded Fan control module board. I don't understand WHY you left the Fan relay in place when you went to the Dino board.
I *think* I may have figured it out. I *think* the spark is jumping to the remote sense terminal which isn't even used by the dino board. This is getting back to the t-stat, which is momentarily flaking out on making the connection (I can hear it happening). This shuts down power to the relay, which (once the t-stat is back on) is still letting power through to let the fan purge. But it can't because the board isn't letting power through...
I've just chopped the remote sense line, I'll let you know how it goes.
