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Can you clarify about checking those two terminals on the board? When the stat is turned "off" do I want to see 24V across those terminals (C, W) or do I want to see nothing? Regarding the possibility of something being wired wrong, that isn't it as this system has been working fine, even this...

Hi - I've recently begun having issues with my Trane XR90 furnace and have discovered several similar issues spoken about across the web on various forums. The fix seems to be varied as well. Here is my situation: I first noticed the furnace would come on, heat up to almost the...