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Bison,

I spent much of yesterday stressing over this tstat. I traced the blk, orange and brown (which I forgot) back to the furnace and found that they aren't used at all. I believe the blue is...

I have read several postings on here about this subject, but have not really found the answer to my problem. I am having similar trouble with my relatively new RTH230B Thermostat (Mainly the A/C...