Honeywell TH5220D1003 Support Question
Find answers below for this question about Honeywell TH5220D1003 - Digital Thermostat, 2h.Need a Honeywell TH5220D1003 manual? We have 1 online manual for this item!
Question posted by lorenzokimber on February 10th, 2014
How Do I Swap Out A Th5220d1003 With A Rth221b1021?
I currently have a TH5220D1003 installed in my house that is believed to be faulty. Therefore I bought a RTH221B1021 in hopes of switching it out. Is this possible and can anyone explain the wiring schemes? There are some differences between the two.
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