How do I change heating temperature range limits on the Honeywell FocusPro TH5220D?
In Installer Setup mode, navigate to function number 27. Here you can set maximum heat setting up to 90°F (32°C). Lower settings such as 40 °F - 89 °F also available.
From the official Honeywell Focuspro Th5220d manual, page 6
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