Honeywell provides a link to download the owner's manual for the RTH2310B programmable thermostat on its website, YourHome.Honeywell.com, as of 2015. Users can download the manual for free in PDF format.
Find the owner's manual for the RTH2310B programmable thermostat by navigating to YourHome.Honewell.com and clicking Find Your Owner's Manual under the Support heading. Enter "RTH2310B" in the Enter Your Model Number field, then click the Search icon. A link to download the owner's manual is displayed on the next page. The manual is available in English and Spanish.
Honeywell also shares frequently asked questions for the RTH2310B, as well as installation videos and product information videos.