The LCD screen of my Honeywell CMS927 thermostat mostly stopped working.
See here how I fixed the display using a toaster.
(Also applies to the CM927 - the S indicates it was sold with the receiver. The 921 is the 1 day rather than 7 day version.)
The site for user manuals:
heatingcontrols.honeywellhome...
I have another video with the background music removed here: • Honeywell LCD fail and...
Inspiration from:
• Honeywell cm901 Thermo...
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