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The latest household programming bug


USNRET

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Standard issue Honeywell thermostat. Just switched from off to cool and programmed a temp of 77 with a permanent hold (no other programming times, days, temps, etc). Woke you Friday freezing and saw that the permanent hold had changed to 66. Re-set to 77 and again set permanent hold, had the wife verify the display. This morning the set temp was 68. WTF?

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#1 Check/Replace battery cells (probably two AA size)

         - If battery cells have leaked then throughly clean the battery compartment, surrounding and contacts

 

#2 Check for the condensation inside the thermostat itself.

         - mine had condesation getting formed, that damaged the tracks. Fortunately, I could fix it in our electronics hardware lab.

 

#3 The semiconductor component on the board may have been damaged. could be moisture, ESD damage.

         - This will require the replacement, unless you know how to diagnose/repair electronics parts.

 

#4 Honeywell might replace if it's under warranty

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