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airheatman, HVAC Technician
Category: HVAC
Satisfied Customers: 8326
Experience:  Furnace, A/C and heat pump specialist.
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Replaced batteries in honeywell thermostat T8112D1005

Customer Question

Replaced batteries in honeywell thermostat T8112D1005 ....set clock ... Unit came on and seemed fine buthas now gone dead .... No screen functions on at all
Submitted: 1 year ago.
Category: HVAC
Expert:  airheatman replied 1 year ago.

Lets try Honeywell recommendation for no display first.

Set the System switch to Off. Remove batteries. Insert backward for at least five seconds to reset thermostat. Correctly replace batteries. Display should come on. ï Make sure batteries are fresh and installed correctly. ï Gently clean battery contacts using a soft pencil eraser. Do not use anything abrasive on the clips.