Honeywell T8131A Programmable Thermostat Owner’s Manual

Honeywell T8131A Manual: Questions and Answers

How do I set the Honeywell T8131A for an electric heat system?

Move the FUEL SWITCH on the back to the E position. Owner's Manual, p. 13

What does the bAt Lo indicator on the Honeywell T8131A mean?

The batteries are running low. Replace them as soon as possible; the indicator flashes for one to two months before batteries run out completely. Owner's Manual, p. 16

How do I know if the Honeywell T8131A is getting power?

A green LED located to the left of the LCD display indicates the thermostat is powered properly. Owner's Manual, p. 18

Can I replace batteries in the Honeywell T8131A without reprogramming it?

Press down on the left ends of the batteries to remove them. Insert fresh AA alkaline batteries with correct terminal orientation within 20 to 30 seconds, and you won't need to reprogram. If the display goes blank, reprogram the thermostat. Owner's Manual, p. 17

What temperature range does the Honeywell T8131A support?

45°F to 88°F [7°C to 31°C]. Owner's Manual, p. 18

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