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Honeywell RTH221B Support Question

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Question posted by curley on January 24th, 2013

How Do I Open The Rth221b Thermostat

I can't find a way to open the thermostat to replace the batteries. I have a low battery sign and need to replace the batteries.

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Related Honeywell RTH221B Manual Pages

Owner's Manual - Page 1

... until you need to wait five minutes before restarting. If the thermostat is following modes. • Cool: System is in compressor protection Your thermostat has a... Press to override schedule and hold temperature Press to follow ) programmed schedule 1. Low-battery warning Permanent schedule override Schedule period Clock Temporary schedule override Temperature System status •...

Owner's Manual - Page 2

... temperature is opened. To change the setpoint temperature, press either button more than once. The word Hold will disappear and the thermostat will flash.  To program the temperature settings for each of a consumer. Install two fresh AAA batteries when Lo Batt (low batteries) flashes on the • The temperature sensor circuit is displayed. Replace batteries once...