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How do I change the batteries on a honeywell/34 Model CT3400

Trying to change the batteries on my thermostat, where do they go?

Posted by Anonymous on

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Posted on Jan 02, 2017

  • 252 Answers

SOURCE: How do I open the Honeywell programmable

Go to myhome.honeywell.com and search for a manual for your model number thermostat on the right hand side of the page.

Posted on Oct 05, 2009

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