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My display light on my T725 IAQ thermostat just started staying on all the time. It hasn't been doing that. Can you tell me why this has happened?

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6ya6ya
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Posted on Jan 02, 2017

mercadoarvin
  • 384 Answers

SOURCE: honeywell thermostat VisionPro IAQ flashing

Welcome to Fixya.

This error code implies "heating or cooling equipment missing"- on easier terms, something might be disconnected or incomplete as you may not have everything hooked up. If so, you need to go to the installer menu to make sure you have the correct settings.

Here's a user's manual just in case :

VisionPro User's manual

Thanks for using Fixya.

Posted on Jun 04, 2011

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