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My honeywell thermostat Modle: RTH7500D does not stay on schedule. It keeps defaulting to a set temperature

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If your manualy setting the program and it kicks itself off, then your therm is bad, look for your warranty paperwork, or call the distributer and give them model and serial, they can point you in the right direction. If your setting a temp and not manualy holding, then it will set back by default. Check your other settings, ensure they work as well..

Posted on Dec 05, 2008

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I believe what your experiencing is the 75 degrees is the hold temp position...the display then reverts back to the actual room temperature...it doesn't mean the set temperature changed back to 65 degrees. Try to reprogram the thermostat schedules, and try not to use the hold function...just the temporary hold. (which is bumping the programmed temperature up or down until the next programmed period)

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How do I set the temporary or permanent override feature on the Honeywell RTH2310B model thermostat?


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Permanent hold message on thermostat


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The thermostat has a function called "Adaptive Intelligent Recovery".

This feature allows the thermostat to learn how long the furnace and air conditioner take to reach programmed temperature settings, so the temperature is reached at the time you set. For example: Set the Wake time to 6 am, and the temperature to 70°. The heat will come on before 6 am, so the temperature is 70° by the time you wake at 6.

You can turn off this function. Download the installation guide at the next link:
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and look for funcion number 0530 Adaptive Intelligent Recovery. In this manual you also find the way to do a reset with the function number 0710.

I hope this solves your problem.

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