Question about Honeywell Programmable Thermostat Heater

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Honeywell rth2310b battery replaced now no heat will go on

The batteries died...after replacing batteries i programmed it but the heat wont go back on and it still says there is low battery... what do i do?

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5 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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  • 1 Answer

SOURCE: Battery Issue

This worked! Thank you! It was 49 degrees in the house, and now the heater is working again.

Thank you and warm wished for the new year!
Mary

Posted on Dec 30, 2008

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  • 1 Answer

SOURCE: flashing battery symbol

I had this same problem today.  I called Honeywell and they said the flashing broken battery symbol may mean low batteries, or it may mean the battery type is incorrect.  They recommend only non-rechargeable alkaline batteries.  I was using rechargeable NiMH batteries.  Even though they were fully charged, I had the flashing battery symbol and the thermostat relay would not work.  I replaced with alkaline, the flashing battery indicator went out, the thermostat works again.
Odd that it worked for 3 months on the rechargeables after first install. I did notice the broken battery symbol came on after the first few days, but I checked the battery charges and they were good, so I disregarded the symbol until the thermostat stopped working today.  Apparently there is something about the NiMH performance characteristic that the thermostat doesn't like.

Posted on Feb 18, 2009

FixinFax
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SOURCE: I lost my RTH2310B manual

http://customer.honeywell.com/techlit/pdf/69-0000s/69-2229ES.pdf

Posted on Nov 07, 2009

  • 1 Answer

SOURCE: The battery in our Honeywell ST6400C programmer

Hi shastalaker

Thanks for the info but how to get the front cover off. Two screws underneath allow the whole unit to be removed but then - nothing. There are two plastic tabs but they do not release anything as they are at one end. The other end remains firmly fixed.


Any thoughts

BigAl

Posted on Feb 19, 2010

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