Question about Honeywell Programmable Thermostat Heater

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My honeywell thermostat has a "bat lo" message. I

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Posted on Jan 02, 2017

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SOURCE: I replaced the batteries in my Honeywell CT3300

Per manual do this: System set to Off Remove batterie Replace IN REVERSE POLARITY POSITION or 5-10 seconds Put back in with CORRECT POLARITY Reprogram per sticker on back of thermostat. Done. Just did this myself and it's simple and effective! PaulHaven

Posted on Nov 23, 2011

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  • 254 Answers

SOURCE: The bat lo message will not go away even after

One thing you might want to try is to remove the batteries and wait for a few minutes until everything clears. It could take around 10 minutes or so. This will reset the thermostat. Also look on the back and/or on the board of the thermostat to see if there is a reset button.

I hope this helps! :)

Posted on Oct 29, 2009

  • 252 Answers

SOURCE: honeywell thermostat for a/c heat pump shows the

Go to: http://yourhome.honeywell.com/Consumer/Cultures/en-US/Support/Default.htm

Posted on Mar 11, 2009

  • 29 Answers

SOURCE: My honeywell thermostat has shown a message this

try changing your batteries

Posted on Jun 23, 2009

  • 88 Answers

SOURCE: Our Honeywell programmable thermostat T8132A 1049

The T8132A thermstat requires 2 AA alkaline batteries for operation as the T8131 uses the 24VAC souce transformer with battery back up. If new batteries did not fix the problem follow product user manual to reset and program the thermostat. This should clear any errors or problems. If the problem persists then replace the thermostat. If you do not feel confident you can accomplish the task then you should call a licensed HVAC technician to troubleshoot the issue as the wrong settings could potentially cause permanent damage to your system.

Link:
http://s3.pexsupply.com/manuals/1287594709924/40775_PROD_FILE.pdf

Posted on May 09, 2011

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2 Answers

My beutler 800 said lo bat we replaced them and still reads bat lo


The other "solution" posted here is not a solution. According to this web site: http://www.espenergy.com/faq_honeywell_thermostat.htm


First, replace the batteries with a new set of AA alkaline batteries. If you insert the new batteries within 20 to 30 seconds of removing the old ones, you will not have to reprogram the thermostat. If the bAt Lo indication does not clear itself once new batteries are placed in the device install the batteries backward for 5 seconds, take them out, and reinstall correctly.

So I tried it... put the batteries in backwards. It completely reset the thermostat so I had to reprogram it (which was easy enough). One thing I did that the instructions did not specify. After I removed the batteries, I let it go completely blank before installing them backwards. Then I waited 5 seconds, pulled em out and put them back in correctly and eventually it started flashing indicating it needed to be programmed. HINT: Don't forget to set the current time!

Dec 04, 2010 | Honeywell Programmable Thermostat Heater

2 Answers

Even after replacing the battery, the programmable Honeywell thermostat still shows "Low Batt."


Turn control to off. Remove the batteries for at least one hour. If the display message still reads "bat lo", leave control off, batteries out, and disconnect the red wire on back and wait another hour. Reconnect red wire, put new batteries in and turn system on. It's like a reboot.

Jan 26, 2010 | Honeywell Programmable Thermostat Heater

1 Answer

Bat lo flashing periodically


You need to change batteries. The bat lo light flashes when you have about 10% battery life left. Rus

Dec 05, 2009 | Honeywell CT3200 5-2 Day Electronic...

1 Answer

The bat lo message will not go away even after replacing batteries.. No functions either


One thing you might want to try is to remove the batteries and wait for a few minutes until everything clears. It could take around 10 minutes or so. This will reset the thermostat. Also look on the back and/or on the board of the thermostat to see if there is a reset button.

I hope this helps! :)

Oct 29, 2009 | Honeywell CT3200 5-2 Day Electronic...

1 Answer

6AE Lo


6AE Lo is probably 'bAt Lo'. Batteries are low and need to be replaced.  It looks like 6AE Lo because of the digital readout (b looks like 6).

http://www.espenergy.com/faq_honeywell_thermostat.htm

Model number shouldn't change what the readout means.

Oct 14, 2009 | Honeywell CT3600 7 Day Electronic...

4 Answers

I replaced the batteries in my Honeywell CT3300 and the "Bat Lo" message won't go away even with fresh batteries. Is there a reset button or something?


Per manual do this: System set to Off Remove batterie Replace IN REVERSE POLARITY POSITION or 5-10 seconds Put back in with CORRECT POLARITY Reprogram per sticker on back of thermostat. Done. Just did this myself and it's simple and effective! PaulHaven

Oct 14, 2009 | Honeywell CT3200 5-2 Day Electronic...

5 Answers

I have a Honeywell T8131C programmable thermostat. Our power went out yesterday, and now the "Bat Lo" won't go away. We replaced the batteries, but the "Bat Lo" indicator stayed on...


I tried all the tricks mentioned previously to no avail.

These are the steps I performed to get it to work:

1. Remove batteries and make sure the battery contacts inside the unit are clean.

2. Disconnect all the wires from the back of the unit. Be careful not let any of the bare wire ends to come in contact with each other. Make sure you mark the wires or verify that the color code matches the markings on the rear cover:
W=White wire;
Y=Yellow wire;
G=Green wire;
R=Red wire (low voltage DC); and
C=Common (wire color varies)

3. Leave the unit disconnected with batteries removed for about an hour to make sure all the memory drains. I waited an hour, but it may not require that much time.

4. Install the batteries in the correct positions per the instructions. The unit should perform a power up display test, then the display will flash the time and temperature.

5. Set the clock and the display will stop flashing.

6. Slide the switch to cool and/or heat and program the desired weekday/weekend settings.

7. Slide the switch back to off once all weekday/weekend settings are made.

8. Reconnect the wires that were removed in step 2.

9. System should be operational at this time.

May 29, 2008 | Heating & Cooling

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