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My programmable A/C thermostat shows power but no temperature (just disappered). No A/C. Fan runs continually. Shows ''Lo Bat'' but changed battery--did not help.

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  • zukin May 02, 2010

    I actually have replaced the batteries twice, so I'm sure that is not it.

  • zukin May 02, 2010

    I have a Rudd Central air conditioner and a Honeywell thermodstd. The thermo # is tb112D1005_1 9923 pf1a.

    I get a lo battery error. I've replaced the batteries with fresh ones two times, so I know that is not the answer. What else could this error message be trying to tell me?

  • zukin May 02, 2010

    I have a Rudd central AC, with a Honeywell thermodsadt. It's not working, to cool, even thought the fan on the unit outside is working. The Honewell display give a "low ba" reading. I have twice tried replacing the battery but that did not fix the problem.

    the last expert wrote me what follows, but it's not clearly written for my level of knowledge and I do not understand it and it is not a clear guide for what to do next.


    where the problem lies is from what will call compressor and dryer this dryer carry out gas and oil from the compressor down to the condenser for cooling with a very tin pipe and then return it back to the compressor when ever the system is short off

    this dryer is like a bullet of a machen gun brawn in colour but some time in black colour

    what you need to do to solve this problem is that unscrew your A/C and then locate the dryer it beside the compressor then compressor is like a black pot heat the dryer with a tea spoon or lite object to dust the dirt blocking the flow of gas from the compressor

    for the compressor you will have to check if it is well connected from the maize i.e wire if so and it fail after you have couple back your AC

    then this means that the dryer is bad you will have to change the dryer and refill the compressor back with gas and oil

  • zukin May 02, 2010

    the compressor works fine.
    The 'lo bat' problem, which is a different problem, IS my problem.

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  • Master
  • 821 Answers

Hello,try as much as possible to see that the battery you purchase is of good quality,because we have witnessed the sale of bad thermostats batteries.you can kindly visit the site below for a more comprehensive solution and instruction.
http://www.homeimprovementsdepot.com/central-air-conditioner-not-working-try-these-simple-troubleshooting-steps/

thanks for using fixya.


Posted on May 02, 2010

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  • Master
  • 2,923 Answers

Listen for compressor noise. Your fan can still work even if the compressor won’t start. Make sure the coils are clean and dust-free. If everything seems ok, perhaps the refrigerant level is low. As it is a sealed system, you can void the warranty by attempting repairs on it. You ought to call a professional appliance repair person.

With regard to "Low Bat", that's a different issue. The A/C internal parts should be checked as well.

Thank you and good luck!

Posted on May 02, 2010

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  • Master
  • 1,416 Answers

Hello,

where the problem lies is from what will call compressor and dryer this dryer carry out gas and oil from the compressor down to the condenser for cooling with a very tin pipe and then return it back to the compressor when ever the system is short off

this dryer is like a bullet of a machen gun brawn in colour but some time in black colour

what you need to do to solve this problem is that unscrew your A/C and then locate the dryer it beside the compressor then compressor is like a black pot heat the dryer with a tea spoon or lite object to dust the dirt blocking the flow of gas from the compressor

for the compressor you will have to check if it is well connected from the maize i.e wire if so and it fail after you have couple back your AC

then this means that the dryer is bad you will have to change the dryer and refill the compressor back with gas and oil

Thank you and thank for using fixya.


Posted on May 02, 2010

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  • Master
  • 674 Answers

Make sure the batteries you installed are good. It sounds like you may have a bad thermostat. Try removing the face of the thermostat and see if everything cuts off. If you still have the info that came with the thermostat you can take a look at that and see if it gives any ideas.

Posted on May 02, 2010

  • Brian Niten May 03, 2010

    Did you get your problem solved? You may need to go back into the programming of your thermostat. They usually have several options such A/C or heat pump. Single or Two stage and so on.

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james3751
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SOURCE: programmable A/C thermostat has power but shows no temp.

Check power totast. Float switch sometomes kills power to stat. Check drain.

Posted on Jun 08, 2009

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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!

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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.

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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.

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Check power totast. Float switch sometomes kills power to stat. Check drain.

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