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Anonymous Posted on Jun 12, 2017

Rth111 does not turn on when cold

When the temperature in my garage gets extremely cold and I turn the thermostat on to heat, nothing happens. All I see on the digital display is LO. I don't see the "heat on" display. If I remove the thermostat from the mounting plate and jump the wires the heater works fine and I can even put the thermostat back to its mounting plate and will continue to work OK. Normally works OK when the temp inside does not go below 32 degrees in the garage. Thanks, Pete

1 Answer

Heatmeister99

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  • Contributor 40 Answers
  • Posted on Dec 04, 2017
Heatmeister99
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Too cold for batteries or they are low. Litium Ion work well in the cold but check tstat instructions for compatibility.

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Anonymous

  • 3 Answers
  • Posted on Jan 05, 2009

SOURCE: wiring diagram to connect programmable Thermo to Heat Pump

I don't know if this will be helpful or not, but I just installed a new Honeywell and the Honeywell customer service guy helped me get the wires done correctly. The number is 800-468-1502.

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Anonymous

  • 5 Answers
  • Posted on Apr 26, 2009

SOURCE: Honeywell CT3611 thermostat, not working..

if you cross the two wires and you see a slight spark and heat comes on, then the problem is in the thermostat, if not then problem is at furnace it self.

Anonymous

  • 146 Answers
  • Posted on Jul 26, 2009

SOURCE: No display on Robertshaw 9600; unit seems dead/furnace works

Hello
you have to have a thermostat! The thermostat tell the unite what to do. Get a new one.

Testimonial: "A+A+A+ Good attitude!"

Anonymous

  • 79 Answers
  • Posted on Nov 20, 2009

SOURCE: my thermostat quit working

I work alot with the Honeywell thermostats and in the past couple of years I have seen the Vision Pro thermostats have some fail issues. There is a 5 year warranty on these thermostats so you should'nt have to pay for a new one if it's under 5 years old.

Anonymous

  • 43501 Answers
  • Posted on Dec 12, 2009

SOURCE: Honeywell RTH2310 thermostat temp variance

Hi,
Yes you can change that by change the number of cycles per hour that your t-stat looks from for youe furnace. Lower the cycles per hour number and it will increase the range.

You can see how to do it here

http://dl.owneriq.net/3/39359643-dfda-451d-bb81-828eecddd9fc.pdf

I hope that this will help you to solve your problem!

Thanks for using Fixya!!

Heatman101

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