Question about Honeywell Electronic Programmable Heat/Cool Thermostat - CT3300A100 Heater

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Honeywell digital thermostat error code

Misplaced heating manuals for honeywell digital theromastat and beckett burner system. Code is displayed in lower left corner of therm. and looks like a bottle. Burner has green flashing light above reset button. HELP

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  • Anonymous Jan 10, 2009

    why don't they just let the up arrow make the heat go up!!!!! I am calling my husband in germany but its the middle of the night and can't reach him and the baby and I are cold. don't they have online manuals at least? they should post something here. I know there is a way to turn on the heat.

  • Anonymous Jan 22, 2009

    I have a basic digital hoeywell thermostat - nothing fancy like being able to program changes - where I just choose heat/cool and use arrows up and down to set the temperature. I don't know where the manual is. I have it set at either 70 or 71, but the read-out is fluctuating between 65 and 66 for that past 2 days. There is a little flame (assume trouble/error code) above the read-out temperature. Can someone tell me what my problem is and what I need to do -- Hopefully something I can do myself.

    Thanks, Lynn

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6 Suggested Answers

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Posted on Jan 02, 2017

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SOURCE: honeywell round mercury thermostat - heat not coming on

If you tip the mercury switch so that it makes contact and the furnace doesn't start, it isn't the t-stat. Check the connections, then start checking the furnace.
In any case, ditch the mercury t-stat (recycle it properly) and get a new programmable one if at all posible. It will pay for itself many times over by turning your heat down in the middle of the night and back up by morning.

Posted on Feb 10, 2008

  • 2 Answers

SOURCE: Honeywell VisionPro USER SETUP CODES OR INSTALLER CODE FOR TEMP RESTRICTION

You need to get into the installer setup. Download the installer manual from Honeywell or an on-line vendor and it has the installer codes to alter the maximum heat setting. Press the system button and then buttons 2 & 4 at the same time for 5 sec to enter the installer mode. I believe the code is 0600 and then you enter the max temp for heat setting. Press done and your done!. Try this link for the installers manual http://www.alpinehomeair.com/related/Honeywell_VisionPro_8000_%20Install_%20Instructions.pdf

Posted on Feb 12, 2008

  • 5 Answers

SOURCE: Replacing Round Honewell Mercury Thermostat

try to get one that is made for oil heat, the installation is easy only two wires, and the instructions make it easy.

Posted on Apr 26, 2009

  • 19 Answers

SOURCE: permanent hold message on thermostat

press run program.... from there, set the schedule for maximum efficiency. permanent hold only shows up after the hold button has been pressed 2-3 times. If this does not fix the issue, there is a master reset button on the thermostat that will set all settings back to factory default.

Posted on May 17, 2009

  • 3 Answers

SOURCE: Honeywell Thermostat power light

I just had this happen to me a few days ago. I hope you find this response before you did what I did and paid an AC guy $103 for him to do about 5 minutes worth of work. Here goes.

The power is shutting off because your drip line is clogged. Your drip line is the tubing that goes from your compressor (inside) to the outside of your house. When that tube gets clogged up (with algae and dirt) then the water will backup in the line. There is a protection circuit in the line and when it detects water (because of a backup) then it shuts all power to the AC off. If you take a shop vac outside and **** all the **** out then you'll be fine. The AC guy said that when I replace my filter every month that I need to pour about 1/2 cup of bleach in the line (from the inside) to prevent algae from forming and stopping the pipe up. Hope this helps someone out there before it costs them a $100.

Posted on Jun 11, 2009

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