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

1 Answer

Nothing working, unknown errors

I'm not sure my model number because i can't find it as escribed by the search function (why this company can't simply list the model # in an obvious place is beyond me). I see some mechanically printed numbers along with 'Made In Taiwain' that read T7300F2184, this isn't listed as a model number anywhere though..

Anyways, the AC isn't working (or anything really), but its 85°F and i'm sweating just typing. I set all the programs to begin at 1 or noon and put temp to 65°F but it doesn't do anyhing (It's been 5 days now). If I press temp occupied button it says 'override', if I press the continuous unoccupied button it says 'hold' . Sometimes it won't let me change the Fan option but other times I can only cycle between on and auto (I swear there used to be an 'off'). The fan seems to be on very midly in a back room but it's not cold air (and it might even be hot, I can't tell cause its so damned hot in here).

If I select a system setting it doesn't do whatever function it's told and sometimes it shows the little snowflake icon and sometimes it says wait indefinitely.

>,<

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  • 1,202 Answers

Sounds like the tstat, obviously, isn't responding. A sure check is to bypass the tstat. Turn power off to airhandler and remove cover. Remove red, green and yellow wires and wire nut/ twist together. Turn machine on and see what you get. If inside and outside turns on...bad tstat OR just not setup properly. EVEN THE PROFESSIONALS READ THE INSTRUCTIONS THESE DAYS!!

Posted on Mar 04, 2017

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

machtcl1
  • 61 Answers

SOURCE: heater comes on at 5:10 am prior to the programmed setting

Access the installer setup menu (You will need the installation manual from the t'stat to do this) and turn off the "intelligent recovery" feature. This feature turns the equipment on in order to bring the conditioned area up to temp at the set time. Or you could set the "wake time" to 6:50!!!

Posted on Dec 16, 2008

  • 70 Answers

SOURCE: Thermostat seems to be working, furnace does not always turn on

Joss sounds like the anticipator setting on thermostat i would replace it with a digital it will be more actturat . The furnace has to go over temp setting to turn off

Posted on Jan 18, 2009

  • 70 Answers

SOURCE: Furnace not cycling properly

sounds like the flame sensor needs to be replace. You can try cleaning it with steel wool. This will get you by for a little while.

Posted on Jan 20, 2009

clyde2j2
  • 137 Answers

SOURCE: Honeywell programmable Thermostat won't hold time or program

Most thermostats use a six volt transformer for a power source, similar to a door bell, you can tell if yours does by looking at the wires that are attached to the thermostat.

The wires will be thin with just a single strand if you have these wires then you have a transformer, try and find the transformer (good luck) test it with a voltmeter if it fails the test that's it, if not, call the man. Probably it though.

Posted on Feb 15, 2009

  • 27 Answers

SOURCE: The fan on my central heating system keeps running

IN MOST PROGRAMMABLE STATS THERE IS A FACTORY DEFAULT PROGRAM.IT COULD BE
RUNNING IN THAT MODE.FIRST,CHANGE THE BATTERIES IN THE STAT.ALSO,THEY HAVE A
RESET BUTTON ON THE CIRCUIT BOARD.TRY THAT.AND,BY THE WAY,YOU ARE NOT SAVING
ANY MONEY BY DOING A TEMP SETBACK.THE HEAT SYSTEM WILL USE JUST AS MUCH
FUEL EVERYDAY TO RECOVER THE LOST HEAT DURING THE SETBACK PERIOD.ALSO,THE STAT COULD JUST BE BAD.

Posted on Mar 07, 2009

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