20 Most Recent Honeywell Electronic Programmable Heat/Cool Thermostat - CT3300A100 Heater Questions & Answers


Okay first i replaces the battier so now its reading 17.5 its not gaving me the right temperture

Honeywell... | Answered on Nov 06, 2019


It actually sounds like the batteries are going dead if the 24v from the furnace are not providing the power to the thermostat.

Honeywell... | Answered on Jan 25, 2019


If you want clean air without changing the temperature and without using as much power as on the A/C setting then put it on "Circulation" which just means you'll just filter dust etc out of the air. If you want to change the room temperature put it on Auto at your desired temp this will filter the air longer as it's running more but it will use more power than Circulation there's only a better setting if you tell me your exact requirement eg do you want to cool the room or just clean the air, or clean the air saving power??? otherwise if you don't care about the power cost then the "On" setting is the best as it filters non-stop and cools the air non-stop. Cheers

Honeywell... | Answered on Jan 02, 2019


When the snowflake is blinking the thermostat in in a delay mode designed to protect your compressor. If it does not stop blinking in 15min the stat is bad otherwise something is wrong with the AC

Honeywell... | Answered on Dec 21, 2018


Page 13 of instruction manual

Honeywell... | Answered on Aug 28, 2018


the cooling setting will not go below the heating setting. lower the heating setting so you can lower the cooling

Honeywell... | Answered on Jan 16, 2018


worth checking over heat temp sensors (klixon ) sensors can cause heater to go into a cool down purge Through an open circuit heat exchanger (Klixon ) temp sensor Ive seen before good luck

Honeywell... | Answered on Nov 26, 2017


70 to 72 degrees maximum surely now we are all supposed to be pulling together to save our planet???

I suggest you download the instructions for your type of thermostat. If the thermostat doesn't work per instructions it is obviously faulty.
You could contact Honeywell for advice over such an important matter.

Honeywell... | Answered on Nov 17, 2017


Do you have a heat pump? And if so is it a heat pump compatible thermostat.

Honeywell... | Answered on Nov 15, 2017


no offense but you need some new a.c. guys. what if they were hired to do this job, would they say they couldn't do it? we need model numbers of tstat and indoor unit to help, obviously these colors go to the same components your new tstat will control!

If you need further help, reach me via phone at https://www.6ya.com/expert/thomas_092728000e6acb79

Honeywell... | Answered on Oct 29, 2017


so with system setting cool/ fan setting auto, the condenser runs but the indoor blower does Not? but when system setting cool /fan setting on, the condenser runs and the blower runs?

If you need further help, reach me via phone at https://www.6ya.com/expert/thomas_092728000e6acb79

Honeywell... | Answered on Oct 25, 2017


Basements are supposed to be cooler . after all they are basically a cave .

Honeywell... | Answered on Oct 17, 2017


No. If it's power open and power close you need 3 wires at both locations. If it has a spring you could get away with 2 wires. Depending on how hard it would be to run a new wire you do have the option of changing the damper.

If you need further help, reach me via phone at https://www.6ya.com/expert/thomas_092728000e6acb79

Honeywell... | Answered on Sep 19, 2017


At your indoor unit, look at 1 of the front panels and see if there is a clear, plastic view port. Look through it and try to see a red flashing led. Count the flashes and look at the factory data on the front of the unit. That should give us a trouble code and lead us in the right direction. Also make sure air filters are clean.

Honeywell... | Answered on Aug 25, 2017


Remove the thermostat and just touch the wires together and make it run until heat wave is over then figure it out. Kinda of a pain but at least it be cool

Honeywell... | Answered on Aug 07, 2017


So the indoor fan is running and blowing air inside but it is not cold?? Is the outdoor fan running ?

If you need further help, reach me via phone at https://www.6ya.com/expert/thomas_092728000e6acb79

Honeywell... | Answered on Jul 20, 2017


If you have a float switch on your drain line and the drain is backing up this will cut power to the tstat. Drain slowly drains, float switch resets, power comes back to tstat. That's my educated guess. But, is there batteries in the tstat?

If you need further help, reach me via phone at https://www.6ya.com/expert/thomas_092728000e6acb79

Honeywell... | Answered on Jun 25, 2017


i just called customer service for the same problem. Push the fan button, which is the MIDDLE BUTTON of the 3 bottom buttons, and the UP ARROW button at the same time, you will see the number 1 on the left of the screen. Press the bottom right button until you see the number 28 on the left, 68 should be on the right. Press the DOWN ARROW until you get to the desired temp, it won't go lower than 50. Then press ok.

Honeywell... | Answered on Apr 29, 2017

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