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

2 Answers

Honeywell thermostat won't regulate temp properly

Setpoint for cooling and room temp are 4 degrees off . system is single stage, 2 zone - i replaced the original thermostat with the exact same model T8400C1099 honeywell thermostat - same problem as before with varied setpoint and room temp

Posted by on

  • docholliday0 Dec 06, 2013

    I had to change a setting on my thermastat. I have hot water heat provided by a gas furnance. I held the up and down buttons simultaneously until 5 / 5 showed up. I push the down button until the later 5 was down to 3.

×

2 Answers

  • Level 1:

    An expert who has achieved level 1.

    Corporal:

    An expert that has over 10 points.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 6 Answers

Is there a setting on your thermostat that makes the unit stay on for 10, 15, 20, 25 minutes after you reach set temp. You can change this setting by looking at your manual for the thermostat. Not sure if there is one for this thermostat but mine has one. Mine was running 15 min after set temp and making it cool down 2 degrees lower than set temp. Hope this helps.

Posted on Jun 25, 2009

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Governor:

    An expert whose answer got voted for 20 times.

    Hot-Shot:

    An expert who has answered 20 questions.

  • Expert
  • 148 Answers

Check to differential setting in the thermostat and are you saying the temp in the room and the set temp is being read from the thermostat or is there another thermometer in the room your looking at

Posted on Jun 25, 2009

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

How do i adjust AC temperature variance on a Honeywell TH5220D1003 thermostat


If you are talking about the difference between heating mode and cooling mode and the room setpoint, you can not change it. It comes from the factory with a 3 degree difference. In other words if you raise the heat setpoint until it is within 3 degrees of the cooling setpoint, for every degree you raise the heat setpoint the cooling will raise a degree.
About all you can do is increase the distance between the heat and cooling setpoint. To do this either lower the cooling setpoint to 3 degrees higher than the heat setpoint you want and then increase the cooling setpoint the desired setting. For example heat and cool setpoints are 67 and 70 respectively, and you want 65 and 73. Lower the cooling setpoint to 68 and then raise the cooling setpoint to 73. Now your heating will come on 3 degress lower than 68, the 65 you wanted and cooling will come on at 73. Remember, the thermostat new setpoints will turn on the cooling at 75 and turn back off at 73 and heat will turn on at 63 and turn off at 65.
You can perform the same using the heating setpoint, just have to look at it backwards. If you need to lower the difference I recommend a 8000 series thermostat. They are the most functional thermostat that Honeywell makes, be in mind they are about 3 times more expensive and many of the setting require a well trained tech to interpret and set properly.
Hope this helps.

Aug 24, 2014 | Honeywell Th5220d1003 Non-programmable...

1 Answer

I have a Honeywell EMM-3 Electronic MiniZone Panel and my thermostat is set at 78 degrees but the house is registering at 89 degrees and it won't cool down although the a/c has been on all day for...


Zoning, in the A/C world, refers to different areas of the house which may be cooled to different temperatures. Zoning is accomplished by closing/opening vents.
Zone 1, 2, 3 etc. do not have any particular meaning, except to indicate zone control flappers 1, 2, 3 etc. which are physically inside the ductwork which determines the zoned area.
Just because you have this fancy thermostat, does not mean that your house is actually zoned, but I am not to sure why such a thermostat would be purchased if it was not (unless it was free).
Zoning uses dampers. Is there air blowing out of the registers?
:o).

Jun 04, 2011 | Heating & Cooling

1 Answer

My AC unit is 3 years old. its set at 72 but wont go below 78 degrees. im in Las Vegas...Help


Set System Switch to Cool and lower setpoint below room temperature.
Verify thermostat and system wires are securely attached.
Diagonistic: Set System Switch to Cool and lower the setpoint below the room temperature. Within a few seconds the thermostat should make a soft click sound. This sound usually indicates the thermostat is operating properly. If the thermostat does not click, try the reset operation ( . If the thermostat does not click after being reset contact your heating and cooling service person or place of purchase for a replacement. If the thermostat clicks, contact the AC manufacturer or a service person to verify the cooling system is operating correctly.
Or call the techline 18002842925.

Jul 18, 2010 | White Rodgers White-Rodgers 1F85RF-275...

1 Answer

We have the white and rodgers thermostat model 1F81-261. The problem is that the ac unit will not work. We have reset and changed the batteries and set the point 4 degrees less than the actual room...


Set System Switch to Cool and lower setpoint below room temperature.
Verify thermostat and system wires are securely attached.
Diagonistic: Set System Switch to Cool and lower the setpoint below the room temperature. Within a few seconds the thermostat should make a soft click sound. This sound usually indicates the thermostat is operating properly. If the thermostat does not click, try the reset operation ( . If the thermostat does not click after being reset contact your heating and cooling service person or place of purchase for a replacement. If the thermostat clicks, contact the furnace manufacturer or a service person to verify the heating system is operating correctly.

Reset the thermostat by pressing , UP,DOWN and TIME at the same time.

Jun 28, 2010 | White Rodgers White-Rodgers 1F85RF-275...

1 Answer

I have just installed underfloor heating with 4 zones. I also have the existing radiator system. The radiator system is currently programmed to come on and off twice a day but has no room thermostat. We...


You say you have3 rooms on the underfloor system that will probably require different temps. You said you have 1 zone valve for the under floor system. You can not control all the rooms with different thermostats and only 1 zone valve. You need more information and professional help here. I can give you more advice too...

Jun 22, 2009 | Honeywell Programmable Thermostat Heater

1 Answer

Honeywell T87f 3855 Doesn't Activate Heater


thats becaue you need more than this zone working like you said about the master/slave this zone is a slave.

Jan 25, 2009 | Heating & Cooling

1 Answer

Heat pump auxiliary heat does not turn on


Turn up your outside thermostat in the outside unit.
You should have about 3 degrees difference in one stage to the next. So I would change the thermosat with one that has three stages of heat.

Nov 25, 2008 | Honeywell TH4210D1005 Heater

Not finding what you are looking for?
Heating & Cooling Logo

Related Topics:

1,088 people viewed this question

Ask a Question

Usually answered in minutes!

Top Honeywell Heating & Cooling Experts

Bill Long

Level 3 Expert

587 Answers

paulcarew

Level 3 Expert

2463 Answers

Brandon Berry
Brandon Berry

Level 2 Expert

407 Answers

Are you a Honeywell Heating and Cooling Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...