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

1 Answer

Why does the air conditioner comes on when turned its turned off at the thermostat?

Had the air on for a few days then it cooled off so we turned it off. Ice has formed on the unit where the wires from the house & unit meet.

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Loyalty:

    Visited the website for 30 consecutive days.

  • Master
  • 372 Answers

Sounds like the internal thermostat is stuck causing the unit to think that it is not cold.

If you would like to tackle it yourself it is usually a part of the Expansion valve, witch will require opening the system. I suggest a service professional as Freon is hazardous, and being wrong is expensive.

It could just be that the rheostat on he control knob is going bad BUT that wouldn't cause Ice to form on the Unit.

Posted on May 15, 2014

6 Suggested Answers

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

  • 230 Answers

SOURCE: central honeywell air conditioner

Sounds like it may have lost power. Check the breaker and the fuse at the furnace. If they are all in the on position and working then it sounds like you may need a technician. If the display is blank on the thermostat you may also want to replace the batteries.

Posted on Jun 17, 2008

muttandjeff
  • 359 Answers

SOURCE: Installing Honeywell RTH7000 - I have too many wires!

check to see if the B terminal is on the new t-stat if connect to it , but this terminal refers to heat pumps and is normally use to energize the reversing valve on the outside unit and not used on ac units , but normally the tag O/B is the same terminal on therostats

Posted on Oct 26, 2008

  • 72 Answers

SOURCE: I can't get my Air Conditioner to come on ?

Clean the filters of the air conditioner. Also, if the unit has been running for a few years without proper maintenance you must expect lots of dust in the evaporator unit. This is usually easy to clean with compressed air.

Good luck!

Posted on May 21, 2009

  • 22 Answers

SOURCE: Bought 44155c hunter thermostat air won't turn on.

If unit worked before you tryed changing t-stat then its possible the t-stat wires are shorting each other out.take t-stat back off cut back wires a good 6 to 10 inches or if you dont have that much wire to play with just cut back as far as you can and make sure there is no bare wire touching each other ,then just to test unit to make sure its working ok twist yell.,red,green together this should bring both units on and should blow cold.if this works up to this point on the new stat read directions closely there might be a jumper wire in the stat that needs connected usually from y1 to w1 you would install a jumper wire .see if this helps if not write back i have 1 other solution.i hope this helps

Posted on Sep 15, 2009

  • 767 Answers

SOURCE: No heat after installing honeywell thermostat H8110U

hook up the blue wire in the furnace cabinet where the blower section and the other thermostat wires are connected to the furnace. the thermostat you have uses a common wire from the thermostat to the furnace and this needs to be hooked up in the furnace otherwise you will have the problem you are having.

Posted on Dec 07, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Unit not working correctly. The unit worked for the winter, few days ago I turn on the AC and noticed that it wasn't cooling like it should.


It's could be the board or a heat relay. See if you have 24 volts on "x2" im assuming, emergency heat when in cool mode if so it's the board. Or unhook black or x2 or your emergency heat from board and run unit in cool. If heat stays on its a relay

Jun 02, 2016 | Heating & Cooling

Tip

How to fix problem of Air conditioner doesn't cool


How to troubleshoot and repair the most common problems with your central air conditioner Although some central air conditioner repairs must be handled by a qualified air-conditioning repairperson, you can handle simple repairs and maintenance yourself. Following, you'll find guidance based on the symptoms.

Air conditioner doesn't cool A central air conditioner that runs but doesn't cool may just need to be cleaned. Plan to do this on a relatively warm day. The following are basic guidelines, but always refer to your owner's manual.
1) Before you begin, turn off the power to the unit. There is normally a shut-off or disconnect panel on the house wall next to the outdoor compressor. Also shut off the air conditioner's 240-volt circuit at the main electrical panel.
2) Rake leaves and debris away from the outdoor condenser. Trim any bushes that might block airflow.
3) Unscrew and remove protective grilles and the top cover or grille from the compressor. If the fan is attached to the grille, be careful not to pull any wires loose.
4) Use a soft brush to clean dirt and debris from the fins, and then vacuum the fins with a brush attachment (taking care not to damage the fins).
5) From inside the unit, use a hose and nozzle with a trigger-grip to spray debris from the fins (protect the wiring and motor with plastic sheeting or a large plastic garbage bag). If your owner's manual calls for lubricating the motor, do that now--but don't overlubricate.
6) Reassemble the unit.
7) To test it, turn the thermostat to "Off," reset the power at the disconnect by the compressor and the main panel, and then set the thermostat to turn the unit on. Important note: To avoid straining an air conditioner's compressor, wait at least five minutes between turning it off at the thermostat and turning it back on. Let it run for a few minutes, and then feel the two pipes that connect to the condenser unit on the air handler (slide any insulation back). One should feel warm, the other cool.

on Sep 02, 2010 | Heating & Cooling

1 Answer

Compressor comes on and blows 52 degree air, but will cycle off and on every few minutes.


could be or the compresor is going off on a safety. replace run capacitor.

May 28, 2014 | Dometic 57915531 Air Conditioner

1 Answer

Duo therm rv air conditioner repair


Sounds like thermostat is failing. There is a factory set resistor that helps the thermostat keep a 2 degree accuracy. Second possibility is that you have a fan or direct airflow from the cooling system, being devirted, that is allowing the cool air hit the thermostat on the wall.

Aug 17, 2013 | Heating & Cooling

1 Answer

LG a/c not cooling


you may have freon leak, does the compressor turn on.?

Jun 02, 2013 | LG M5203L Air Conditioner

1 Answer

You can set the temp for the unit to come on and it comes on and runs and cools for a few minutes then the compressor cuts off then the fan a little later. After a few minutes it comes back on and does...


Is the AC set on an energy saving mode. Together with this program if the thermostat is defective the same symtoms can appear. So please check on the thermostat and replace.
Since the compressor is cutting off the cooling does not take place to the extend that is set.

Aug 30, 2010 | Whirlpool ACC184PS Thru-Wall/Window Air...

1 Answer

I turned thermostat down but air won't come on.


do you have thermostst turned to cool, and the other question is do you have a programmerable thermostat if so you need to program your thermostat to the desired temp and the desire time of day and days of the week, and then press run program



Melvin

St Lous

Oct 03, 2009 | Ambiance Designs Heating & Cooling

2 Answers

Central air conditioner doesn't turn on... Any suggestions?


If the compressor turns off and won?t come back on during a very hot day, the unit may have built up a high "head" pressure and the high-pressure limit switch may have tripped. This is usually located right inside the access panel on the compressor unit. Simply push the button to return it to operation. If your central air conditioner doesn't go on automatically: 1) Be sure the thermostat is set to "cool" and set below room temperature. 2) A central air conditioner should be on a dedicated 240-volt circuit; check the main electrical panel and any secondary circuit panels for a tripped breaker or blown fuse. If you find the problem here, reset the breaker or replace the fuse. 3) Make sure the furnace power switch is turned on and that the outdoor condenser's power switch, mounted on the outdoor unit, hasn't been shut off. Also be sure the 240-volt disconnect next to the compressor (in a metal box, usually mounted on the house wall) hasn't been shut off. 4) Turn off the power to the air conditioner and check the thermostat. 5) Remove the thermostat's cover and unscrew the wire from the Y terminal. 6) Turn the power back on. 7) Holding the wire by its insulation, touch the bare end to the R terminal and hold it there for about 2 minutes. If the compressor kicks on, the thermostat is faulty; replace it or call an air conditioning technician. If the compressor doesn't go on when you hold the two wires together, turn the power back off and call a service technician.

Jan 18, 2006 | Haier Energy Star ESA3183 Air Conditioner

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

38 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...