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My airconditioner is just not cooling the way I feel it should. The thermostat never shows lower than 81 degrees. I have it set down as low as 68 but it only cools to 81

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Is this a central unit or a window unit. The central unit does 15*----18 * temperature difference from the air comming in the return air grill to the air going out the supply air grills...9*----to ----14* degree different, and the unit is low on freon,, 15*--18* and the charge of freon is perfect, 19-----22* difference, then the air flow is too low , due to either a dirty filter,, dirty squirell cage blower wheel, and last , but not least, the ac inside coil is plugging up!

Posted on Sep 07, 2008

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My thermostat is set on 68 degrees and it shows room temperature is 68, but the furnace still kickson, Honeywell said it has a 1 degree difference. so what's the problem then?


Yes there is a one degree tolerance, in fact my heater just kicked on and it is set to 67 and the inside temperature reads 67. It is also a Honeywell.

Dec 28, 2016 | Heating & Cooling

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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...

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Just need to know if the temperature should be higher to keep the room cool or lower...mine is in F and goes from 68 to 86 degrees F...Please advise if it should be lower at 68 degrees to keep the room at...


Lower temperature will keep the room cooler. For efficiency sake, lower the temperature gradually to
68 degrees.

Hope this helped you. Thanks for choosing FixYa.

Jul 21, 2011 | Sunbeam Heating & Cooling

1 Answer

I turned my thermostat down this morning to 68 degrees. I came back about 2 hours later to increase the temp to 70 degrees but when I push the ^ arrow instead of showing the increase to 70 it just flashes...


Since it's within 2 degrees of your setting it could be one of two things. Most furnaces run longer (pass your setting) to maintain the setting you made. Which really not a problem. However, your thermostat may need calibrating. To test this theory, place a regular wall thermometer next to your furnace's thermostat and see if the two temps match when the furnace cuts on and then when it cuts off.
If the temps are both the same, the furnace thermostat is fine.

If you're turning it down to 68, because no one will be at home during the day, just set it 2 degrees cooler than 68 degrees. You will then wind up with 68 degrees.

Feb 09, 2011 | Heating & Cooling

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The unit seems to cut off prematurely and then begin the cool air cycle . It heats the room briefly and then cools it down by blowing cool air over the coils. Is this a thermostat problem ?


No I would not think so, a thermostat is only to turn the heater on and off period. Now inside the heater there are controls that set when the blower is to come on usually set at 150 degrees and another to cool down the furnace and this is usually around 130 to 120 degrees. Again these tell it when to run and when to shut down, internally they call them high and low limit controls. I would try to locate the lower limit and boost the cool down temperature up to take care of this problem.

Dec 27, 2010 | Dayton G73 Utility Heater

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I have a Honeywell CT500A thermostat. I set it at 68 degrees. the room temperature is 62 degrees. The unit cycles on and the "flame" icon shows on the screen, but then the unit goes off ( the...


Here is a simple way to tell. Remove your thermostat from it's mounting plate, locate the wiring, the red and white are low voltage control wires. Disconnect them from the base and join the two together if the furnace runs you need a thermostat if not it is in the controls to the furnace.

Dec 27, 2010 | Honeywell CT500 Digital Heat / Cool Manual...

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Indoor temp doesnt go to my punched in setting of 68 on therm


if it is around 93-97 degrees outside,thats all the cool your going to get

Jun 23, 2009 | Honeywell Programmable Thermostat Heater

1 Answer

Honeywell RTH230B a/c problem


if you set the thermostat on 70 and your house won't get ant cooler than 72, there is a problem with your system,not your stat. I'm thinking you are low on refrigerant if it is somewhat working. when the unit is running, if you can get your hand on the larger refrigerant line under the black insulation, it should be cold, about 55 degrees.

Jun 19, 2009 | Honeywell Programmable Thermostat Heater

1 Answer

Whirlpool air conditioner - 8000 BTU - window unit


Your parents must be proud of you! You must have a big red "S" upon your chest!

Aug 22, 2008 | Whirlpool Heating & Cooling

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