Air conditioner won't shut off when temperature reached

Change the automatic temperature detection settings. Many of these Dometic systems have an automatic indoor outdoor temperature gauge that determines when it shuts off. This is separate from the normal thermostat. When the outdoor temperature reaches close to the indoor set temperature the unit shuts off.

I do, as I found I can set the thermostat temperature higher, so the sir conditioner can run less.
Plus, the ceiling fan uses less power than the AC.

heat contactor stuck in.

Check the t-stat to make sure that the "fan" switch is st to auto. If not the fan is in the "on" position and is always on. Otherwise, It sounds like your "Central Air" is a packaged unit(Furnace and air all one unit outside the home) and the fan relay inside the unit is stuck. This need to be replaced. It is the rectangular unit with the leads from the fan motor attached to it.

"The air conditioner cools the room but it shuts of." -- Temperature reached, but does not turn back on automatically? Stops short of reaching temperature? Shuts off for a period, but will come back on only to shut off again later?
Most importantly, how do you get it to turn on again?
"The power light doesn't come on while unit is on." -- If the unit is on and the power light is not, then the power light must not be operating (is burnt out).
Actual answer: "Can I replace the plug?" -- Of course you can.
What is causing you to feel that the plug needs replaced?
:o).

check for sticking sequencer.

dear sir

i think in your air conditioner,s thermostat is not working because there huge of ice on unit. thermostat control to compressor for desire temperature, when temreture reach till desire tempreture it,s cut supply for compressor . and make balance on cool air.
please replace thermostat for solve this problem.


hope answer the question
thank you
please vote!

dear sir /madam
please know what is type your air-con i mean widow type or split type or Central air conditioning's unit .if your air con is window type air conditioner then remove cover (grill) and find there is air filter if your air con split type of then open its cover there down side of cover there.is filter located
if air con is central cooling unit the find out your filter in duct side i mean air blower side where fresh cool air going to your room .

use this method i hope you will find solution of your problems


thank you
please vote!

If you have an air conditioner with a temperature display, use the up or down arrows on the touch pad to change the temperature setting.

However, if you have an air conditioner with only a dial that goes from 1 to 8 (or whatever number), turn the dial up as high as it goes and put the fan speed on high. When the desired comfort level is reached, slowly turn the dial down until the compressor just shuts off. You will be able to hear when this happens.

If the temperature gets a bit too warm turn the dial up in small increments and wait an hour or so to see if your comfort level is reached.

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.