Question about Heating & Cooling

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Split type aircon us12a1ve

On cooling the delivery air t drops back to 15 d then stops cooling after about ten minutes system re starts but only cools about 3 minutes

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  • 5 Answers

Same here. Your temperature difference is normal at 15d. Need to know your set-point. If the unit cycles on close to set-point, Then it's probably normal. Without more info your question doesn't make sense.

Posted on Jan 04, 2014

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Posted on Jan 02, 2017

  • 230 Answers

SOURCE: Cools for a while ... keeps running but stops cooling.

If the refrigerant has been accurately charged and diagnosed, I would look for an air restriction. Check your filter first of all. It sounds like it may still be trying to freeze up. Make sure all the vents are at least a little open and the return grill is not blocked. In the Rocky mountain region we like to see around 44- 50 deg. at the vents. 65 would tell us that everything is not ok.

Posted on Jun 17, 2008

relaga58
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SOURCE: Goodman wmc24-1a split system - fan stops on dry mode

that's normal

Posted on Aug 11, 2009

  • 2 Answers

SOURCE: Split system getting cold at first then just not cooling the room

Split Air Conditioners are not meant to run constantly. so check this first . you may have a faulty component i.e. compressor, condenser, evaporator, or evap fan. Depending on your technician you may have gotten ripped off. You need to find out if he checked the system for refrigerant (gas) leaks. A good way to tell if your ac is leaking is feel the low and high side copper pipe in between the inside and outside units.
the smaller pipe (high side) should be hot be carefull maybe touch it with an ice cube. The Large pipe should be cold but not iced over.
if there is ice on any component you should call a qualified tech. you probably have a leak. you should also clean your air filters which are right above the vents. I am a certified AC mechanic and i have seen this problem. in Iraq because of ambient temperatures being high the systems take alot of abuse and we dont fix them because repair costs exceed replacement costs alot of the time. good luck.

Posted on Nov 19, 2009

shastalaker7
  • 1515 Answers

SOURCE: have a reverse cycle split system LG aircon

Hi, dealing with these ductless split systems on a daily basis, I can say you have checked some of the things I would have wanted you to check, which is good on you're part.Blowing Room Temp. air in both heating and cooling indicate that the compressor is not running even though the outdoor condenser fan is on.There are several things that could cause this. You have a compressor run capacitor that starts the compressor, but I am thinking on you're unit, it has a dual capacitor that runs the compressor and fan together. Fan is on, so I will rule this out.These units are notorious for leaking freon as the Liquid line and suction lines are not brazed, they are put together with connectors that tend to leak over time. If it is low enough on Refrigerant gas, the compressor will shut off and stay off on low pressure. This unit has a low pressure switch that has normally closed contacts, that opens and stops the compressor from any damage which in turn, you will have no cooling or heating.Do this for me, turn the unit on in cooling, lower T-stat way down so outdoor unit comes on. Go to the out door unit and where the elect. wiring and lines go into unit you will see to copper lines. The largest of the 2 lines is the low or suction line.Wrap you're hand around it and it should be nice and cold. If it is warm, just touch the smaller line, it should be rather warmer, almost hot.If both lines are of normal temp. you are either out of freon or the compressor isn't running.You can remove panel to get to it and put your hand on it to see if it is on. If the lines were of normal temp. and the compressor is not on, more than likely you have lost the charge.Look it over, the wiring to see if you see anything burned or connections burned off and so on. You can check the 3 wires going into the compressor by turning off the power at breaker and removing the cap covering wires just to make sure these wires are intact. sometimes one will get hot from power and burn off. If you see this problem, it would be something you could fix.If all looks good, go back to the copper lines and being this is a Heat-Pump, you should have 3 fittings where we install our gauges to check and fill systems with freon. Look for one that is on the unit itself and remove the plastic cap.Don't be alarmed if you do as nothing will come out.If you look inside the valve, and you see a Schrader core, you can depress it with a nail or something small, just enough to see if it has a lot of pressure in it.If very little or none, the system is out of freon. You will have to call a tech out to find leak and evacuate and re-charge system.I wanted to give you many things to check so you and I would know what the problem is, a process of elimination. If you have a lot of pressure, then more then likely you have a faulty compressor. If you feel that you would rather not check the electrical or depress the Schrader, I fully understand.You can at least check the temp. of the lines and listen to see if the compressor is running, and if it is with warm lines it is still low on freon.Please keep me informed, and again the long explanation was for you to understand more about you're system operation. Sincerely, and best of luck,
Shastalaker7

Posted on Nov 23, 2009

bobicehouse
  • 1524 Answers

SOURCE: COMPRESSOR RUNS FOR TEN MINUTES STOPS AND WILL NOT COME BACK ON

Check amperage while unit is running.

Posted on May 08, 2010

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