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Air conditioner isn't cooling down as much as it should. whats the problem?

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Could be almost anything,the biggest culprits are low charge or dirty filter/coils.

Posted on Aug 04, 2008


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I cannot get my temp down to 58 but stays at 68

What is the BTU rating of the unit and what size space are you trying to cool down? Air conditioners move heat from one area to another. Possible reasons for not achieving the temperature you want are 1) the air conditioner you are using is too small to cool the size room you have or 2) the space where you are trying to exhaust the hot air from the air conditioner is too hot to allow your air conditioner to move enough heat out of the room you are trying to cool.

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My portable. Air conditioner. Isn't cooling

Could be a number of things, Is the compressor running? If so, are the filters clean? ( Both the outlet and the inlet filters.) One at the front where the air comes out and one at the back where the air goes in.

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I have a LWHD1500ER. It runs fine, the fan works pretty well, it runs through it's cycles( on then turns cooler off then back after awhile.) but it isn't cooling, the air coming out is not very...


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Aug 28, 2011 | Heating & Cooling

1 Answer


A portable air conditioner may not cool for several reasons. Check the filter by removing the unit's grill and clean the filter.
Also check for clogs in the evaporator or condenser coils by light vacuuming. Make sure the evaporator isn't frosted over, but if it is, allow it to defrost and normal operation should resume.
Lastly, ensure the ambient temperature is lower than your AC's set temperature, as this can prevent cooling. However, if all of these steps fail to resolve your problem, the compressor may be malfunctioning, and in this case, the compressor needs to be replaced or repaired.
In summary, if the air won't cool, remove the grill and clean the filter. Clean out any clogs in the evaporator or condenser coils by vacuuming them and scrubbing them lightly with an old toothbrush. And since fan is working, you compressor might be defective.
I hope the above information is clear.

Jun 24, 2011 | DeLonghi PAC C120 12000 BTU Portable Air...

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I've had my air conditioner for a few years now and it no longer cools anything. The fan works, the condenser(?) turns on when I set it to cool instead of fan, but the air coming out of it isn't...

You need to determine if the compressor is running, if it is and you have no cooling then you either have lost charge or bad compressor, these units re not worth replacement compressor

Jun 22, 2011 | Goldstar R5208 Air Conditioner

1 Answer

Rudd air conditioner isn't cooling,blowing ,but isn't cooling my house because air is not cold

Hello, first check if the outside unit is running, if it is then check filter to make sure it is clean and that the blower wheel is clean and not dirty. If the unit is clean then most likely you have a low refrigerant charge due to a leak and will need a hvac tech to come out and fix the leak.

Jun 19, 2011 | Ruud UAMB Air Conditioner

1 Answer

Air conditioner isn't blowing cold! Fan works okay but air isn't cool. Can hear hissing sound that sounds like normal compressor function. Do I need a coolant recharge?

You will need the condenser coils repaired before you can charge it. These come from the factory sealed and they should not ever need a charge unless you have a leak. The hissing sound is more likely air in the system being pumped by the comressor and it is coming out a hole in the coils.

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