Air conditioner I was cold suddenly it turned on the light
Why is it cold at first and not cold anymore
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@phamphong could be the refrigerant as well as many other things in between. To prevent us from guessing, it will be very useful if you can tell us what the exact model number for your AC is, as well as what light turned on. Next tell us what you have already tried.
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Sounds like the filter is clogged. The device troubleshooting may mention that, but it could also be under maintenance & upkeep. The AC transfers air through the filter to pump cool air out. A clogged filter means less air is pulled as easily, so the system works harder but less effectively than normal. https://www.google.com/search?q=amana+wa...
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You may have a heating/cooling Amana or an older style one. Years ago I used one, the owner explained that there was a water tray inside, and he showed how it needed water to function right. The water tray needed to be 50% full to function well in heating & cooling.
The water Amana has a flip up door. Inside is a water tray which water can be poured into.
There also may be a flap door at an AC side, which allows the tray to be pulled on. This means it can be filled after being pulled out then be pushed back in. For tray pull & press a partial fill can mean less mess.
