Question about DeLonghi Pinguino PAC-77E Air Conditioner

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My Delonghi K900 overheats after only an hour of use. It is so hot, I'm afraid it will start a fire. Also, it only cools the indoor air to match the temperature outside. I thought I was purchasing an air conditioner that would actually cool the air. 

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Hello, have you tried shortening the length of the exaust hose, portable air conditioners rapidly loose performance when the hose is long. The exaust hose needs to be as short as possible with the fewest possible bends. The overheating is usually caused by the unit struggling to push the heat away from it, this would also explain the less than satisfactory performance. Another thing worth checking is that the filter and the fins on both radiators are clean as dirt will decrease its ability to move heat. Hope this helps.

Posted on Aug 01, 2009

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Posted on Jan 02, 2017

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Our AC keeps cutting out. It runs for a few minutes then stops. have to switch off and restart. Any idea why? Have emptied water and cleaned filter recently


Look for:
  1. the ac needs air flow thru the indoor and outdoor radiators
  2. the outdoor radiator coil should get warm/hot and produce warm air.
  3. indoor radiator coil needs should get cold and produce cold air.
The ac needs the fan motor(s) working and compressor running and pumping. Compressor skinny copper line hot and thick line cold.

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14 Overheat Wrap Fault
Ensure high fire and low fire manifold pressure are correct.
Check gas type of unit and ensure it matches gas type being used.
Check heat exchanger for cracks and/or separations.
Ohm out safety circuit.
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Check for a foreign materials in combustion chamber and/or exhaust piping.

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There a several things that can cause the problem you have described.

1. The Dehumidifier Mode is operating at the same time as the AC or is operation on it's on.
In dehumidifier Mode heat is produced.

2. Air filter needs to be removed and cleaned.

3. A blockage or crimp in the exhaust hose.

4. The exhaust has a leak or has come loose from the unit.

5. The unit is sitting in direct sunlight or is adjacent to a heat producing appliance.

6. Compressor needs to be recharged with R134a refrigerant gas.

The 6 things listed above are where you need to start troubleshooting. 5 of which are easy to check and correct.

Hope this helps you and thanks for choosing FixYa.

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Hi there.
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You can download the Manual that matches the Model of your Indoor Grill.
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Try this link. I do not see a "K900" but maybe it is a start.
http://www.delonghi.com/Int/USA/customer.html

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does anyone no where to find a user manual for this air conditioner?

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