Portable Haier Air Conditioner Isn't Cooling - HVAC - DIY Chatroom Home Improvement Forum

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Old 07-22-2011, 01:20 AM   #1
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Portable Haier air conditioner isn't cooling

Slowly over the last three years (when I bought it, new) the Haier portable air conditioner we have (CPR09XC7 9000BTU) has decreased in its ability to cool a small room. I'd say we lost about 5 degrees a year for the last 3 years. Right now it's only 5 degrees below the temperature outside the room (85). The fan is working and is blowing hot air out the hose but the room doesn't get cool.

My options are somewhat limited right now, and I wonder what you guys suggest. I read on various websites that sometimes these air conditioners need a recharge, but I also read on other websites that the system is a closed system and therefore shouldn't need a recharge unless it's leaking.

So far I've opened the unit and cleaned the dust off the metal fins over the coils but it didn't seem to help. Also I routinely drain the unit and did that as well. While I had it open I felt the compressor and it was hot.

My apologies if this is not the right forum. I looked and HVAC seemed closest.

Also I'm looking to buy a multimeter to test the capacitors. I figure it's a long shot. I have a related question because I don't know of a local place that carries a multimeter with MFD testing.

Westchester, NY: Where Can I Locally Buy A Multimeter With MFD Testing Support?



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Old 07-22-2011, 01:41 AM   #2
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Have you checked the filters on it? Sometimes it's the simple things that get you. Could be there's just not enough air passing through the coils. Though a leak is also a possible cause.

Also these are very inefficient by default as they use indoor air to cool the compressor which is then exhausted outside. This causes hot outside air to come replace it. Try to locate the condenser intake and reroute it outside. Some modding may be required but depending on the way it's designed you may be able to just make a "air box" that covers that section and add a pipe that goes outside. Keep it far enough from the exhaust.

Here's how my setup looks, to give you an idea

Though if it was better before, I would get it back to what it was before doing any changes.


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Old 07-22-2011, 09:59 AM   #3
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Originally Posted by Red Squirrel View Post
Here's how my setup looks, to give you an idea

Though if it was better before, I would get it back to what it was before doing any changes.
Hi, that's a neat setup! Yes, I am going to try to get it back to what it was before or get a new one. Thanks for your reply.

Does anyone here know what are the most common problems with these portable air conditioning units?
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Old 05-10-2012, 01:02 PM   #4
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I know this is a bit of a resurrection but I actually found an article mentioning the efficiency loss in air conditioners over time. It turns out that up to 18% efficiency loss can be expected in the first five years.

In your case it seems a bit more extreme since the unit is barely able to cool after after three years.

I can tell you that the portable air conditioning units we sell (which once included the model you have) are not designed to be recharged. Some posts here suggest adding a service port on the original charging tube.

I would highly suggest against that as it can be dangerous and will likely cause more issues with the unit. On top of that purchasing the refrigerant that a portable AC uses is not as simple as running to an auto parts store and buying a can because most portable AC's use R410A. Tracking down a place that sells it can be difficult and it's not that cheap.

I'd guess that by the time you fit an adapter, buy the refrigerant, and buy the equipment to fill it you could be well on your way to buying a new unit.

That's all if the refrigerant pressure is the problem at all. the most common component to fail on the AC's that get returned to us is the compressor. I'd expect better than 3 years of life out of one but you just never know.

If you are looking for a replacement this year as it starts to heat up you might look through consumer search, they tend to be fairly objective as they simply aggregate consumer opinions.
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air conditioner , compressor , haier , multimeter

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