Question about Maytag Portable Air Conditioner M6P09S2B

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Suddenly showing "HI" in room temp window. Cold then warm air blows out.

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"Hi" means your compressor has gone off on a high temperature limit. Basically, your outdoor coil is dirty and needs to be cleaned or your outdoor fan has stopped working. An air conditioner works off a simple principle of removing heat using a low temperature and low pressure refrigerant. Your compressor does what it is called. It changes that low temperature, low pressure refrigerant into a high temperature and high pressure refrigerant. Your outdoor fan blows over that high pressure gas and it blows out hot air. First thing to check is to turn your unit on, and go outside and feel if you have any air blowing out the back. If you don't, you have a bad fan. If you do, you need to clean your coil. Spray some simple green on your outdoor coil and let it sit for about 15 minutes. Then grab a hose and under low water pressure, wash out your coil from top to bottom pointing the hose in a downward direction. You do not want to point the hose straight into the unit. Make sure you disconnect the power and allow it a couple hours to dry before you plug it back in. If it's just a dirty coil, you should be good to go after that!!

Posted on Sep 28, 2010

Testimonial: "Quick and concise response."

  • pataylu Sep 28, 2010

    It makes sense since the temp. was 113 here in LA yesterday. Thanks for the help.

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1 Answer

Why is it blowing cold air?


A dehumidifier should blow cold air Carole. It takes in warm moist air, chills it, condenses the water out of the air and returns it chilled and dry to the room. That is the function of a dehumidifier. They often have the function of an air conditioner and blow cold air out of one outlet into the room and hot air out of the window via a venting hose. If yours is just a dehumidifier, it is working as designed

What were your expecting a dehumidifier to do?

Jan 15, 2016 | Amcor Dehumidifiers

1 Answer

Sometimes it blows out warm air warm enough to warm an entire room, yet at other times is blows cool air that can kkep a room cool. I want it to blow cold at all times. how do i do that?


dry air feels cool on the skin

moist air feels warm on the skin

this is why the perceived temperature of air from unit changes

Apr 14, 2015 | Dehumidifiers

1 Answer

Unit alternates cold, warm, cold, warm etc..


in high temps AC units undergo whats called thermal inversion. This is when it blows hot inside and cold outside. I do not believe there is a fix for this. Maybe it is not properly sized for you room? If your unit is too small, it may be working too hard and inverting.

Jul 30, 2014 | Kenmore 75184 Air Conditioner

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REPLACED BOTH ELEMENTS GOT HOT WATER FOR 1 SHOW THEN IT GOT COOLER AND COOLER AND NOW ITS COLD ONLY?


Find a reputable HVAC contractor to do a room by room analysis with heat and cooling loads calculated and units sized and duct requirements and compare to what you have.

The air not being cold is not necessarily an indicator of anything malfunctioning. High efficiency units for instance don't produce cold air.

Since you have had someone look at it, the duct work may be collapsed which restricts air flow or uninsulated which warms up the supply air. Either one is a possibility. Any Cox Cable guys been stompin' around your attic lately? Wouldn't be the first time.

Usually, when the air coming out of the vents is not cold enuf it's because your freon level is low. Probably leaking, but they can usually recharge the freon and it will work for a while. Try another repair company and see if they can recheck the freon level.

We have a high efficiency unit and it produces cold air, so I don't know what previous poster is referring to. Air conditioners are supposed to blow cold air.

Sorry, to tell ya but it is normal if the outdoor temperatures are much below 45 degrees. Below 45 degrees there is little heat outdoors for the heat pump to grab to heat the home so it will run 24/7 and blow cool or cold air. Below 45 the temp of the air coming out the vent will decline and you will get no heat from the heat pump itself as you near freezing.

Your emergency heat or auxiliary heat is electric strip heat. But it only kicks in during normal operation if the temp in the house drops 3 degrees below the setting. (some tstats if can be 5 deg.) Otherwise the heat pump will blow cool or cold air the rest of the time if it is too cold out.

To prevent it from running all the time and blowing cold it is recommended if the temp outside is falling below 45 degrees you should just switch to the emergency heat setting, which shuts the pump outdoors off, and just heat with the electric.

But if there is no heat outside the heat pumps will blow cold. They are the cheapest and most efficient forms of heat but only as long as the outdoor temp is above that 45 deg..

I'm guessing that if you haven't experienced this you live in some place with moderate winter temperatures like in Northern Florida and rarely get very cold winter temps like the freezing you have seen there recently.

It will likely blow much warmer when the outdoor temp rises.


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Sounds like there is a crack in the vent that leads to the drivers side, and hot air from the engine is leaking through.

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1 Answer

Unit not blowing cold air


you have a slow leak in your refrigerant and need to find the leak. you will have to get an AC repairman to come to your house and check it for leaks and fix the problem.

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Your problem is the air temp control blend door actuator is defective and not controlling temp u set. to change/access this part the dash assembly must be removed from the car.

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1 Answer

Dehumidify mode also cools


Some units do cool/dehumidify only im afraid why cant you let the unit dump its hot air into the room then it wont heat or cool the room?

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