Question about Mitsubishi MSZ-A24NA Split System Air Conditioner

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Do I need to cover this unit in the winter? Or when the unit heats, does the fan still go on? I am wondering if snow buildup will be a problem.

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I have used mine for many years without covering in the winter (in mid-atlantic climate with moderate winters).

Posted on Feb 05, 2013

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If u not using the ac in winter then only u can cover it,covering while operting will result in compressor failure,and unproper cooling

Posted on Nov 09, 2010

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1 Answer

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Ac unit keeps freezing up


what a heat pump is designed to do is reverse the evaporator inside coil and condensor outside coil. it trys to pick up heat from outside and transfer it inside. they work fairly well down to about 40 degrees ambient then not so good. that is why you have auxillary heat i.e. 15 kw. when it was shaking as you saw the compressor is trying to pump liquid instad of vapor as it's designed to. you either have a control issue or it's overcharged.

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It is 22 degrees here in Dallas, Tx and my heater doesn't seem to want to get it any warmer than 67 degrees. My unit is only a couple years old along with my Honeywell TH6220D. Just wondering if it could...


em means emergency heat,which means you have a heat pump.check out door unit,it might be all froze up,or covered in snow,sweep snow off gently. if it's froze up its not defrosting and you need a service call.if your back up heat is not working there might be little window on furnace,look for flashing light inside.if light is steady on its working.

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I do not have winter tires and I am wondering what is the best winter tire for 525XI. I have Continental all season and the winter performance terrible.


Of coarse,All Season Tires, are not for snow

You need a couple of new wheels, and dedicate them to
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There is no problem. Just a basic question. We have a Goodman 14 1/2 seer unit with coil ( I don't know the model #) and live in southern Ontario. My husband insists the unit should be covered for the...


I would say that you both are right. I think the condenser unit should be covered for its own protection. Also if your condenser unit is set up off the ground there will be constant air flow from drain holes in the bottom of the frame. I would want the top and sides covered to protect the coils and fins from damage. Also I don't want a build up of snow or ice on fan motor or around compressor wiring connections. Hope this helps. Thanks

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Do i need to purchare a cover for a/c unit (Achiever Series) for the winter?


The simple answer is no...A cover is ok but if it covers the unit completely you are trapping moisture in the unit.....AC's are made to sit outside...I would simply cover it with a piece of plywood and a rock to keep the snow out and allow it to breathe....also turn off the Breaker in the Winter as there is a small heater that is powered all the time and this attracts mice :)

Oct 25, 2009 | Heating & Cooling

1 Answer

Have a lg lfx25960st has frost on back wall of freezer fan was making grinding noise now no noise and wont freeze ice thanks d hopper


Older freezers have a mechanical timer that shuts the cooling unit off and activates a heating element to melt the ice that forms on the cooling coils next to the fan. Newer ones control it with a circuit board. It sounds like yours is not defrosting and the ice buildup has stopped the fan. Or the fan could be bad and without the airflow thru the cooling coils they are covered with ice.
You need to remove a cover inside the unit to get to the fan, cooling coils, and defroster heating element. There could also be a thermostat attached to the heating element that will need to be checked.
Unplug the unit, disconnect the heating element and check for continuity ( with an ohms tester ) , it should give some reading on the tester. You will need to talk to a repair shop to get the exact ohms it should read. If you have a friendly repair person, they will tell you how to check everything out.

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1 Answer

Fan freezes up with ice in winter


They need air, do not cover it when in use.

If ti cools fine in summer then you just have a defrost problem.

Make sure the outdoor coil is clean.
If the coils are clean, then you have a bad defrost control.

In heat mode the unit should go into a timed or temp controlled defrost. If it is frosting up to the point of stopping the fan, in heat mode only, and otherwise operates properly, then its a bad defrost control.

It is reccomended that the defrost temp sensor be replaced at the same time the defrost control board is replaced. Some temp sensors are part of the board and not a seperate component, but not most.

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1 Answer

This is my first central heating and cooling unit the heat will come on and heat the house but the big fan inside the unit is not running like it did when we would run the ac is this normal


I assume you are reffering to the compressor outside not running. If so this is for A/C only. In fact once the cold is here to stay you should shut off the compressor "breaker" (located either outide next to unit or in fuse panel) and get a good quality cover for winter. This will keep the leaves and snow out of the unit. Just dont forget to take it off in the summer before you run the A/C or you will damage the system.

Sep 16, 2008 | Goodman Heating & Cooling

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