Question about Frigidaire FAS155K1 Air Conditioner

1 Answer

Hums and freezes up????

Hi- Just the other day I noticed that the AC unit wasnt cooling. I shut it off and it continued to make a humming noise, although the fan did quit blowing. I removed the front air filter cover and saw that the cooling fins were completely frosted over. The only way to stop the humming sound was to unplug it. I let it sit a few days, unplugged. I plugged it back in and same hummed while the power was shut off. It did cool and blow properly until it once again frosted up the cooling fins. Any ideas would be greatly appreciated. Chris

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that gotĀ 5 achievements.


    An expert whose answer gotĀ voted for 20 times.


    An expert who has written 20 answers of more than 400 characters.

  • Expert
  • 125 Answers
Re: hums and freezes up????

The fan motor must have been stopping. If the fan stops, for sure the fins will freeze because there is no air flowing. common Fan motor problems defective bearing or bushing and starting condenser. If the bearing is defective, it will heat up and seize. Have the fan motor checked. The fact that the fins are freezing, means that there is enough freon and the compressor is working.

Posted on May 29, 2007

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


3 Points

Related Questions:

1 Answer

Outside unit will only run for a short amount of time with A/C before the fan stops turning and starts humming, squealing/screeching and the top of the outside unit gets hot.

The bearings are bad in the motor and after the fan runs enough it eventually gets hot, making the bearing screech and the fan locks up. Need to replace motor again. See if it has a warranty. The reason it gets hot is because the fan is what removes the heat from the coil and if the fan isn't running there is nothing to cool it off so to speak.

Apr 19, 2016 | Air Conditioners

1 Answer

How do i stop my ac from make a loud humming noise when it is time to cold

It depends on what is humming. If it's on the outdoor unit it may be the CONTACTOR. If its on the inside unit, it may be a relay or the tranformer. Can't give a good answer unless we know what is humming. On the o.d. unit is the contactor and its usually what hums only when its cooling. In the electrical panel it is the component that the main voltage wires connect power to the unit. You can change that part and it should go away BUT! I would suggest calling a service tech. Or wait until you need service and have it changed then. A miswire at the contactor can damage the compressor. Work safe!

Jun 22, 2015 | Air Conditioners

2 Answers

Not staying cool

sounds like it is either low on Freon or the compressor is going out. The blowing ice cold is an indicator that it may be freezing up because the low Freon. when it stops blowing cold, turn it to fan only mode and see if it gets colder again. If that is the case then the unit is low on freon and freezing up. I know that sounds confusing but that is how AC works. The low freon pressure means the gas is expanding too fast and the air flow cannot take up the cold from the evaporator fast enough. Turning the compressor off and keeping the fan on will alow the room air to take up the cold.

Apr 22, 2014 | Frigidaire FAM157S1A Air Conditioner

1 Answer

I have new Samsung 1.5 Ton Window AC ( around one month old). Whenever AC is switched on in FAN or Cool mode the AC (probably FAn motor) make irritating Humming Noise. The noise slightly reduces after...

It is possible that your AC is not getting the right voltage or frequency and hence is trying to scavenge in gettting the current. It will be good if you can check on the mains voltage or on the wiring for a good 15 amp supply line. If there is any reduction or load onthe wire then the voltage can drop considerably. So in the first place kindly check this out. If this seems in order you will have to check for the fan or the compressor motor to be humming. If your cooling seems fine then you can check on the capacitor of the fan or the starter motor. I am sure since this is in warranty you must make a claim to get a free replacement. Hope you find my advice useful Good day

Aug 03, 2010 | Maytag M6Q10F2A Air Conditioner

1 Answer

My lg a/c only blows air with no cooling what is

possible a tstat problem or compressor is not coming on...put your ear by the ac unit...if you hear a buzzing noise ,then shuts off,humming...compressor not coming on...

May 09, 2010 | LG LB1200ER Air Conditioner

1 Answer

Carrier Compressor Issues?

When you shut it off and back on it slugged the compressor if you turn it off and back on before the pressures equalize between the high and low sides it will slug the compressor and it will not run should let sit for five minutes or so before restarting. The humming is either the compressor making noise usually common for the compressor to make some noise or the fan motor bearings are getting bad on the outside unit. If the unit works normal probably not much you can do till it breaks if it is the compressor it is more economical to replace the whole unit if it is just the fan motor it is worth changing. You could take an amp draw on the fan motor and the compressor to see if the are within the limits on the name plate of the outside unit.

Jan 25, 2010 | Air Conditioners

1 Answer

Unit is running, but is no longer cooling. Fan is blowing, but air is not chilled (or cold). Unit has been running fine until a couple days ago. It has been turned off for the last 12 hours and tried...

not sure if it is a package system or a split but this is what you do.go outside where your outdoor machine is, after it has been shut off for awhile, and you should hear 2 distinct noises.1 is the outdoor fan, you should see it spinning.the other is a comppressor hum.some compressors have noise bags on them so listen closely thru the fan noise.if you hear no hum listen for a hum about every 2 to 5 minutes.if you hear this hum every so often, chances are you compressor is seized or stuck.the only thing to do there is get a tech and try a big boost to get it going.

Aug 07, 2009 | Fedders A6P09S2A Air Conditioner

1 Answer

RV Rooftop AC Unit

Sounds to me like your fan is hitting something
Remove the cover and turn the fan by hand ( with the power off ! ) See what it is hitting

Oct 24, 2008 | Dometic Rooftop RV Air Conditioner

2 Answers

Outside unit will not operate

Sounds like a bad fan motor. Inside fan runs, compressor runs. Outside fan. Are your contactors pulled in when thermostat set on cool? If not might be a contactor. If contactor not pulled in touch the top of it with the end of a screwdriver. If fan spins turn unit off a buy a contactor...

Tip: Always make sure power at disconnect is off

Jun 10, 2008 | Carrier 38CKC042 Air Conditioner

Not finding what you are looking for?

Open Questions:

Frigidaire FAS155K1 Air Conditioner Logo

618 people viewed this question

Ask a Question

Usually answered in minutes!

Top Frigidaire Air Conditioners Experts


Level 3 Expert

4342 Answers


Level 3 Expert

1033 Answers

Dan Webster
Dan Webster

Level 3 Expert

8147 Answers

Are you a Frigidaire Air Conditioner Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides