My window air conditioner makes a loud cracking-ice breaking sound when runs awhile with little cold air

sounds like motor bad.

i have had units turned too cold and ice forms on coils. shut unit down and take it out of window. turn /tilt and when all water runs out, re install and turn back on to a Higher , less cold setting.

Hello, most likely the fan blade is either loose or cracked at the hub causing the blade to hit the fan shroud. You will either have tighten the fan blade or have to get a replacement.

it sounds like ice built up arounnd the fan blade probably from leaving the bottom freezer door open and warm air got in and froze up the air ducts or you have a defrost problem but if you hear a cracking sound it sounds like the heater is coming on but can't melt out all the ice.try this,take out all the food out of the freezer,unplug it,get a hair dryer and blow the hot air at the back wall where the vent holes are and melt out all the ice,when you look into the vent holes and don't see anymore water dripping down you can plug it back in and with your hand feel to see if you can feel the air blowing into the fridge section,if you feel the air then you melted out the ice and if the noise is gone then the evap fan motor is still good,if there's alot of ice and snow on the back wall you should remove the panel and then melt out all the ice with the hair dryer.also if you have another fridge you can unplug the fridge and let it melt out on it's own for like a day

REPLACE THERMOSTATE,SHOULD WORK.

the unit running all the times sounds like a faulty thermostat which is saying its still hot when its not.try finding thermostat make sure all plugs are in all the way on the circuit board. does it run all the time on heating? the iceing up would just because its running all the time. i

mcdevito75 here, Have your A/C looked at by your local A/C repair shop. Sounds like the compressor is makeing the noise (expensive repair if so)

clean the filters and check the drain, to clear the drain run a jug of warm water down the pipe

Yes, it certainly can be, especially in high humidity. Run AC just about 1/4 way from max and crack the windows. The ac will work better and ice up less.

Its refrigerant gas has leaked out so ice is forming on the evaporator which breaks and causes this cracking sound. The same is resulting in less cooling as well. Get the refrigerant gas pressure checked and fixed.