We have a goldstar 10000BTU window air conditioner. It works great most days...But if it is left on for long periods of time the inside ices up, and it won't blow cold air anymore....Why is it icing up??
Needs to be taken apart and clenaned
Dirty coils (i'm sure you already cleaned the filter ). The coils over time (Behind the filter) get some dust and dirt trapped in between the fins and restrict air flow causing icing for the coils. Do not wipe the fins as they will bend over restricting air floe and you may ruin the unit. You should clean the coil with degreaser (Detergent type) and you usually have to take it out of the window and take it out of the metal cabinet to wash the coils.
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