WT4870CW - LG Washing Machine Service Manual (repair manual). Page 29

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29
Many washing problems involve poor soil and stain removal, residues of lint and scum, and fabric damage. For
satisfactory washing results, follow these instructions.
Use ONLY powdered or liquid HE (High Effificiency) detergents. Do NOT use flakes scraped from a soap 
cake or bar, flakes, soap ribbons (available in some markets,) detergent tablets, plastic pouches, magic 
laundry balls, or anything other than powdered or liquid HE detergent products. Do not use soap of any kind. 
Do not use other types of detergent or soap products, such as hand soap, dishwashng liquid, or any others. 
4-4. TROUBLESHOOTING BY COMMON WASHING PROBLEMS
WASHING PROBLEM
Problems  
Poor soil
removal
Blue Stains
Black or gray
marks on
clothes
Yellow or
brown rust
stains
Lint
Residue or
Detergent
Holes, tears,
or snags
Possible Causes
· 
Insufficient detergent
· 
Wash water temperature too low
· 
Incorrect wash cycle
· 
Laundry missorted
· 
Stains not properly pretreated
· 
Undiluted fabric softener 
dispensed directly onto fabric
· 
A buildup caused by the interaction 
of fabric softener and detergent 
can flake off and mark clothes
· 
Not enough detergent
· 
Iron or manganese in water 
supply, water pipes, or water 
heater
· 
Incorrect sorting
· 
Tissues left in pocket
· 
Overloading the washer
· 
Overloading the washer
· 
Undissolved detergent
· 
Excessive detergent
· 
Incorrect use of chlorine bleach.
· 
Unfastened zippers, hooks, 
buckles
· 
Ribs, tears and broken threads
· 
Overloading the washer
· 
Degradation of fabric
Solutions and Preventive Measures
· 
Use correct amount of detergent for load size, amount of soil and 
water hardness.
· 
Use WARM or HOT water for normal soil. Different water 
temperature may be required according to soil type. (refer to page 10)
·
Reduce load size.
· 
Wash with heavy or soak & heavy wash cycle for heavy soiled 
laundry.
·
Separate heavily soiled items from lightly soiled ones.
· 
Pretreat stain and heavy soil according to directions shown on 
page 15.
·
Pretreat the stain with detergent or a stain removal agent.
· 
Do not overfill fabric softener dispenser and do not pour liquid fabric 
softener directly onto fabric. 
See page 13 for more instructions.
·
Keep the recommendations against scum (waxy buildup).
· 
Use correct amount of detergent for load size, soil level,  
and water hardness.
· 
To restore discolored load of whites, use rust remover safe for 
fabric.
· 
Install nonprecipitating water softener or an iron filter in your 
water supply system for an ongoing problem.
·
Before washing, run water for a few minutes to clear lines.
· 
Wash lint-producing items, like flannel sheets, towels, and the like 
separately from dark fabrics and fabrics that tend to collect lint. 
Remove all items, including tissues and papers, from the pockets of 
items to be washed. See page 9 for sorting information. 
·
Do not overload the washer.
·
Do not overload the washer.
· 
Some detergents need to be pre-dissolved, check the 
detergent instructions. Try pre-dissolving the detergent.
·
Increase water temperature using HOT water safe for fabric.
·
Use proper amount of detergent.
· 
Never pour chlorine bleach directly on fabric. 
See page 11 for adding liquid bleach.
·
Fasten zippers, hooks, and buckles.
·
Remove objects in pockets. See page 9 for caring before loading.
·
Do not overload the washer.
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