The towel care label sets the upper limit
General towel guides often mention warm or hot washing, but not every towel is the same. Decorative borders, dark dyes, microfiber constructions and blended fibers can change the safe temperature. Start with the label rather than a fixed household rule.
Temperature is only one part of towel cleaning
Load the washer loosely enough for towels to move and rinse. Separate incompatible colors and avoid mixing lint-heavy towels with items that easily collect lint. Use the detergent dose appropriate for the load and washer.
When a hotter setting is not allowed
If the care label limits the towel to a cooler wash, respect that limit. More heat is not a substitute for a suitable cycle, adequate detergent, enough rinsing and prompt drying.
Dry completely
Transfer towels promptly after washing and use the care-label-approved dryer temperature or air-dry method. Repeated overdrying can affect feel and fabric life, while storing damp towels can contribute to musty odor.
Garment care labels, appliance manuals and laundry-product directions can be more specific than a general guide. Use them when they set a tighter limit.