How does dehydrator function work and is it safe?
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A low-temperature setting (typically 95-170F) on select air fryers that slowly removes moisture from food to create dried snacks like fruit chips, beef jerky, dried herbs, and yogurt drops. The dehydrator function lets families make preservative-free snacks at home with no added sugar or artificial ingredients.
Renee · Founder, R3
Also known as: Dehydrate Mode, Food Dehydrator Setting, Low-Temp Drying Function, Dry Function, Dehydrate Preset
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The dehydrator function is one of those features that families discover and then wonder how they lived without. It uses your air fryer's heating element and fan at low temperatures to slowly dry food - turning fresh fruit into chewy fruit chips, strips of meat into jerky, fresh herbs into dried seasonings, and yogurt into crunchy drops that kids love.
The appeal for families is clear: homemade snacks with zero preservatives, no added sugar, no artificial colors, and complete control over ingredients. We looked into how it works, which air fryers support it, and what families should know about the process.
Dehydration is essentially very low-temperature convection heating. The air fryer's heating element warms to a much lower temperature than normal cooking (95-170F instead of 300-400F), and the fan circulates this warm air around the food continuously for an extended period (4-12+ hours depending on the food).
The warm air does two things:
Over hours of continuous low-heat airflow, the food loses 80-95% of its water content. This dramatically extends shelf life (bacteria need moisture to grow), concentrates flavors, and changes the texture from soft to chewy or crispy depending on drying duration.
This is the same principle used by dedicated food dehydrators. The air fryer implementation uses the existing fan and heating element at reduced power, which means you do not need a separate appliance.
Different foods dehydrate best at different temperatures:
The lowest dehydration temperatures preserve the most flavor and nutritional content. Fresh herbs (basil, parsley, oregano, rosemary) dried at this temperature retain their essential oils and flavor compounds better than higher-temperature drying. At these low temperatures, the process takes 6-12 hours.
The sweet spot for most fruit and vegetable dehydration. Apple chips, banana chips, mango strips, strawberry slices, and yogurt drops all work well in this range. Lower temperatures (around 115F) are preferred by raw food enthusiasts who want to preserve enzymes. Standard fruit drying at 130-135F produces excellent results in 6-10 hours.
Popular family-friendly items at this temperature: - Apple chips (thin slices, 8-10 hours) - Banana chips (6-8 hours) - Mango strips (8-12 hours) - Strawberry slices (8-10 hours) - Yogurt drops (freeze yogurt drops on parchment first, then dehydrate for 6-8 hours) - Fruit leather (pureed fruit spread thin, 8-12 hours)
Meat dehydration requires higher temperatures for food safety. The USDA recommends heating meat to 160F (ground meat) or 165F (poultry) before or during the dehydration process to ensure pathogens are eliminated. This is a critical safety point - dehydrating meat at lower temperatures without first reaching safe internal temperatures can allow bacteria to survive.
Beef jerky is the most popular meat dehydration item. Thin strips of lean beef marinated overnight and dried at 160F for 4-6 hours produce shelf-stable jerky with your choice of seasonings and zero preservatives.
Not all air fryers include a dehydrator function. The feature requires:
Oven-style air fryers are the best candidates for dehydration. Their larger interior accommodates multi-layer racks, letting you dehydrate significant quantities across multiple levels. The interior height provides good air flow between rack levels. Most oven-style air fryers with a dehydrate preset have timers that extend to 12-72 hours.
Fewer basket-style models include a dedicated dehydrate function, but some higher-end models do. The limited interior space means smaller batches. If your basket-style air fryer reaches temperatures as low as 100-120F and has an extended timer, it can technically dehydrate, even without a dedicated preset.
This is where the dehydrator function really shines for families. Consider the alternative: store-bought fruit snacks and dried fruit from the grocery store typically contain:
Homemade dehydrated snacks contain exactly what you put in: the fruit, and nothing else. Apple chips are just apples. Mango strips are just mango. Yogurt drops are just yogurt (with whatever you add for flavor).
For families with children who have food sensitivities or allergies, this level of ingredient control is significant. You know exactly what is in every snack.
Dehydrating food is also a genuinely fun activity to do with kids old enough to help with preparation (the air fryer itself runs unattended):
Dehydrating runs the air fryer for many hours, which uses electricity. Here is a realistic cost estimate:
A typical air fryer in dehydrate mode draws 300-800 watts (much less than full cooking power). At average US electricity rates (about $0.16/kWh in 2025):
Homemade dehydrated snacks contain only the ingredients you choose - no added sugar, preservatives, artificial colors, or sulfur dioxide (common in commercial dried fruit). The main food safety concern is meat dehydration: the USDA recommends heating meat to 160-165F before or during drying to ensure pathogen elimination. Children under 5 are more vulnerable to foodborne illness from improperly prepared jerky. Fruit and vegetable dehydration does not carry significant food safety risks.
There are no specific regulations governing the dehydrator function in air fryers. The appliance itself must meet UL Listed safety standards. USDA Food Safety and Inspection Service provides guidance on safe home dehydration of meat and poultry. The FDA does not regulate home dehydration practices but provides general food safety guidance. Store-bought dehydrated foods are regulated by the FDA for labeling and safety.
Meat dehydration requires reaching 160-165F per USDA guidelines to ensure pathogen elimination. Under-dried food can develop mold during storage. The air fryer runs for many hours during dehydration - ensure it is on a stable surface with adequate ventilation clearance. Low-temperature operation is generally lower-risk than high-temperature cooking from a fire safety perspective, but the appliance should not be left running overnight without consideration for general safety.
Look for these
Watch out for
Freeze-drying (different technology requiring vacuum and extreme cold)Smoking or curing food (different preservation method)Standard high-temperature air frying performanceLong-term food preservation for emergency preparedness (dehydration extends shelf life but does not preserve indefinitely)
Set the dehydrate function to your target temperature and use a separate oven thermometer inside the cooking chamber to verify accuracy. Run a test batch of thinly sliced apples at 130F for 8 hours. Properly dried apple chips should be pliable, not sticky, with no wet spots. Temperature accuracy and consistent airflow are the key performance indicators.
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The air fryer's heating element operates at low power to maintain temperatures between 95-170F while the convection fan continuously circulates warm air around the food. This warm, moving air absorbs moisture from the food's surface and carries it away. As surface moisture evaporates, internal moisture migrates outward through capillary action, where it is also removed by the airflow. Over 4-12+ hours, the food loses 80-95% of its water content, dramatically changing its texture and extending shelf life by inhibiting bacterial growth.
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Not all. The air fryer needs to reach temperatures as low as 95-135F and maintain them accurately, plus have a timer that runs for 4-12+ hours. Many basic models have minimum temperatures of 180-200F and maximum timers of 30-60 minutes, which are insufficient for dehydration. Check the specifications before purchasing if this function is important to you.
Most fruit takes 6-10 hours at 130-135F depending on thickness and water content. Apple chips (thinly sliced) take 8-10 hours. Banana chips take 6-8 hours. Mango strips take 8-12 hours. Thinner slices dry faster. You want pliable, not sticky, results.
Yes, when made following USDA guidelines. The key is ensuring the meat reaches 160F (beef/pork) or 165F (poultry) before or during the drying process. The safest approach is briefly pre-cooking the meat at 275F for 10 minutes before dehydrating. This is especially important for families with young children.
At average US electricity rates ($0.16/kWh), an 8-hour dehydration session at 500W costs about $0.64. Compare this to $6-10 for a bag of organic dried fruit or $8-15 for quality jerky. The economics favor homemade dehydrated snacks significantly, especially for larger batches.
Oven-style air fryers with [multi-layer racks](/learn/technology/multi-layer-rack) are the best choice. Their larger interior and multiple rack positions let you dehydrate practical quantities across several levels. A basket-style air fryer can dehydrate small batches but the limited capacity may make it impractical for regular use.
Dehydrated fruits, vegetables, and herbs are safe for children who can handle chewy textures (typically age 2+ depending on the child and the food texture). Start with softer dried fruits and avoid hard, crunchy items for very young children due to choking risk. Homemade dried snacks are actually a healthier option than most store-bought snacks since they contain no added sugar, preservatives, or artificial ingredients.
The core heating technology behind all air fryers. A powerful fan circulates superheated air at high speed around food in an enclosed cooking chamber, creating a crispy exterior with minimal oil. It is the same principle used in convection ovens for decades, repackaged in a compact countertop form.
A larger countertop oven with an air fry function, featuring a front-opening door and wire racks. Offers more capacity (10 to 30+ quarts) and multiple cooking functions including bake, broil, toast, air fry, and dehydrate. Larger footprint and more accessible hot surfaces compared to basket-style models.
Compare this to the cost of store-bought organic dried fruit ($6-10 per bag) or quality beef jerky ($8-15 per bag), and the economics are very favorable, especially for larger batches across multiple rack levels.
This is a point that does not get enough attention. Temperature accuracy matters more at low dehydration temperatures than at high cooking temperatures. Here is why:
At 400F cooking temperature, being off by 10-15 degrees affects browning speed but does not fundamentally change the outcome. At 130F dehydration temperature, being off by 15 degrees means you are either at 115F (much slower drying, potentially unsafe for meats) or 145F (cooking the food rather than dehydrating it, changing texture).
Budget air fryers tend to have less precise temperature control, and this imprecision is more consequential at low temperatures. If dehydrating is a priority use case, choose a model with good temperature accuracy reviews.
This is the most important safety consideration with the dehydrator function. We cannot emphasize this enough for families making jerky:
The USDA recommends heating meat to 160F (beef/pork) or 165F (poultry) before or during the drying process. Some jerky enthusiasts dehydrate raw meat at lower temperatures, but this is not recommended for families with young children, who are more vulnerable to foodborne illness.
The safest approach for homemade jerky:
For fruit, vegetables, and herbs, food safety during dehydration is not a significant concern - the natural acidity and low protein content make bacterial growth unlikely at any dehydration temperature.
Properly dehydrated food stored correctly lasts a surprisingly long time:
Store in glass jars with tight lids or vacuum-sealed bags. Include a food-grade silica gel packet to absorb any residual moisture. Keep away from direct sunlight and heat sources.
The key to shelf life is thorough drying. Under-dried food retains enough moisture for mold growth. When in doubt, dehydrate a bit longer. Properly dried fruit should be pliable but not sticky. Jerky should bend without breaking but feel dry to the touch.
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