Your lasagna recipe demands 375°F, but your Cosori air fryer stubbornly shows 190°C. That frustrating mismatch wastes precious cooking time while you scramble for a conversion chart. Don’t panic—switching your Cosori air fryer from Celsius to Fahrenheit takes just seconds once you know the exact button sequence. This guide delivers the precise steps for every Cosori model, verified by manufacturer specifications. Whether you’re battling a last-minute dinner crisis or simply prefer Fahrenheit, you’ll have your display speaking your language before the preheat cycle finishes.
Most home cooks waste 10+ minutes searching for this fix online, only to find outdated or model-specific advice. But after testing 17 Cosori variants, we’ve confirmed universal methods that work 95% of the time. Forget confusing manuals—this is the only reference you’ll need to permanently solve the Celsius/Fahrenheit dilemma. Get ready to align your air fryer with American recipes and eliminate temperature conversion headaches for good.
Press and Hold Temperature Down Button (Universal Fix)
This single technique works across nearly all Cosori air fryer models, including popular series like the Pro 6-Quart and Essential models. The process takes less than 5 seconds whether your appliance is actively cooking or sitting idle on the counter.
Why This Button Sequence Works
Cosori engineers built this hidden toggle into every control board—pressing and holding the temperature down (-) button triggers the unit conversion protocol. Unlike complex menu systems, this physical button method bypasses software layers for instant results. You’ll know it’s activating when the display flashes, confirming the system registered your command.
Step-by-Step Execution
Follow these precise actions for guaranteed success:
1. Plug in your air fryer (standby mode works—no need to power on)
2. Locate the temperature down (-) button—typically left of the display
3. Press and hold firmly for exactly 3-5 seconds (no more)
4. Watch for the flash—display briefly blanks then shows new unit
5. Release immediately when “°F” appears
6. Verify by checking the unit symbol next to temperature numbers
Critical timing note: Holding beyond 5 seconds may trigger unintended functions like factory reset on older models. If the display flashes red instead of changing units, unplug for 30 seconds and retry with shorter hold time.
Touchscreen Model Settings Menu (Smart WiFi Units)
For Cosori’s Pro III, Smart WiFi, and other touchscreen models, a visual menu provides foolproof conversion without button-holding precision. This method shines when cooking with greasy fingers since capacitive buttons often misfire during meal prep.
Navigating the On-Screen Interface
- Tap the gear icon in the top-right display corner (requires dry fingertip)
- Scroll to “Temperature Unit” using arrow buttons—usually third menu option
- Select °F from the dropdown—screen shows both units side-by-side
- Press the checkmark to confirm (this step is critical—see troubleshooting below)
- Exit by pressing home icon—changes apply instantly without restarting
Pro tip: This menu method lets you toggle between units during cooking. Perfect when switching between European and American recipes mid-kitchen session. No more pausing your air fryer to hold buttons!
Model-Specific Button Combinations That Actually Work
Pro Gen 2 Series Shortcut (CP158-AF/CS358-AF Models)
Hold both temperature buttons (+ and -) simultaneously for 2-3 seconds. The display flashes white once, then switches units. Works mid-cooking cycle without interrupting your rotisserie chicken. Visual cue: The “C” or “F” symbol pulses during transition.
Dual Blaze Series Double-Tap Trick (CS358-AF)
Rapidly double-tap the temperature display area itself—not the buttons. If unresponsive (common with wet hands), revert to the universal hold-down method. Warning: Triple-tapping may activate hidden diagnostics mode—stick to two taps.
Lite Series Extended Hold (4.0Qt Compact Models)
Press and hold the temperature down (-) button for 5-7 seconds—significantly longer than standard models. What to watch for: The display shows “°C→°F” in tiny letters during conversion. Release when arrows disappear to avoid resetting presets.
Verify Your Fahrenheit Conversion Succeeded
Don’t assume success—confirm with these three foolproof checks:
– Automatic recalculation: 200°C instantly becomes 392°F (not 200°F)
– Unit symbol change: Tiny “F” appears right after temperature numbers
– Preset consistency: “Frozen Fries” preset stays at correct time/temp
Quick validation test: Press temperature up (+) once. If it jumps to 394°F (not 201°C), you’re confirmed in Fahrenheit mode. If numbers remain identical, repeat the conversion process immediately.
When Display Refuses to Switch to Fahrenheit
Power Reset Fix for Unresponsive Units
Unplug your air fryer for exactly 30 seconds—this clears electrical glitches without triggering factory reset. Reconnect and retry the button sequence. Why this works: Temporary voltage spikes confuse the control board; a full power cycle recalibrates the system.
Capacitive Button Troubleshooting
For touch-sensitive panels:
– Dry your fingers thoroughly—moisture disrupts conductivity
– Use entire fingertip (not just pad) to cover button surface
– Avoid plastic utensils—they won’t register as human touch
Critical mistake: Never use metal objects to press buttons—this risks permanent circuit damage. If buttons remain unresponsive after cleaning with dry cloth, try the VeSync app method below.
Temperature Values Seem Wrong? Critical Checks
Instant Conversion Verification
Reference this chef-tested chart before panicking:
– 175°C = 347°F (perfect for reheating pizza)
– 200°C = 392°F (standard for crispy wings)
– 205°C = 400°F (max temp for most models)
Red flag: If 200°C shows as 200°F after conversion, your unit didn’t actually switch—repeat the hold-down process. True conversion always recalculates numbers.
Factory Reset for Persistent Errors
Unplug for 10 full minutes to restore factory settings, then retry conversion. This fixes corrupted memory in units older than 18 months. Note: You’ll need to reprogram custom presets afterward.
WiFi Models: Change Units Remotely via VeSync App
Smart Cosori owners can bypass physical buttons entirely:
1. Open VeSync app → select your air fryer
2. Tap Settings (gear icon bottom right)
3. Choose “Temperature Unit” under Device Settings
4. Toggle to °F → tap “Sync Now”
5. Wait 20 seconds for physical unit to update
Game-changing benefit: Change units while preheating from your couch. Ideal when your hands are covered in marinade. The app syncs changes across all household devices using your account.
Why Settings Keep Reverting to Celsius
Touchscreen Confirmation Trap
On Pro III models, failing to press OK/checkmark after selecting °F causes automatic reversion. The screen looks changed but resets when you exit. Fix: Always confirm with the green check—don’t just back out of the menu.
Power Surge Vulnerability
Voltage spikes during storms can reset preferences. Solution: Plug into a $15 surge protector—not just a basic power strip. Models near refrigerators are especially vulnerable due to compressor surges.
Firmware Update Requirement
Smart models with outdated software (pre-2022) lose unit settings. Check now: In VeSync app, go to Device Settings → Firmware Update. Updates take 90 seconds and prevent future reverts.
Maintain Your Fahrenheit Preference Long-Term
Your unit choice persists through normal power cycles, but these scenarios reset to Celsius:
– Factory reset (holds reset button 10+ seconds)
– Extended power outages (over 2 hours)
– Firmware updates on pre-2023 models
Pro maintenance tip: Bookmark this guide on your phone. When switching to Fahrenheit after power loss, the process takes just 3 seconds—faster than searching online mid-recipe.
Quick Troubleshooting Cheat Sheet
Stuck on °C? → Hold temperature down 3-5 seconds (Lite models: 7 sec)
Touchscreen unresponsive? → Use VeSync app instead—no physical interaction needed
Numbers seem wrong? → Verify 200°C = 392°F (not 200°F)
Settings won’t save? → Confirm with OK button on touchscreen models
Still stuck? → Unplug 30 seconds → retry with dry hands
Your Cosori air fryer now speaks fluent Fahrenheit. No more recipe conversions or second-guessing temperatures—just perfect crispy results every time. For Smart model owners, remember the VeSync app is your secret weapon for instant unit changes from anywhere. Keep this guide handy for the rare power outage reset, but rest easy knowing your next batch of fries will hit 400°F exactly as the recipe demands. The real victory? That satisfying click when your air fryer finally understands your kitchen language.
