- Appliances
- Air fryers
E1
Cosori E1 air fryer: open circuit in temperature monitor
Risk level
Medium
Proceed carefully and stop if the check is unclear.
Urgency
High
Quick answer
On Cosori Pro LE (CAF-L501 series) and Lite (CAF-LI401S) air fryers, Error Code E1 indicates an open circuit in the temperature monitor. Turn off and unplug the air fryer, let it cool without opening the housing, and contact Customer Support.
Safety first
Stop and check this first
- Do not try to open the top of the air fryer (it is not a lid) or bypass the temperature sensor when E1 appears: service by anyone other than Arovast voids the warranty and creates electrical hazards.
- Do not use the air fryer while it displays Error Code E1, and do not dispose of the appliance before contacting Cosori Customer Support with your invoice and order ID.
Safe checks you can perform
- Turn off, unplug and cool the air fryer displaying E1
- Confirm that the display code is E1 rather than E2 or E3
- Gather your invoice and order ID without opening the housing
Leave these tasks to a qualified professional
- Do not attempt this professional task: Match Error Code E1 to the Cosori model manual and inspect externally
- Do not attempt this professional task: Route E1 service or exchange through Arovast Customer Support
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Match Error Code E1 to the Cosori model manual and inspect externally
What they doThe technician confirms the CAF-L501 or CAF-LI401S model series, verifies with the unit unplugged and cool that the cord and plug have no external damage, and logs E1 as an open circuit in the temperature monitor.
They must show youthe E1 entry in the official Troubleshooting table and the external condition of the unplugged appliance.
In writingCosori model number, confirmed E1 open-circuit code, and instruction not to operate the unit.
Route E1 service or exchange through Arovast Customer Support
What they doThe professional submits the E1 fault to Cosori Customer Support with the invoice and order ID, avoiding any unauthorized opening or internal repair that would void the limited warranty.
They must show youthe official Customer Support contact requirements and warranty terms applicable to Error Code E1.
In writingCustomer Support referral for E1, order ID and purchase date, and confirmation that the housing remains unopened.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Turn off, unplug and cool the air fryer displaying E1
- Who:
- you, at your Cosori CAF-L501 or CAF-LI401S series air fryer.
- How:
- turn off and unplug the air fryer from the outlet, then carefully pull out the basket onto a heat-resistant surface, watching for hot steam, so the unit cools completely.
- Result that matters:
- place the appliance in a safe, unpowered state after Error Code E1 appears.
- If the air fryer is unplugged and completely cool:
- proceed to record the details for E1 support.
- If the basket or cavity is still hot after E1:
- let it cool completely before you handle it.
- Evidence to keep:
- Error Code E1 shown on the display and the exact model number of your Cosori unit.
Evidence: Cosori Pro LE 5.0-Quart Air Fryer CAF-L501-KUS User Manual · Cosori Pro LE 4.7 litros Freidora por aire Serie CAF-L501 Manual del usuario · Cosori Lite 3.8 litros Freidora por aire inteligente CAF-LI401S Manual del usuario
Confirm that the display code is E1 rather than E2 or E3
- Who:
- you, checking the exact message on the control screen.
- How:
- verify that the screen shows Error Code E1 (open circuit in the temperature monitor) rather than E2 (short circuit in the temperature monitor) or E3 (overheat protection has activated).
- Result that matters:
- match the exact fault code listed in Cosori’s Troubleshooting table.
- If the code is confirmed as E1:
- keep the unit unplugged and prepare to contact Customer Support.
- If the screen actually displays E3:
- turn off, unplug and allow the air fryer to cool completely.
- Evidence to keep:
- exact code recorded from the control screen before unplugging.
Evidence: Cosori Pro LE 5.0-Quart Air Fryer CAF-L501-KUS User Manual · Cosori Pro LE 4.7 litros Freidora por aire Serie CAF-L501 Manual del usuario · Cosori Lite 3.8 litros Freidora por aire inteligente CAF-LI401S Manual del usuario
Gather your invoice and order ID without opening the housing
- Who:
- you, preparing a warranty or support request for Cosori.
- How:
- locate your copy of the invoice and order ID as requested in the Customer Support section, and do not try to open the top of the air fryer or modify the unit.
- Result that matters:
- have the required proof of purchase ready for Arovast Customer Support.
- If you have your invoice and order ID ready:
- contact Cosori Customer Support regarding Error Code E1.
- If you are still locating the order ID:
- do not dispose of the product before contacting Customer Support.
- Evidence to keep:
- order ID, date of purchase, and the E1 error code report.
Evidence: Cosori Pro LE 5.0-Quart Air Fryer CAF-L501-KUS User Manual · Cosori Pro LE 4.7 litros Freidora por aire Serie CAF-L501 Manual del usuario · Cosori Lite 3.8 litros Freidora por aire inteligente CAF-LI401S Manual del usuario
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Appliances
- Brand
- Cosori
- Product type
- Air fryers
Known code variants
- aire acondicionado Carrier E1
- ALFA Crea E1 error
- ALFA Duo presser foot lifter position error
- ALFA E1
- Aviso E1
- Bosch E1
- cabezal tado E1
- calentador Junkers E1
- Carrier AC E1
- Carrier E1
- Carrier E1 error
- Carrier mini split E1
- Carrier XPower E1
- Cecofry E1 code
- Cecotec ForceClima E1
- Cecotec portable AC E1 code
- Circuito abierto en monitor de temperatura
- Code E1
- Código de error E1
- Código E1
- codigo E1 aire acondicionado Cecotec
- Código E1 Cecofry
- Cosori E1
- Culligan E1
- Culligan ERR 1
- Culligan softener E1
- descalcificador Culligan E1
- Display E1
- Display shows Error Code E1
- E 1
- E-1
- E01
- E1
- E1 cestillo izquierdo
- E1 common wire required
- E1 fan error
- E1 left basket sensor
- E1 on display
- E1 sensor de temperatura
- E1 temperature sensor
- E2
- E3
- E4
- Electrolux ELAC309W E1
- Electrolux washer E1
- Electrolux washing machine error E1
- Elevador de prensatelas posición incorrecta
- EMPTY GRATE AND PRESS ON-OFF
- ERR 1
- ERR1
- Error 1 Culligan
- Error Code E1
- Error E1
- error E1 ALFA Crea
- error E1 calefón Rheem
- error E1 calentador Rheem
- error E1 Carrier
- error E1 lavarropas Electrolux
- error E1 lavavajillas Midea
- error E1 lavavajillas Smeg
- error E1 lavavajillas Teka
- error E1 purificador Philips
- error E1 sensor temperatura tubo Cecotec
- error E1 tado calibración
- falla de encendido E1 Rheem
- falla E1 lavadora Electrolux
- Fallo del motor E1
- Fallo del sistema de bloqueo
- ForceClima 12850 Style E1
- ForceClima 7900 SmartTouch E1
- ForceClima 9900 SmartTouch E1
- ForceClima E1 tube condenser sensor fault
- Hydronext 5600S E1
- Hydronext 5700S E1
- Junkers E1
- Junkers water heater E1
- La pantalla muestra el código de error E1
- lavavajillas Midea E1
- lavavajillas Smeg aguastop E1
- Levoit E1 motor malfunction
- Lock system fault
- MDWEB1004LS E1
- MFD45S200 E1
- Midea dishwasher E1
- Midea dishwasher error E1
- Midea E1
- minisplit Carrier E1
- Nest E1
- Nest E1 C wire
- Nest E1 cable C
- Nest thermostat E1
- Open circuit in temperature monitor
- Philips AC3033 E1
- Philips AC3036 E1
- Philips AC3039 E1
- Philips air purifier E1
- Philips E1
- Philips Series 3000i E1 motor malfunction
- Posición del prensatelas posición incorrecta
- Presser foot lifter wrong position
- purificador Philips E1
- Rheem E1
- Rheem gas water heater E1
- Rheem ignition failure E1
- Rheem R7-14L E1
- Smeg Aquastop failure
- Smeg avería aguastop
- Smeg dishwasher anti-flooding E1
- Smeg dishwasher E1
- Smeg dishwasher error E1
- Smeg lavavajillas E1
- Smeg LVFABCR3 E1
- tado Basic dos rayas llave inglesa
- tado Basic two dashes spanner
- tado E1
- tado E1 calibration error
- tado radiator thermostat E1
- tado Smart Radiator Thermostat E1
- tado° E1
- Teka dishwasher E1
- Teka dishwasher error E1
- Teka DW8 E1
- Teka lavavajillas E1
- Teka LP8 E1
- termostato Nest E1
- Warning E1
What it means
Cosori’s User Manuals for the Pro LE 5.0-Quart / 4.7-Litre Air Fryer (CAF-L501 series) and the Lite 3.8-Litre Smart Air Fryer (CAF-LI401S) state in their Troubleshooting tables that when the display shows Error Code “E1”, there is an open circuit in the temperature monitor and you should contact Customer Support. Other Cosori air fryer models may use different code formats. Error Code E1 by itself never proves which specific component has failed.
Warnings and stop conditions
- Highsource verified
Do not try to open the top of the air fryer (it is not a lid) or bypass the temperature sensor when E1 appears: service by anyone other than Arovast voids the warranty and creates electrical hazards.
Evidence: Cosori Pro LE 5.0-Quart Air Fryer CAF-L501-KUS User Manual · Cosori Pro LE 4.7 litros Freidora por aire Serie CAF-L501 Manual del usuario · Cosori Lite 3.8 litros Freidora por aire inteligente CAF-LI401S Manual del usuario
- Mediumsource verified
Do not use the air fryer while it displays Error Code E1, and do not dispose of the appliance before contacting Cosori Customer Support with your invoice and order ID.
Evidence: Cosori Pro LE 5.0-Quart Air Fryer CAF-L501-KUS User Manual · Cosori Pro LE 4.7 litros Freidora por aire Serie CAF-L501 Manual del usuario · Cosori Lite 3.8 litros Freidora por aire inteligente CAF-LI401S Manual del usuario
Symptoms and causes
Probable causes · in order
- Open circuit detected in the temperature monitorCommon
The Troubleshooting section of the CAF-L501 and CAF-LI401S manuals defines Error Code E1 as an open circuit in the temperature monitor.
Evidence: Cosori Pro LE 5.0-Quart Air Fryer CAF-L501-KUS User Manual · Cosori Pro LE 4.7 litros Freidora por aire Serie CAF-L501 Manual del usuario · Cosori Lite 3.8 litros Freidora por aire inteligente CAF-LI401S Manual del usuario
- Appliance malfunction requiring authorized support handlingPossible
Cosori’s Important Safeguards instruct owners not to use the air fryer if it is not working properly and to contact Customer Support instead.
Evidence: Cosori Pro LE 5.0-Quart Air Fryer CAF-L501-KUS User Manual · Cosori Pro LE 4.7 litros Freidora por aire Serie CAF-L501 Manual del usuario · Cosori Lite 3.8 litros Freidora por aire inteligente CAF-LI401S Manual del usuario
Virtual technician
Does E1 still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
Cosori Pro LE 5.0-Quart Air Fryer CAF-L501-KUS User Manual
Cosori · 2026 · official_doc
- 2
Cosori Pro LE 4.7 litros Freidora por aire Serie CAF-L501 Manual del usuario
Cosori · 2026 · official_doc
- 3
Cosori Lite 3.8 litros Freidora por aire inteligente CAF-LI401S Manual del usuario
Cosori · 2026 · official_doc
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