How to Clean and Maintain Your Commercial Deep Fryer

A well-maintained commercial deep fryer is essential for ensuring the quality of your fried foods and the longevity of the equipment. Regular cleaning and proper maintenance not only contribute to the taste of your dishes but also prevent safety hazards.

How to Clean and Maintain Your Commercial Deep Fryer

This comprehensive guide provides step-by-step instructions on how to clean and maintain your commercial deep fryer effectively.

1. Daily Cleaning Routine 

a. Oil Filtration

  • Begin by filtering the oil at the end of each day. Use a fine mesh strainer or an oil filtration system to remove food particles and debris. This extends the life of the oil and ensures a cleaner fryer.

b. Wipe Exterior Surfaces

  • Wipe down the exterior surfaces of the deep fryer with a damp cloth. This removes any grease or oil splatters, maintaining a clean and safe kitchen environment.

c. Clean Fryer Baskets

  • Remove and clean the fryer baskets daily. Soak them in warm, soapy water and use a brush to scrub away any residue. Rinse thoroughly and allow them to air dry.

2. Weekly Cleaning Routine

a. Turn Off and Cool Down 

  • Before beginning the weekly cleaning routine, ensure the deep fryer is turned off and has cooled down completely. This is crucial for safety.

b. Empty the Oil 

  • Drain and empty the oil from the fryer into a suitable container. Be sure to follow proper disposal regulations for used cooking oil in your area.

c. Scrub Interior Surfaces

  • Using a soft brush or sponge, scrub the interior surfaces of the fryer with a mixture of warm water and mild detergent. Pay special attention to areas with built-up grease.

d. Remove and Clean Heating Elements

  • If possible, remove the heating elements and clean them separately. Wipe away any accumulated residue, ensuring they are free from grease.

e. Check for Clogs

  • Inspect the drain valve and other openings for any clogs. Clear any obstructions to maintain proper oil flow and prevent potential damage.

f. Clean the Exterior

  • Wipe down the exterior of the deep fryer with a damp cloth. For stainless steel surfaces, use a mild stainless steel cleaner to maintain a polished appearance.

3. Monthly Deep Cleaning 

a. Boil Out the Fryer 

  • Perform a monthly "boil out" to remove built-up grease and carbon deposits. Fill the fryer with water and a commercial fryer cleaner. Heat the solution to a boil, then let it cool before draining.

b. Inspect Thermostats and Controls 

  • Check thermostats and controls for accuracy. Calibrate if necessary, or replace any faulty components. Properly functioning controls are vital for maintaining consistent frying temperatures.

c. Check Gas Lines 

  • For gas fryers, inspect gas lines for leaks. Ensure that all connections are secure and that there are no signs of wear or damage.

4. Safety Precautions

a. Wear Protective Gear 

  • When cleaning the fryer, wear protective gear such as gloves and safety goggles. Hot oil and cleaning chemicals can cause harm, so taking precautions is crucial.

b. Ventilation

  • Ensure proper ventilation in the kitchen area. Adequate airflow helps dissipate fumes and prevents the buildup of heat.

5. After-Cleaning Checks 

a. Refill with Fresh Oil 

  • After cleaning, refill the fryer with fresh oil. Ensure it is at the recommended level and that there are no signs of oil leaks.

b. Test Operation 

  • Before resuming regular use, test the fryer's operation. Heat the oil to the desired temperature and check for any irregularities.


In conclusion, a clean and well-maintained commercial deep fryer is not only essential for food quality but also for the safety of your kitchen. Following these cleaning and maintenance guidelines will help you uphold the highest standards in your commercial kitchen operations. Regular attention to your deep fryer ensures that it continues to deliver crispy and delicious results every time.