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Frymaster Fryer Troubleshooting

Frymaster Fryer Troubleshooting-Frymaster Logo

From fast food and QSRs to cafeterias and casual dining establishments, Frymaster makes world-class deep fryers for any commercial kitchen. Its line of gas and electric units are durable and efficient. If a rare issue pops from time to time, we got you covered. Below are helpful Frymaster fryer troubleshooting tips, so you can diagnose the problem quickly.

This guide covers various models, including Protector, 35, Electric Flatbottom and FilterQuick Series Fryers.

Heating, Control & Operational Issues

The following are diagnostic tips for troubleshooting heating, control and operational issues on Frymaster fryers.

Won't Heat

If the fryer isn't heating, check for the following:

  • Power cord unplugged – Plug the power cord in case it was knocked out of the outlet.
  • Open drain valve – If the drain safety valve is open, make sure it's fully closed.
  • Gas valve is off – On gas models, check that the valve is turned all the way to ON.
  • Faulty controller – This part will need to be checked or repaired by an authorized technician.
  • Faulty wiring – Contact an authorized technician to check wiring and circuitry. These issues could prevent the element from energizing.
  • Obstructed or faulty combustion air blower – If the blower is running, clean out the obstruction following the instructions in your operator's manual. If it's not running, call an authorized technician to repair.

Heats Until High-Limit Trips

If this occurs when the heat indicator light is on, there is a faulty temperature probe or controller. If the light is off, there is a faulty contactor or controller. Both issues will need to be checked and repaired by an authorized technician.

Cycles On & Off When Started

Cycling on and off occurs when melt-cycle mode is on, and this happens regularly. The mode allows controlled melting of solid shortening, prevent scorching and damage to the element. It continues until the unit reaches 180 degrees Fahrenheit.

Won't Display

If there is no display on the controller, see if the following are the cause:

  • No power – Check if the fryer is unplugged or the circuit breaker has tripped.
  • Computer is off – Turn the ON/OFF switch is to the ON position.
  • Component failure – The computer, wiring or another component are faulty. Contact an authorized technician to troubleshoot and repair.

Frypots Won't Top Off

On models with automatic top-off, check for the potential issues below:

  • Low fryer or oil temperature – The automatic top-off won't kick in until the unit reaches at least 300 degrees Fahrenheit. It also operates when oil is above 70 degrees Fahrenheit.
  • Supply line not connected to JIB – Make sure the supply line is in or connected to JIB.

Basket Lift is Noisy or Jerks

On models with basket lifts, the basket lift rod can cause jerking or noises when it's not lubricated. Apply a light coat of Lubriplate™ or similar lightweight grease to the rod and bushings.

Filtration Issues

The following are diagnostic tips for troubleshooting filtration issues on Frymaster fryers.

Pump Won't Start or Stops When Filtering

If the pump isn't starting or stops while filtering, check for the potential problems below:

  • No power – See if the power cord is unplugged or the circuit breaker is tripped.
  • Overheated pump motor – When the motor overheats, it causes the thermal overload switch to trip. Wait 20-45 minutes for the motor to cool down before pressing the pump's reset switch.
  • Obstruction in filter pump – To see if there is a blockage, close the drain valve and pull out the filter pan. Activate the pump and see if the motor hums and stops after a short amount of time. This confirms an obstruction. Clean the fryer of buildup. If this persists, contact an authorized technician to repair or remedy.

Oil Won't Return

If the oil isn't returning to the frypot while the filter runs, there could be an obstruction in the filter pan's suction tube. Check for a blockage by closing the drain valve, pulling out the filter pan and activating the pump. If the motor hums and stops after a short amount of time, this helps confirm an obstruction. Clean the fryer of buildup. If this problem persists, contact an authorized technician to repair or remedy.

Oil Returns Slowly & Bubbles

When the filter runs but oil return is slow and bubbly, check for the following:

  • Obstructed filter paper and/or screen – Change the filter paper or screen.
  • Incorrectly installed filter pan parts – See if the filter screen is at the bottom of the pan with paper on top of the pan. Adjust accordingly if necessary. Also, make sure the O-rings are connected and in condition. Adjust accordingly or replace them if worn out.
  • Oil isn't hot enough when filtering – Oil should be at or near 350 degrees Fahrenheit. Oil below that temperature is too thick to filter appropriately and could overheat the pump motor.

Display Shows IS VAT FULL?

If the display isn’t registering that the vat is full, try either of these:

  • Clean oil sensor - Clean the oil sensor of any build-up or debris.
  • Check the filter assembly - Check the filter assembly for any clogs/misplaced components.

Prompts Won’t Appear on Display

If the display doesn’t have prompts like CLEAN, POLISH, FILTER or DISPOSE there could be a few solutions: 

  • Check power status - Make sure that the controller is turned on and connected to power.
  • Wrong temperature - Check if the fryer is at 250°F(121°C) or at the proper set point.
  • Filter pan isn’t positioned - Look that the filter pan is in the correct position and fully inserted into the fryer.

Those are Frymaster fryer troubleshooting tips you need to know. For additional information, check out our Frymaster manuals online.

Please contact a local factory authorized service agent who can help with this specific unit and all your commercial kitchen equipment needs