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If the pump starts after resetting the thermal overload switch, then something is causing the motor to
overheat. A major cause of overheating is when several frypots are filtered sequentially, overheating
the pump and motor. Allow the pump motor to cool at least 30 minutes before resuming operation.
Pump overheating can be caused by:
• Solidified shortening in the pan or filter lines,
or
• Attempting to filter unheated oil (cold oil is
more viscous, overloading the pump motor and
causing it to overheat).
If the motor runs but the pump does not return oil, there
is a blockage in the pump. Incorrectly sized or
installed paper/pads will allow food particles and
sediment to pass through the filter pan and into the
pump. When sediment enters the pump, the gears bind,
causing the motor to overload, again tripping the
thermal overload. Shortening that has solidified in the
pump will also cause it to seize, with the same result.
A pump seized by debris or hard shortening can usually
be freed by manually moving the gears with a
screwdriver or other instrument.
Disconnect power to the filter system, remove the input plumbing from the pump, and use a
screwdriver to manually turn the gears.
● Turning the pump gears in reverse will release a hard particle.
● Turning the pump gears forward will push softer objects and solid shortening through the
pump and allow free movement of the gears.
Incorrectly sized or installed paper/pads will also allow food particles and sediment to pass through
and clog the suction tube on the bottom of the filter pan. Particles large enough to block the suction
tube may indicate that the crumb tray is not being used. Pan blockage can also occur if shortening is
left in the pan and allowed to solidify. Blockage removal can be accomplished by forcing the item
out with an auger or drain snake. Compressed air or other pressurized gases should not be used to
force out the blockage.
1.9.2 Replacing the Filter Motor, Filter Pump, and Related Components
1. Remove the filter pan and lid from the unit. Drain the frypot into a Shortening Disposal Unit
(SDU) or other appropriate metal container.
DANGER
DO NOT drain more than one full frypot or two split frypots into the SDU at one time.