Henny Penny Model 591 (electric) and 691 (gas) pressure fryers

Four-head pressure fryers with a digital timer/temperature control. A fault shows as an E- code with an alarm tone; any button silences it.

What it is: Pressure fryer. PFE-591 is electric, PFG-691 is gas. Codes match except E-20 (gas ignition only) and E-26 (electric only).

Error codes ↓
Enter service mode ↓

Henny Penny Model 591 (electric) and 691 (gas) pressure fryers error codes

Code	Meaning	Likely cause	What to do
E-4	Control board too hot	Blocked side louvers or cooling fan not running	Switch off and on. Clear the louvers and check the fan. Replace the control if it stays.
E-5	Oil too hot	Heat circuit stuck on or bad probe	Switch off and on; check the heating circuit and probe.
E-6A	Temperature probe open	Probe or wiring broken	Check the probe.
E-6B	Temperature probe shorted	Probe or wiring shorted	Check the probe.
E-10	High limit tripped	Overheat	Let it cool, then push up the red reset on the high limit. Replace it if it will not reset.
E-15	Drain switch	Drain open or microswitch fault	Close the drain handle; check the switch.
E-20A	Air pressure switch stuck closed (691)	Switch fault	Press the timer button to retry ignition; call service if it stays.
E-20B	Combustion fan or air switch stuck open (691)	Fan or switch fault	Retry ignition as above.
E-20C	Ignition module failure (691)	Module fault	Retry ignition as above.
E-20D	Modules working but no flame (691)	Gas supply, igniter or flame sensing	Retry ignition as above.
E-26	Heat on when it should be off (591)	Shorted element, stuck contactor or failed sensor	Check elements, contactor and sensor.
E-41 / E-46	Programming failure / memory write error	Control memory	Switch off and on, then re-initialise the control. Replace it if it stays.
E-47	Analog converter or 12 V supply fault	I/O board or control board	Switch off and on; replace the I/O or control board.
E-48	Input system error	Control cannot read its buttons	Re-initialise; replace the control.
E-70B	Power switch fault	Switch, its wiring or I/O board	Check the switch and wiring.
E-92	24 V fuse on I/O board open	Short in the 24 V circuit (high limit, drain switch)	Find the short, then replace the fuse.

How to enter service / parameter mode

Level 2 programming: hold the PROGRAM button about 5 s and let go when LEVEL 2 appears.

Notes

Re-initialising the control resets it to factory settings; write down the product settings first.

For licensed technicians only. This equipment can involve mains voltage, high-voltage microwave circuits, gas and refrigerant. Isolate power (and gas) before opening panels, follow the manufacturer's manual and your local licensing rules (for example ARC refrigerant handling and electrical or gas licences). Wrong settings can spoil food or damage equipment. Check every value on the unit in front of you before changing it.

Based on: Henny Penny PFE-591 and PFG-691 technical manuals. Always check the manual for your exact model and software version.

ServiceModes is not affiliated with Henny Penny or any other manufacturer. Written in our own words from the manufacturer's documentation.