Frymaster E87 Error Code
Right/central return valve not open. Commanded open but confirmation is missing; filtration and top-off disabled. Call service.
Source: Frymaster FQ4000/M4000 Service Manual (819-7955)
What does Frymaster E87 mean?
On FQ4000 battery configurations with three return valves (left, right/central, and right), E87 indicates the right or central return valve was commanded open during filtration return and position confirmation was not received. The right/central valve routes filtered oil back to the center or right vat in the battery. Filtration and top-off are halted. The diagnostic approach is identical to E85 but for the right/central valve position.
Symptoms
- Display shows E87 during the filtration return phase.
- Filtered oil does not return to the right or central vat.
- Right/central vat oil level is low after filtration — oil remains in the filter pan.
- Filtration and top-off disabled across affected vats.
Common causes
- Right/central return valve actuator motor failed or mechanically jammed.
- Open-position feedback switch on the right/central return valve misaligned or failed.
- VIB board wiring fault on the right/central valve circuit.
- Grease or debris blocking the valve from opening fully.
- VIB board failure.
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Diagnostic steps
Use component check to command the right/central return valve
Navigate to component check on the FQ4000 and command the right/central return valve open. Observe actuator response and feedback receipt.
Inspect the right/central return valve actuator
With power off and oil cooled, inspect the actuator for grease buildup, stripped gears, or motor failure. Attempt to manually cycle the valve.
Test the open-position feedback switch
Drive the valve to open position and verify continuity on the open-position switch. No continuity confirms a misaligned or failed switch.
Check VIB harness at the right/central valve connector
Inspect and measure continuity on the drive and feedback wires between the valve and the VIB board.
Replace faulty components and test
Replace the actuator if it does not respond, the feedback switch if position sensing fails, or the VIB board if wiring is intact but no signal is received. Run a full filtration cycle to confirm.
When to call a professional
E87 always requires a licensed Frymaster technician — hot oil circuit service with lockout/tagout. Frymaster service: 1-800-551-8633.
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Other Frymaster Error Codes
Temperature probe failure - RTD out of range
High limit 1 exceeded - vat temp above 410°F
High limit 2 exceeded - high limit switch opened
High limit problem - vat temp above 460°F, disconnect power immediately
Failed temperature probe or controller
Frypot temperature above 410°F
Heating problem / ignition lockout
Heating failure. The heating-control latch circuit failed, or the heat contactor failed to latch.
Heating failure - blower. The air pressure switch(es) failed to close.
Heating failure - pressure switch. The air pressure switch has failed closed. Call service.
Heating failure. The fryer failed to ignite and has locked out the ignition module.
Top-off probe failure. The ATO (auto top-off) RTD reading is out of range. Call service.
Sources: www.manualslib.com
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