mypros+
Error code reference

Amana Range Error Code F90

Door lock in wrong position.

Amana codesAmana range codes

Door lock in wrong position.

MyPros+ Max

Get the full diagnostic procedure for F90.

  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
Get the full procedure

$29/month · Cancel anytime · Or $9.95 3-day pass

What F90 means on a Amana range

The F90 error code on an Amana range indicates that the door lock mechanism is in the wrong position. This code is directly tied to the self-clean door locking system, which uses a motorized latch assembly to secure the oven door during high-temperature cleaning cycles. The control board monitors the position of this latch through one or more position switches (also called door lock switches or microswitches). When the board receives a signal indicating the latch is neither fully locked nor fully unlocked, it interprets this as a fault condition and displays F90.

The door lock motor drives a cam or lever mechanism that physically moves the latch bolt into the locked or unlocked position. Two switches typically confirm these end positions to the control board. If the motor stalls partway through its travel, if a switch fails, or if the mechanical linkage is obstructed or broken, the latch stops in an intermediate position. This causes the control board to register a disagreement between the expected and actual door lock state, triggering F90.

Common root causes include debris or food buildup jamming the latch mechanism, a failed door lock motor, worn or misaligned position switches, or a wiring fault in the lock assembly circuit. In some cases the latch may have been manually forced or the door closed improperly during a previous self-clean cycle, leaving the mechanism out of alignment. Clearing the error requires identifying and correcting the mechanical or electrical fault in the lock assembly.

Source: manufacturer service documentation.

Common causes of F90

  1. 01

    Obstructed or jammed door latch mechanism

    Wiring / connection

    Food debris, grease buildup, or a foreign object can physically block the latch from completing its travel to the locked or unlocked position. Inspect the latch area around the door frame for obstructions and clean thoroughly.

  2. 02

    Failed door lock motor

    Part replacement

    The motorized actuator that drives the latch bolt can burn out or seize, leaving the latch stuck partway. A failed motor will often not respond at all when a self-clean cycle is initiated.

  3. 03

    Faulty door lock position switch

    Part replacement

    One or more microswitches confirm the locked and unlocked positions to the control board. A switch that has failed open or shorted will send an incorrect position signal, triggering F90 even if the latch itself moves correctly.

  4. 04

    Wiring fault in the lock assembly circuit

    Wiring / connection

    Damaged, loose, or corroded wiring between the door lock assembly and the control board can interrupt position signals. Inspect the wiring harness connectors at both the lock assembly and the board for corrosion or broken wires.

  5. 05

    Control board failure

    Part replacement

    If the latch mechanism and switches test correctly, the main control board itself may be misreading or failing to process the lock position signals. This is the least common cause and should be diagnosed after all other components are ruled out.

See the test procedure for each cause

Frequently asked questions about F90

What does F90 mean on a Amana range?
F90 means the oven door lock is in the wrong position, according to the control board. The board monitors the motorized door latch that secures the oven during self-clean cycles, and F90 appears when the latch is detected in an intermediate position rather than fully locked or fully unlocked. This can be caused by a mechanical jam, a failed lock motor, or a faulty position switch.
Will resetting the range clear the F90 error code?
A reset by cutting power at the breaker for one to two minutes may temporarily clear the code, but it will return if the underlying fault is not fixed. If the latch mechanism was only momentarily stuck, a reset combined with manually freeing the latch may resolve the issue. Persistent F90 codes after a reset indicate a component failure that needs to be diagnosed and repaired.
Is it safe to use my Amana range while F90 is displayed?
Standard bake and broil functions may still operate depending on the state of the control board, but it is not advisable to attempt a self-clean cycle while F90 is active. Running a self-clean cycle with a malfunctioning door lock is a safety concern because the door may not stay securely latched at high temperatures. Resolve the door lock fault before using the self-clean feature.
How do I fix the F90 error code on my Amana range?
Start by cutting power to the range and inspecting the door latch area for any debris or obstructions that may be preventing full travel of the latch mechanism. Clean the area around the latch and attempt to manually move it to the fully unlocked position if it is accessible. If the latch moves freely and the code persists after restoring power, the door lock motor or one of its position switches likely needs to be tested and replaced.
How much does it cost to repair an F90 door lock error on an Amana range?
Repair costs vary depending on which component has failed. A door lock motor and switch assembly typically costs between $40 and $120 for the part alone. Adding professional labor, total repair costs commonly fall in the range of $120 to $300. Control board replacement, if required, can push costs higher.

Related Amana range codes

All Amana range codes
View all 30 Amana range codes

78,000+ service manuals · 160,000+ error codes · 55+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass