Keys
Check for a stuck or continuously signaled key
The explanation tied Er to a membrane switch sending an unexpected input.
Error-code case · Frigidaire Gallery
Er Starts at the Keys and Their Signal Path
A customer photo identified a Frigidaire Gallery dishwasher and showed Er, but the sequence after it was unknown. The useful next move was to verify whether the keypad was sending an invalid or continuously pressed-key signal.
The photograph proved the brand and Er, but not what followed it
The technician received photographs rather than observing the dishwasher directly. The image identifies a Frigidaire Gallery unit and shows Er; the customer did not provide the next display state. The chat initially called the appliance Electrolux, so the visible door badge is the stronger identity evidence. The discussion treated Er as a membrane-switch failure caused by an invalid key signal, a stuck key or a key held longer than expected. It separately noted that an Er-to-Cl sequence would focus attention on the user interface.
A similar control-panel symptom can have a different cause on another model. The code gives a test order, not proof that a board should be replaced.
The proposed order preserves the cheapest distinctions first
Signal path
Inspect the keypad-to-control connection
Wiring and connectors can interrupt or corrupt the same signal without making the main control the first conclusion.
Parts order
Escalate from keypad to main control only if the error remains
The discussion placed keypad replacement before the main board when no correctable key or wiring problem was found.
Er identifies an input problem; Er followed by Cl changes the emphasis
The supported diagnostic model is a bad control-panel input path. A complete display sequence matters: Er alone was associated with the membrane switch and keys, while Er followed by Cl was described as a user-interface indication.
The case did not document which component ultimately failed, so neither the keypad nor the main control is presented as a confirmed repair.
Capture the full display sequence before resetting power
Record every character that follows Er and note whether any key feels mechanically held or responds without being pressed. That evidence lets a technician test the interface signal path before ordering the more expensive control.
Electrical safety: disconnect power before opening the control console or handling the keypad ribbon. Do not probe an energized dishwasher control or bypass a key circuit.