Speed Queen Washer Error Code Eio 35: Door Lock Output Hardware
Eio 35 on a CHM1792C washer-extractor is a door lock solenoid hardware output failure. The board output that powers the lock did not pass its own check, so the machine will not run a cycle. The door may stay locked or unlocked, so wait for it to settle, post a sign and send us a service request.
High: the lock output failed in hardware, and the machine will not run until it is repaired.
- Code
- Eio 35
- Maker
- Speed Queen
- Equipment
- Washers
- Applies to
- CHM1792C family washer-extractor (QN models, 20-100 lb) front-end control
What does Speed Queen error code Eio 35 mean?
The input and output board has an output stage that powers the door lock solenoid, and that stage tests itself. Eio 35 reports that the lock output failed its own check in hardware. Without it, the control has no dependable way to energize the lock, so it will not start or continue a cycle. The display shows the code, and the door may be either locked or unlocked depending on when the failure appeared. That uncertainty is the reason the machine stays out of service. The manual lists a lock output stage on the board that failed its own check, door lock solenoid wiring that is open or shorted, and a board supply that is low or unsteady. Wiring that is open will stop the lock from pulling in; wiring that is shorted can overload the stage and damage it. This is a hardware output code, so it differs from the pin codes, which report the control's side of the same circuit.
Affected models and control systems
CHM1792C family washer-extractors, QN models, 20 to 100 lb, with the front-end control and its input and output board.
Code numbers and their meaning can change between control generations. We match the full model and control before acting on a code.
What you may notice
- Eio 35 stays on the display and the machine will not start
- The door is locked or unlocked unexpectedly
- The code reappears after a restart
Possible causes
Listed in Speed Queen's documentation
- A lock output stage on the board that failed its own check
- Door lock solenoid wiring that is open or shorted
- A board supply that is low or unsteady
Other likely causes — what usually sits behind error code Eio 35 on this control. A technician confirms which one it is before any part is replaced.
- A shorted solenoid coil that overloaded the output stage and damaged it
- A lock cable worn through where the door swings
Safe checks before calling for service
- Write down the full code, Eio and its two digits.
- Wait for the lock state to settle before touching the door.
- Do not tamper with the door switch.
- Put a sign on the machine and send us a service request.
How a technician diagnoses error code Eio 35
- Read the full code and see whether it returns after a power cycle.
- Inspect the lock cable and plugs for opens, shorts or chafing, with power off and locked out.
- Measure the solenoid coil resistance.
- Check the supply to the board under load.
- Test the output stage only after the solenoid and wiring are proven good.
- Replace the board or solenoid according to the test.
- The output stage switches live solenoid power, so a wrong probe can injure someone or damage the board.
- A shorted solenoid can destroy a new board, so the coil and wiring have to be tested first.
- The door lock is a safety device that must not be bypassed to test the machine.
How error code Eio 35 differs from similar codes
Eio 35 is the lock output. Eio 36 is the pulse hardware, Eio 37 the full-hold hardware and Eio 34 the disable circuit hardware.
Technical reference
- Document
- Washer-Extractor Programming CHM1792C_SVG, Part No. F8641001ENR4, Error Codes Table 29 (pp. 100-107)
- Edition
- Part No. F8641001ENR4, January 2020
- Models / control
- CHM1792C family washer-extractor (QN models, 20-100 lb) front-end control
- Section
- Error Codes, Table 29, pp. 100-108 (PDF pages equal printed pages)
- Checked
- October 2026
We use the maker's document to read the code and do not reproduce it. Always confirm the complete model and control before applying these steps.
Related Speed Queen washer error codes
Why might the door be unlocked after Eio 35?
The control cannot rely on the lock, so the state depends on when the failure happened. Do not trust it either way.
Could a bad solenoid cause Eio 35?
Yes. Wiring that is open or shorted is listed, and a shorted coil can also damage the output.
Can I clear it myself?
A restart may clear the display for a moment, but the check fails again if the cause is still there.
Need help with Speed Queen error code Eio 35?
A technician confirms the cause on site and gives you the price in writing before any work starts.