Huebsch QN Washer-Extractor Error Code Eio 35: Door Lock Output Test
Eio 35 means the stage that drives the door lock solenoid did not pass a hardware test. The control stops the machine so a basket cannot turn behind an uncertain door; power off, wait for the lock to release, and close the door gently before one restart.
High: the lock output cannot be confirmed, so the machine will not run.
What does Huebsch error code Eio 35 mean?
The lock output on a QN-series washer-extractor board is the stage that actually sends power to the door lock solenoid. During its hardware test the board checks that this stage behaves as commanded. Eio 35 means the test failed, so the control cannot confirm it can move the lock when told. The washer stops rather than risk a basket turning behind a door that may not be locked, or one that may not open when the cycle ends. Operators see no start, or a cycle that ends at once, with the code on the display. The solenoid output on the board and the solenoid's wiring are the main suspects. A lock coil with a short or an open winding can make the test fail, as can a connector that sits loose or an unsteady supply voltage to the board. The code points at the output stage, not at a particular cycle.
Affected models and control systems
This applies to Huebsch QN-series washer-extractors in the CHM1792C family, 20 to 100 lb, with the front-end control in that programming manual.
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
- The washer will not start or stops again at once, with Eio 35
- The lock does not click when a cycle is requested
- The door will not latch properly
Possible causes
Listed in Huebsch's documentation
- Solenoid driver stage on the output board failing
- Lock coil or harness with a short or open
- Connector at the board sitting loose
- Unsteady supply voltage reaching the output board
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 lock coil with an open winding after years of heat cycling
- A driver stage worn by repeated starts on a high-volume machine
Safe checks before calling for service
- Power the machine off and wait until the lock lets go before touching the door.
- Close the door squarely, without slamming.
- Switch power on and see whether the code remains.
- Book us for a visit if it does, and tell us whether the lock made any sound.
How a technician diagnoses error code Eio 35
- Read the code and confirm Eio 35 returns after a power cycle.
- Command a lock operation and watch for voltage at the solenoid with a meter.
- With the power locked off, check the coil for an open or a short.
- Inspect the connectors and harness for looseness and wear.
- Replace the output board or the solenoid only after the readings identify the failed part.
- The lock output carries live voltage, so measuring it means working around energized circuits.
- The lock protects people from a spinning basket, so its repair follows the maker's procedure.
- Telling a driver failure from a bad coil takes a meter and the wiring diagram.
How error code Eio 35 differs from similar codes
Eio 35 is the hardware test of the lock output stage. Eio 36 covers the pulse circuit, and Eio 32 covers the relay pin.
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 Huebsch washer error codes
Why does the machine stop when the lock is uncertain?
A basket that spins behind an unlocked door is a danger, so the control blocks the cycle.
Will slamming the door help?
No. Close it squarely and gently.
Can I bypass the lock?
No. Bypassing a door lock removes the machine's main protection.
Need help with Huebsch error code Eio 35?
A technician confirms the cause on site and gives you the price in writing before any work starts.