Huebsch QN Washer-Extractor Error Code Eio 36: Door Lock Pulse Test
Eio 36 means the circuit that makes the pulse for the door lock solenoid failed its hardware test. Without a proper pulse the lock may not move when told, so the control halts the machine; turn it off, wait for the lock to release, and try one restart.
High: the lock pulse cannot be delivered, so the machine will not run.
What does Huebsch error code Eio 36 mean?
The door lock solenoid on a QN washer-extractor is moved by a short pulse of power from the input and output board. A pulse circuit that is weak or damaged may fail to move the lock at the right moment. During the board's hardware test, the pulse circuit did not behave as it should, and the control displays Eio 36 and holds the machine. Operators see a washer that does not start a cycle or lock its door. This is the hardware counterpart to the pulse pin check in Eio 31, and it points to the board's pulse circuit. The solenoid and harness are checked next, because a lock solenoid shorted against the pulse output can fail the test too. A connector that is not fully seated and a low or unsteady supply at the board complete the list. The cycle selected has no bearing on this code.
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 does not start a cycle and shows Eio 36
- The door does not lock when a cycle is requested
- The code returns on the next power-up
Possible causes
Listed in Huebsch's documentation
- Lock pulse circuit on the QN output board failing
- Lock solenoid or harness shorted against the pulse output
- Connector at the board not fully seated
- Low or unsteady supply voltage at the output board
Other likely causes — what usually sits behind error code Eio 36 on this control. A technician confirms which one it is before any part is replaced.
- A pulse driver weakened by repeated short bursts into a worn solenoid
- A harness pinched at the door hinge where it shorts to the frame
Safe checks before calling for service
- Turn the washer off and wait until the lock lets go.
- Check that nothing blocks the door from closing.
- Turn it on once to see the display.
- If Eio 36 returns, ask us for a visit and tell us whether the door latched.
How a technician diagnoses error code Eio 36
- Read the code and confirm Eio 36 returns after a power cycle.
- With the power locked off, check the solenoid and harness for a short to ground or to the pulse line.
- Inspect the connectors at the board.
- Check the supply voltage at the output board.
- Replace the board or lock only after a test isolates the failed part.
- The pulse is switched at live voltage on the output board, so testing it is energized work.
- A lock that does not move on command is a safety problem for anyone reaching into the drum.
- Separating a pulse driver failure from a shorted solenoid needs a meter and the wiring diagram.
How error code Eio 36 differs from similar codes
Eio 36 is the hardware test of the lock pulse circuit. Eio 31 is the pin check for the same pulse.
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
Is Eio 36 the same as Eio 31?
They concern the same pulse. Eio 31 is a pin check, and Eio 36 is the hardware test.
Can the solenoid cause it?
Yes. A solenoid or wire shorted against the pulse output can fail the test.
Can I use the machine without the lock?
No. The control will not run a cycle without a confirmed lock.
Need help with Huebsch error code Eio 36?
A technician confirms the cause on site and gives you the price in writing before any work starts.