Speed Queen CHM495R Washer Error Code Ed09: Current Sensor
Ed09 on a Design 2 or 3 CHM495R washer-extractor is a current sensor error: the sensor that measures motor current was not operating properly at startup. Cycle the power off and on, try one cycle, and keep customers away if it returns.
High: without a current reading the drive cannot protect the motor, so the cycle does not begin.
- Code
- Ed09
- Maker
- Speed Queen
- Equipment
- Washers
- Applies to
- CHM495R family washer-extractor front-end control (20-100 lb)
What does Speed Queen error code Ed09 mean?
Before it runs the motor, the drive checks the sensor that measures motor current. That reading is how it protects the motor from overload. If the sensor is not operating properly at start-up, the drive cannot protect the motor, so it stops and the cycle does not begin. The display shows Ed09, which Design 2 and 3 machines report. The owner's manual says to power down and up to clear it. The causes are few: a current sensor on the drive that is not working at start-up, a drive board with a failed current measuring circuit, or an unsteady supply to the drive during start-up. The last one matters, because a sensor can read badly for a moment when the incoming power is unstable. A machine that sometimes runs and sometimes shows Ed09 on a restart suggests the supply, while a machine that shows Ed09 every time points at the drive board itself. Either way, it is not a good idea to run the motor without a current reading.
Affected models and control systems
This page covers Design 2 and Design 3 machines of the CHM495R family washer-extractor front-end control. Ed08 and Ed05 are the overcurrent codes that depend on this reading.
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 cycle does not begin after power-up
- Ed09 appears at start
- The machine runs sometimes after a restart
Possible causes
Listed in Speed Queen's documentation
- A current sensor on the drive that is not working at startup
- A drive board with a failed current measuring circuit
- An unsteady supply to the drive during start-up
Other likely causes — what usually sits behind error code Ed09 on this control. A technician confirms which one it is before any part is replaced.
- A building supply that sags when other equipment starts at the same moment
- A drive board circuit weakened by heat from repeated hot loads
Safe checks before calling for service
- Cycle the power off and on, following the owner's manual.
- Keep the door shut until the lock has released.
- Try one cycle.
- If the code returns, ask us to schedule service, keep customers away from the machine, and note what the display showed.
How a technician diagnoses error code Ed09
- Read the code and confirm the machine is a Design 2 or 3.
- Measure the supply to the drive at start-up for dips.
- Power-cycle and see whether Ed09 repeats on every start.
- Inspect the drive connections around the current sensing circuit.
- Replace the drive board only after the supply is steady and the code persists.
- Checking the supply at start-up is live measurement on a high-power circuit.
- The current sensing circuit is inside the drive board, which a technician replaces as a unit.
- Running the motor without a current reading is unsafe for the drive and motor.
Technical reference
- Document
- Washer-Extractor Programming CHM495R_SVG, Part No. F8208501ENR10, March 2017, Error Codes (pp. 36-37)
- Edition
- Part No. F8208501ENR10, March 2017
- Models / control
- CHM495R family washer-extractor front-end control (20-100 lb)
- Section
- Error Codes table, pp. 36-37 (E Pr only on Design 1 models; Ed01-Ed11 on Design 2 and 3 models)
- 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 can't the machine run without the current reading?
The drive needs it to protect the motor, so it stops instead.
Will powering down clear Ed09?
The manual says it does, but a repeat points at the supply or the drive board.
Is Ed09 a motor problem?
Not directly. It concerns the sensor that reads motor current, not the motor itself.
Need help with Speed Queen error code Ed09?
A technician confirms the cause on site and gives you the price in writing before any work starts.