Speed Queen Washer-Extractor Error Code E d Co: Drive Link Lost
On CHM1792C washer-extractors, E d Co says the front-end control has lost contact with the drive board that powers the motor. Without that link, the cycle stops and a wet load may stay in the drum. Disconnect and reconnect power, and call us if it returns.
High: the control cannot reach the drive, so the machine stops.
- Code
- E d Co
- 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 E d Co mean?
The washer-extractor splits its work between two boards: the front-end control, which holds the cycle and the keypad, and the drive board, which turns the motor. They communicate constantly. The control sends the drive its commands, and the drive reports back. When replies stop arriving, the control cannot start or hold a spin, since it does not know what the drive is doing, so it stops the cycle and shows E d Co (display text: E d Co). The code is about the link between the two boards, not about water or the door. The owner's manual says to disconnect and reconnect power. The manual lists a communication cable that is loose or broken between boards, a drive board that has lost its power feed, a corroded or bent pin in the board connector, and a failed front-end control or drive board. Keep customers away from the machine and the cabinet closed while the code is showing.
Affected models and control systems
Speed Queen CHM1792C family washer-extractors (QN models, 20-100 lb) with the front-end control. Other washer-extractor families, such as CHM495R, list different codes.
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
- E d Co on the display
- The cycle stops and the basket slows
- A wet load stays in the drum
Possible causes
Listed in Speed Queen's documentation
- Communication cable loose or broken between boards
- Drive board has lost its power feed
- Corroded or bent pin in the board connector
- Failed front-end control or drive board
Other likely causes — what usually sits behind error code E d Co on this control. A technician confirms which one it is before any part is replaced.
- A cable chafed where it passes the cabinet frame
- A power dip that stopped the drive board while the control stayed alive
Safe checks before calling for service
- Disconnect and reconnect power, as the owner's manual says.
- Let the lock release before the door opens.
- Do not open the cabinet, and keep customers away from the machine.
- If E d Co returns, put a sign on the machine and reach out for service.
How a technician diagnoses error code E d Co
- Read E d Co and note whether the display is otherwise normal.
- Measure power at the drive board.
- Inspect the communication cable and both connectors with power off.
- Clean or reseat the connections and test the link.
- Replace the cable or the board that fails.
- The drive board is at 208-240 V and keeps a stored charge.
- A bent connector pin can be hard to see and takes a trained eye.
- Choosing between a control and drive board replacement needs known good parts or a meter on the link.
How error code E d Co differs from similar codes
E Co is the output board link; E d Co is the link to the drive board.
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
Is E d Co the same as E Co?
No. They name different board links on the machine.
Will the load stay wet?
Yes, until the machine is cleared and the link restored.
Will a restart fix it?
Sometimes; a repeat points at the cable, connector or a board.
Need help with Speed Queen error code E d Co?
A technician confirms the cause on site and gives you the price in writing before any work starts.