Speed Queen Washer-Extractor Error Code E d 44: Shunt Circuit Failed
E d 44 on a CHM1792C washer-extractor says the circuit that detects overcurrent shunt conditions has failed. This is a hardware failure on the drive, which will not run without it. Take power off to clear the code and call us if it returns.
High: the drive will not run without its protection circuit, so the machine stops.
- Code
- E d 44
- 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 44 mean?
The drive protects the motor with a circuit that watches the current through a shunt. That circuit is what produces warnings such as E d 23. If the protection circuit itself stops working, the drive has no way of knowing whether the current is safe, so it will not run the motor at all (display text: E d 44). It is a hardware failure rather than a condition in the load or the motor. The owner's manual says to power down to clear the code and to replace the drive board if the code persists. It lists the drive board protection circuit, the supply to the drive, and a recent power event. A lightning strike, an outage or a surge can damage a protection circuit without damaging anything else. The machine stops and shows the code, with the load staying in the drum. If you recall a storm or outage before the code appeared, tell the technician, because it helps point to the drive board.
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 44 on the display
- The machine will not start a cycle
- The code may have followed a storm or outage
Possible causes
Listed in Speed Queen's documentation
- Drive board protection circuit failed
- Supply to the drive unstable
- Recent power event
Other likely causes — what usually sits behind error code E d 44 on this control. A technician confirms which one it is before any part is replaced.
- A surge that damaged the drive board during a storm
- A brownout that the building's wiring let through to the machine
Safe checks before calling for service
- Take power off the machine, which the owner's manual names as the way to clear it.
- Open the door only after its lock has released.
- Make a note of any storm or outage before the code appeared.
- If the code returns, contact us for service.
How a technician diagnoses error code E d 44
- Read E d 44 and ask about recent outages or storms.
- Check the supply voltage and grounding at the machine.
- Inspect the drive board for burn marks or damage with power off.
- Compare with the drive's wiring and protection devices.
- Replace the drive board when the supply checks out.
- The protection circuit is on the drive board, which holds a charge at 208-240 V after power is off.
- A failed protection circuit cannot be tested without comparing it to the board's specification.
- A surge can damage more than one part, so the supply and wiring need testing as well.
How error code E d 44 differs from similar codes
E d 44 is the detector failing; E d 23 is the detector reporting a real surge.
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
Does E d 44 mean the motor is damaged?
No. It says the drive's protection circuit failed.
Could a storm cause it?
A power event is one of the listed possibilities.
Will a restart fix it?
It clears the display, but a failed circuit returns the code.
Need help with Speed Queen error code E d 44?
A technician confirms the cause on site and gives you the price in writing before any work starts.