Huebsch QN Washer-Extractor Error Code E d 64: IPM Temp Sensor Open
E d 64 is a fatal hardware failure that reads the IPM temperature sensor as open: the sensor in the drive's power module appears disconnected or broken. The drive stops the motor rather than run blind. Take power off the machine to clear the message, switch it on again, and call us if E d 64 shows again.
High: a fatal hardware error stops the drive, so the machine will not run until it is repaired.
What does Huebsch error code E d 64 mean?
Where E d 63 means the temperature sensor looks shorted, E d 64 means it looks open, like a cut wire. The sensor sits in the drive's power module and gives the drive a temperature reading that it relies on to protect the module. With the reading gone, the drive has no temperature information at all. It stops the motor rather than run blind, since an unseen overheating would destroy the power module quickly. Operators see a washer that will not start the drum, with the code on the display. A power-down clears the message, the manual says, and a repeat points to the drive board. The manual's causes are the temperature sensing circuit on the drive, connections inside the drive, the power module, and heat or moisture damage on the board. Open readings are more often a connection problem than a short is, so a connector that has worked loose is a realistic reason. The key point for an owner is that the machine may not be hot at all. The code is about the sensor reading.
Affected models and control systems
E d 64 is listed for CHM1792C-family Huebsch QN washer-extractors (20 to 100 lb) with the front-end control. Other controller generations list this under other numbers.
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
- Washer will not start the drum
- E d 64 on the display
- Cycle halts at power-up or the first start
- Code returns after the power-down
Possible causes
Listed in Huebsch's documentation
- Temperature sensing circuit on the drive
- Connections inside the drive
- Power module
- Heat or moisture damage on the board
Other likely causes — what usually sits behind error code E d 64 on this control. A technician confirms which one it is before any part is replaced.
- Sensor connector worked loose by vibration over years
- Board corroded by steam or moisture in the laundry room
- Sensor lead broken at the module after an earlier repair
Safe checks before calling for service
- Take power off the machine to clear the message.
- Switch it on again and see whether the message stays gone.
- Leave the drive cover alone, because opening it exposes live parts.
- Call us if E d 64 shows again, and tell us if the room is steamy or the machine was recently serviced.
How a technician diagnoses error code E d 64
- Read the code and ask about recent service work and room conditions.
- With the unit discharged, inspect the board and connections for corrosion or looseness.
- Measure the sensor circuit for an open reading.
- Reseat the connector and recheck the reading.
- Replace the board or power module if the reading stays open, and run a loaded start.
- Opening the drive cover exposes live parts and stored charge.
- A cut sensor lead and a failed power module read the same without a meter and the right values.
- Moisture damage on a board often spreads, so a technician must inspect the whole board.
How error code E d 64 differs from similar codes
E d 64 reads the temperature sensor as open. E d 63 reads it as shorted, and E d 25 is real overheating of the power module.
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 the washer hot when E d 64 shows?
Not necessarily. The code says the sensor gives no reading, not that the module is hot.
Why would a sensor read open?
A loose connector, a broken lead, or damage on the board.
Can I run it after a restart?
If the message stays clear, yes, but a repeat should be checked.
Need help with Huebsch error code E d 64?
A technician confirms the cause on site and gives you the price in writing before any work starts.