Speed Queen Washer Error Code Eio 51: Compartment 1 Valve Shorted
Eio 51 means the input/output board found a short on the output for the compartment 1 valve. The control sounds a pulsing alarm for two minutes, and the manual clears it by cycling power. If the code returns, call for service.
Medium: a shorted valve output needs service, and the manual describes only an alarm and a power reset.
- Code
- Eio 51
- Maker
- Speed Queen
- Equipment
- Washers
- Applies to
- Alliance/Speed Queen CHM1792C_SVG washer-extractor (model numbers on p. 8)
What does Speed Queen error code Eio 51 mean?
The manual lists a separate output for each numbered compartment valve, and Eio 51 is the one for compartment 1. The input/output board watches that output while it switches the valve on and off. If the output looks shorted, the board reports it, and the display shows “Compartment 1 Valve Shorted”.
The manual does not describe what the compartment feeds, and it lists no causes. It does say that the control sounds a pulsing alarm tone for two minutes and that the error is cleared by disconnecting and then reconnecting power to the machine. The fact that each compartment has its own code is helpful. A short on compartment 1 does not by itself implicate compartments 2, 3 or 4, so the technician can start at this valve and its wiring. If two or more compartment codes show together, a shared wire or the board becomes more likely.
Affected models and control systems
Alliance/Speed Queen washer-extractors covered by programming manual CHM1792C_SVG; the model numbers are listed on page 8 of that 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
- Pulsing alarm for two minutes
- Eio 51 on the display
- Compartment 1 not working during its step
Possible causes
Likely causes — what usually sits behind error code Eio 51 on this control. A technician confirms which one it is before any part is replaced.
- Compartment 1 valve coil shorted
- Connector for compartment 1 wet from a leak
- Driver for output 1 failed on the input/output board
Safe checks before calling for service
- Record Eio 51 and the step at which it started.
- Switch power off, wait, and switch it back on as the manual describes.
- Check whether any water is dripping near the valve bank, without opening panels.
- Mention if other compartment codes have also shown.
How a technician diagnoses error code Eio 51
- Confirm the code repeats after a power cycle.
- Measure the compartment 1 valve coil resistance with the power off.
- Check the connector for moisture or corrosion.
- Compare with the other compartment valves to find a problem in shared wiring.
- Replace the valve, wire or board after the tests.
- The valve bank sits near water and mains-voltage wiring, a bad mix for anyone untrained.
- Comparing four compartments takes a meter and the wiring diagram.
- Restarting repeatedly on a short can harm the board.
How error code Eio 51 differs from similar codes
Eio 51 to Eio 54 are the same kind of short for compartments 1 to 4.
Technical reference
- Document
- Washer-Extractor Programming CHM1792C_SVG (Original Instructions)
- Edition
- Part No. F8641001ENR4, January 2020
- Models / control
- Alliance/Speed Queen CHM1792C_SVG washer-extractor (model numbers on p. 8)
- 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 Eio 51 affect all compartments?
No. It names compartment 1 only.
Is a leak behind this?
Possibly, because water on a connector can short it, but the manual does not say so.
Can I clear the code?
Cycle power, as the manual says. If the short remains, the code returns.
Need help with Speed Queen error code Eio 51?
A technician confirms the cause on site and gives you the price in writing before any work starts.