Speed Queen Washer Error Code Eio 56: Heat Contactor Coil Shorted
Eio 56 means the input/output board found a short on the output for the electric heat contactor coil. The control sounds a pulsing alarm for two minutes, and the manual clears it by cycling power. If it returns, do not run heated cycles until a technician checks it.
High: the output belongs to the heater contactor, so heated cycles should wait until a technician tests it.
- Code
- Eio 56
- 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 56 mean?
Electric heating in a washer-extractor is switched by a contactor, and the input/output board powers that contactor's coil through one of its outputs. The board checks the output, and if it looks shorted it shows Eio 56, with the text “Electric Heat Contactor Coil Shorted”.
The manual's statement is that the control sounds a pulsing alarm tone for two minutes, and that the error clears when power to the machine is disconnected and reconnected. It gives no causes. Only washers fitted with electric heat will have this output connected, so on a machine heated by steam this code would not normally be expected. A short here concerns the control side of the heater circuit, the coil, not the heating elements themselves. Still, the contactor carries heater current, so the repair should be done by someone who can isolate power safely and test each part.
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 lasting two minutes
- Eio 56 on the display
- Water does not heat during a heated cycle
Possible causes
Likely causes — what usually sits behind error code Eio 56 on this control. A technician confirms which one it is before any part is replaced.
- Heat contactor coil shorted internally
- Coil wiring damaged by heat near the heater contactor
- Heat output on the board burnt out
Safe checks before calling for service
- Write down Eio 56 and whether the cycle was heating.
- Cycle power once, per the manual.
- Avoid heated programs if the code returns.
- Tell the technician whether the washer uses electric heat or steam.
How a technician diagnoses error code Eio 56
- Confirm the code repeats after a power cycle.
- With power off and locked out, measure the heat contactor coil.
- Inspect the contactor terminals and coil wiring for heat discoloration.
- Check the board output and connector.
- Replace the coil or contactor, harness or board that fails the tests.
- Heater contactors switch high current, and testing around them requires lockout.
- Heat damage on terminals is easy to miss without a close look.
- Resetting repeatedly on a shorted output can damage the board.
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 56 mean the heating elements are broken?
Not necessarily. It describes a short on the output to the contactor coil.
Can I use cold cycles?
The manual does not say. Ask the technician before relying on the washer.
Is the alarm part of the repair?
No. It only announces the code for two minutes.
Need help with Speed Queen error code Eio 56?
A technician confirms the cause on site and gives you the price in writing before any work starts.