Speed Queen Washer Error Code Eio 45: Hot Fill Tub Valve Shorted
Eio 45 means the input/output board found a short on the output that drives the hot fill tub valve. The control sounds a pulsing alarm for two minutes, and the manual says to clear it by disconnecting and reconnecting power. If it returns, call for service.
Medium: an electrical short on an output needs service, but the manual only describes the alarm and a power reset.
- Code
- Eio 45
- 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 45 mean?
The input/output board is the part of the control that switches the washer's valves and contactors. It watches each output as it works. If one of them looks shorted, the board reports it by number. Eio 45 is the number for the hot fill tub valve, and the display text is “Hot Fill Tub Valve Shorted”.
The manual's description is that the input/output board reports a shorted output for that valve. The control then sounds a pulsing alarm tone for two minutes. The only clearing step it gives is to disconnect and then reconnect power to the machine. It lists no causes and does not say what the washer does with its cycle while the code is active. Because the code names an electrical output, the reason may be the valve coil, the wire between the coil and the board, or the board output. An operator can restart the machine, but cannot tell which of those it is.
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 tone that lasts about two minutes
- Eio 45 on the display
- The tub may not fill with hot water
Possible causes
Likely causes — what usually sits behind error code Eio 45 on this control. A technician confirms which one it is before any part is replaced.
- Hot fill valve coil with a winding shorted inside
- Wire to the hot fill valve rubbed through and touching metal
- Output on the input/output board damaged by a previous short
Safe checks before calling for service
- Note the code and the moment it started, such as at the start of a fill.
- Stop the cycle and disconnect power at the machine's switch or breaker, then reconnect it, as the manual says.
- If the machine starts again, watch whether the tub fills with hot water or whether Eio 45 returns.
- Tell the technician whether the code came back at once or only when the hot fill was requested.
How a technician diagnoses error code Eio 45
- Read the code and confirm it repeats after a power cycle.
- With power off, measure the hot fill valve coil resistance and compare it with the specification.
- Check the harness between the board and the valve for pinched, chafed or wet wiring.
- Inspect the board's output for burn marks and check the supply to it.
- Replace the valve, harness or board only after the measurements show which part is shorted.
- Valve circuits sit behind the panels next to mains-voltage wiring.
- A shorted output can burn the board if the machine is cycled repeatedly, so it should not be restarted over and over.
- Telling a coil from a harness from the board requires resistance tests with the power off.
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
How do I stop the alarm?
The alarm sounds for two minutes. The manual's way to clear the error is to disconnect and then reconnect power.
Can I run the washer with Eio 45?
The manual does not say. If it returns after the power cycle, stop using the machine and call for service.
Does it mean the hot water supply is off?
No. The code is about a shorted valve output, not a shortage of water.
Need help with Speed Queen error code Eio 45?
A technician confirms the cause on site and gives you the price in writing before any work starts.