Speed Queen CHM495R Washer-Extractor Error Code E Pr: Pressure Switch
E Pr on a CHM495R washer-extractor reports a low level pressure switch problem found after the first fill step of a test cycle. The owner's manual clears it with a power-down. If it appears in normal cycles, request service.
Low: it normally appears only in a test cycle and clears with a power-down.
- Code
- E Pr
- Maker
- Speed Queen
- Equipment
- Washers
- Applies to
- CHM495R family washer-extractor front-end control (20-100 lb)
What does Speed Queen error code E Pr mean?
E Pr belongs to the test sequence of the CHM495R, which is a built-in cycle used when a machine is first built or tested. After the first fill step in that cycle, the control looks at the low level pressure switch. If the switch is sitting in the wrong position, the control ends the cycle and shows E Pr. Only Design 1 models show it, and owners rarely see it. The owner's manual says powering down clears it. The first thing to ask is whether someone started a test cycle by mistake, since a test cycle selected by accident would explain a message that normal laundry cycles never produce. If the code appears in normal cycles, the switch circuit deserves attention: a pressure switch or air tube that is blocked or loose, wiring on the switch that is broken or has a loose plug, or a fill valve that does not pass water in the first step.
Affected models and control systems
This page covers Design 1 models of the CHM495R family washer-extractor front-end control, 20 to 100 pounds. CHM1792C machines report a related low level switch problem as E LP.
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
- The cycle ends soon after the first fill step
- E Pr shows on the display
- Normal cycles run fine after a power-down
Possible causes
Listed in Speed Queen's documentation
- A pressure switch or air tube that is blocked or loose
- Pressure switch wiring that is broken or has a loose plug
- A test cycle started by mistake
- A fill valve that does not pass water in the first step
Other likely causes — what usually sits behind error code E Pr on this control. A technician confirms which one it is before any part is replaced.
- An air tube that was left kinked when the cabinet panel went back on after maintenance
- A hot-water inlet valve with a blocked screen that passes no water in the first fill step
Safe checks before calling for service
- Switch the machine off; the owner's manual clears E Pr with a power-down.
- Think back to whether anyone started a test cycle.
- Give the lock time to release before opening.
- If the code returns during normal cycles, note when it showed up and request service.
How a technician diagnoses error code E Pr
- Read the code and ask whether a test cycle was selected.
- Run a normal cycle and watch the first fill step.
- Check that the fill valve opens and passes water in the first step.
- Inspect the pressure switch, its air tube and wiring for blockage or breaks.
- Replace the switch or tube only after it fails the test.
- The pressure switch is wired into the control behind the panels, and live testing needs a trained technician.
- The test cycle runs the machine through a sequence that should be handled by someone who knows it.
- Checking whether the first fill step passes water takes timed tests on a machine that is connected to supply.
Technical reference
- Document
- Washer-Extractor Programming CHM495R_SVG, Part No. F8208501ENR10, March 2017, Error Codes (pp. 36-37)
- Edition
- Part No. F8208501ENR10, March 2017
- Models / control
- CHM495R family washer-extractor front-end control (20-100 lb)
- Section
- Error Codes table, pp. 36-37 (E Pr only on Design 1 models; Ed01-Ed11 on Design 2 and 3 models)
- 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
Is E Pr common?
No. It comes from the test sequence, so owners rarely see it.
Does every CHM495R show it?
No. Only Design 1 models do.
Will a power-down clear it?
Yes, according to the owner's manual, but a return in normal cycles points to the pressure switch circuit.
Need help with Speed Queen error code E Pr?
A technician confirms the cause on site and gives you the price in writing before any work starts.