Huebsch CHM495R Washer-Extractor Error Code E Pr: Pressure Switch
E Pr on a Huebsch CHM495R washer-extractor is a low level pressure switch error: the switch was in the wrong position after the first fill step in the production test cycle. Switch the machine off at the disconnect, which resets it, and confirm a normal cycle is selected. Call us if the code appears on a normal cycle.
Low: it belongs to the test cycle and clears with a power-down in normal use.
What does Huebsch error code E Pr mean?
The CHM495R control checks the low level pressure switch after the first fill step of the factory production test cycle. It expects the switch to have changed position once water arrived. If the switch is still in the wrong position, the display shows "E Pr". The manual clears it with a power-down. Operators will rarely see this, since the check belongs to the test cycle and a normal wash does not run it. If the message appears in normal use, the pressure switch, its tube or its wiring may be behaving oddly. The manual names a low level pressure switch stuck in the wrong position, a damaged air tube or wire at the switch, and a test cycle started by mistake instead of a normal wash. Selecting the wrong program is the cheapest explanation, so it is worth confirming before anyone looks at hardware.
Affected models and control systems
This page applies to CHM495R-family washer-extractors, 20 to 100 lb, with the front-end control. QN washer-extractors show a similar message, E LP, on their own page.
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
- "E Pr" on the display after the first fill
- The machine does not move on to the next step
- Message only seen on the test program
Possible causes
Listed in Huebsch's documentation
- Low level pressure switch stuck in the wrong position
- Damaged air tube or wire at the pressure switch
- Test cycle started by mistake instead of a normal wash
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.
- A tube that slipped off the switch nozzle after the machine was moved
- A switch contaminated by moisture that sticks until it dries
Safe checks before calling for service
- Switch the machine off at the disconnect, which resets it.
- Confirm a normal cycle is selected and not a test cycle.
- Do not open the control to check the switch.
- Call us if the code appears on a normal cycle, and tell us which program was running.
How a technician diagnoses error code E Pr
- Read the code and confirm the program that was running.
- Inspect the air tube between the tub and the switch.
- Check the connector and wire at the switch.
- Test the switch with a meter while the level changes.
- Replace the switch or tube only after the test.
- The switch is wired to the control and verified with a meter while powered.
- Reaching the switch and tube means opening the enclosure.
- Telling a stuck switch from a loose tube takes controlled water-level changes.
How error code E Pr differs from similar codes
E Pr is the CHM495R's wording. The QN washer-extractors use E LP for the same low level pressure switch in the production test cycle.
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 Huebsch washer error codes
Should I ever see E Pr on a normal wash?
Rarely. The check belongs to the production test cycle.
Does turning the power off clear it?
Yes, the manual clears it with a power-down.
What if it returns on a normal wash?
Then the switch, tube or wire needs testing.
Need help with Huebsch error code E Pr?
A technician confirms the cause on site and gives you the price in writing before any work starts.