Huebsch QN Washer Error Code E LP: Low Level Pressure Switch
E LP on a Huebsch QN washer-extractor with heat is a low level pressure switch error, and the manual says it is enabled only during the production test cycle. Check that the machine is not in a test cycle, then switch it off and on and watch the first fill step. Contact us if the code appears on a normal cycle.
Low: it normally appears only in a test cycle and points to the switch rather than to a wash.
What does Huebsch error code E LP mean?
The QN control uses a low level pressure switch to mark when the tub holds a minimum amount of water, which protects the heating element on machines with heat. During the factory production test cycle, the control checks that this switch is in the position it expects at the test step. If it is not, the display reads "E LP". The manual states this code is enabled only for the production test cycle, so most operators will rarely see it in normal use. When it does show up, it points to a switch or wiring problem rather than a wash problem. The manual lists a low level pressure switch that is stuck or has a blocked air tube, a loose connector or damaged wire at the switch, and a production test cycle started by mistake. Of these, the test cycle is the one that can be checked first without touching anything.
Affected models and control systems
This page covers QN-series washer-extractors with heat, 20 to 100 lb, with the CHM1792C front-end control. Machines without heat do not carry this switch.
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 LP" on the display, often at the first fill step
- Machine will not continue the program
- No other sign of a wash problem
Possible causes
Listed in Huebsch's documentation
- Low level pressure switch stuck or air tube blocked
- Loose connector or damaged wire at the pressure switch
- Production test cycle started by mistake
Other likely causes — what usually sits behind error code E LP on this control. A technician confirms which one it is before any part is replaced.
- A pinched air tube from the switch after cleaning or servicing nearby
- Moisture in the tube that keeps the switch from changing state at the right level
Safe checks before calling for service
- Check that the machine is not in a test cycle.
- Switch the machine off and on again, and watch the first fill step.
- Leave the switch and its tube alone.
- Contact us if the code appears on a normal cycle, and tell us what step the machine was in.
How a technician diagnoses error code E LP
- Read the code and confirm the machine is not in the production test cycle.
- Inspect the air tube from the switch for kinks or water.
- Check the connector and wiring at the switch.
- Test the switch with a meter as water level changes.
- Replace the switch or repair the wire only after the test.
- The switch is wired into the control and checked with a meter while the machine is powered.
- Tube and connector work is done behind panels near live circuits.
- Knowing whether the test cycle is active needs the machine's own menu.
How error code E LP differs from similar codes
E LP is an unusual message that only appears in the factory test cycle, unlike the common leak messages E Ld and E LF.
Technical reference
- Document
- Washer-Extractor Programming CHM1792C_SVG, Part No. F8641001ENR4, Error Codes Table 29 (pp. 100-107)
- Edition
- Part No. F8641001ENR4, January 2020
- Models / control
- CHM1792C family washer-extractor (QN models, 20-100 lb) front-end control
- 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 Huebsch washer error codes
Should I see E LP during normal washing?
No. The manual says it is enabled only during the production test cycle.
Does it mean the wash is ruined?
No. It points to a switch or wiring issue, not to the laundry.
Can I clear it by pressing keys?
First confirm no test cycle is running, then power the machine off and on.
Need help with Huebsch error code E LP?
A technician confirms the cause on site and gives you the price in writing before any work starts.