Hobart Commercial Dishwasher Wash Arm Alert: Clean the Arm
WASH ARM ALERT on a Hobart LXe dishwasher means the wash arm is blocked or clogged, which would give poor wash results. The display shows prompts to remove and clean the arm, check the nozzles, replace the arm and close the door. Follow the on-screen instructions.
Low: an operator cleaning prompt about a blocked wash arm.
- Code
- WASH ARM ALERT - Remove & clean arm / Check nozzles / Replace arm / Close door
- Maker
- Hobart
- Equipment
- Dish machines
- Applies to
- LXe Series
What does Hobart WASH ARM ALERT - Remove & clean arm mean?
The LXe controller looks at how well the wash arm is delivering water. If the arm is blocked or clogged, the water cannot spray properly and the dishes will not be cleaned, so the machine shows WASH ARM ALERT - Remove & clean arm - Check nozzles - Replace arm - Close door. The alert is a guided message. It tells the operator the order of things to do: take out the arm and clean it, check that the nozzles are clear, replace the arm, and close the door. The manual's action is exactly that: follow the on-screen instructions. A clogged arm is usually caused by food bits, lime scale or detergent residue that settles in the small nozzle openings. Nothing in the manual makes this alert a service call, so it is an operator job unless the alert returns right after cleaning.
Affected models and control systems
Hobart LXe series: LXeC (ML-130191), LXeH (ML-130192), LXePR (ML-130193) and LXeR (ML-130194).
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
- WASH ARM ALERT on the display
- Dishes coming out with food left on them
- Spray pattern weak or uneven when the door is opened after a cycle
Possible causes
Likely causes — what usually sits behind WASH ARM ALERT - Remove & clean arm on this control. A technician confirms which one it is before any part is replaced.
- Wash arm blocked or clogged
- Food debris or seeds lodged in nozzle openings
- Lime scale narrowing the nozzle holes
- Wash arm not seated correctly after the last cleaning
- Strainer left out so debris reached the arm
Safe checks before calling for service
- Take out the wash arm as shown on the display and rinse it under running water.
- Poke each nozzle clear with a soft tool, then check that water runs through freely.
- Refit the arm properly and close the door.
- If the alert returns after cleaning, write down how soon and tell us.
How a technician diagnoses WASH ARM ALERT - Remove & clean arm
- Confirm the alert and check how often it has recurred.
- Remove the arm and inspect the nozzle openings and the arm seat.
- Check the scrap strainer and wash pump suction for debris.
- Look for scale in the wash water path.
- Descale or replace the arm and run a test cycle.
- If cleaning does not clear the alert, the cause lies in the pump or water path, which involves live motor wiring.
- Descaling and checking pump output takes service tools and chemicals.
How WASH ARM ALERT - Remove & clean arm differs from similar codes
WASH ARM ALERT is a blocked-arm prompt that the operator can act on, unlike the SERVICE REQUIRED messages that need a call.
Technical reference
- Maker documentation
- Hobart owner support
- Edition
- FORM 38435 (March 2014)
- Models / control
- LXe Series
- Section
- DIAGNOSTIC/ERROR MESSAGES (page 27)
- 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 Hobart dish machine error codes
Do I need a technician for WASH ARM ALERT?
Not at first. The manual says to follow the on-screen steps and clean the arm.
Why do I keep getting it?
Debris or scale is probably clogging the nozzles again. Clean the strainer and consider descaling.
Can I keep washing?
Results will be poor with a blocked arm, so clean it first.
Need help with Hobart WASH ARM ALERT - Remove & clean arm?
A technician confirms the cause on site and gives you the price in writing before any work starts.