I use this dishwasher in a florist to clean wax out of candle glass and recently it is not working. E4 codes appear, and it over flows sometimes.

SOURCE: Hobart commercial under the counter diswasher LXIC

Q have your run a descaler . to rid the machine of its deposits . in order for the machine to run properly the parts and pump / screens must be clean . / descaling for deliming . dishwasher and icemakers is common practice . and then i belive the light will not come on . .. hope this helps mm feed back pls

SOURCE: Hobart commercial under the counter

The machine is trying to tell you to delime it. After a certain number of wash cycles, the LXI dishwasher reminds you to run a delime cycle (instructions are on a label on the bottom of the dishwasher). Judging from your posting, it's been ignored for quite some time, so you may need to run multiple delime cycles, depending on how much scale is built up inside the machine on the probes, wash arms, rinse arms, drain body (though you can't see this part, heavy scale deposits will cause draining problems). So . . . . get some good strong delimer and run a few delime cycles (talk to your chemical supplier about delimer - don't buy some weak stuff like LIME-A-WAY off the shelf).

Once you've delimed the machine, your E4 code may go away. E4 is the dishwasher's way of telling you that it did not fill properly on the initial fill (when you first turn on the machine). More specifically, it means the dishwasher DID NOT SENSE WATER at the upper probe at the rear right of the tank (there are two probes back there, on one assembly, referred to as the MIDDLE and UPPER water level probes). The probe may be coated with lime causing difficulty sensing water at the probe, so a good deliming may clean the probe and fix the E4 problem (in fact, reach back to the probes and break off any heavy built-up lime/scale deposits before deliming). If the E4 code persists after deliming, watch the pressure gauge on the front of the dishwasher. If the gauge reads lower than the green area, you need to adjust or replace the water pressure regulator. If the E4 problem still persists, replace the probe assembly at the rear of the dishwasher.

David

• 1 Answer
• Posted on Oct 05, 2015

SOURCE: Hobart LX15H indicates E4 and will not fill.

Also looking for help troubleshooting our Hobart X18 dishwasher.