Hobart LXiH Add Detergent

Follow the wires for the contactor coil one of them is connected to a resetable hi limit, press the button on the hi limit to reset

sounds like the wash pipe is no good , i've seen this before

intermittent contact of pressure switch,
replaced the pressure switch first before you replaced the control board.

You can add a small amount commercial dish soap to the wash chamber before pressing the wash button.

This is a bad sump temperature probe. The unit will function, but will not heat nor display the wash water temperature.

This is a very easy fix. Order Hobart part number 328994 from your nearest Hobart parts dept.

Turn off and drain the unit. Kill the power to the unit at the circuit breaker. Remove the lower front cover. Locate the screw-in temperature probe at the front of the sump. Unplug the sensor from the wiring harness, remove with a 7/16" open end wrench. Screw in the new probe, using teflon tape of the threads, snuggly. It does not need to be super tight. Plug it into the harness, reinstall the front cover, turn the breaker back on, and start up the unit.

TURN THE BREAKER OFF AS EVEN WITH THE UNIT "OFF" THERE WILL BE 120 VOLTS PRESENT AT THE SUMP HEATER (yellow wires) DUE TO ONLY ONE LEG OF POWER BEING SWITCHED OFF!

The LX18 series was a compromise machine, the lack of a sump heater causes numerous rinse temperature problems due to it's increased water use (over the sump-heater equipped, fresh water rinse LX30 series).

The LX18H can be reprogrammed for true fill and dump operation. If you still need to do this, please let me know via e-mail or post a reply, otherwise a won't post the long answer!

(I worked for Hobart as a service tech. from 1994 until 1999, and have been independent since then)

Can you be more specific please?

Hold the delime button in and hit the on button for 5 seconds.It will then do a partial fill then it will say add delime,add delime shut the door and press the wash button.Let the machine do the rest it will turn itself off when finished.

E4 indicates water level has not reached top water sensor. Check for proper flow-water pressure to machine (15-25psi) and clean sensor in wash tank

Hobart doesnt release service manuals but you can get an operation/installation manual for free here http://www.hobartservice.com/Manuals/ Im a service tech for hobart so if you have any questions let me know.