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Hobart LXiH error E4 AND part makes noise when OFF

Just installed a used Hobart LXiH. Keep getting error E4. Have tried all 5 solutions in manual. Also (related?) a part is making noise when the LXiH is Off. The noise is a low gurgling about 1 second long, repeating about every 15 seconds. The part is on the outside of the unit in the back, at the extreme top right corner as you face the door. The part has a cap, a bronze conical housing, a solenoid? coming in, an electrical connector going forward under the top panel, and 2 electrical connections down to the vicinity of the 2 water level probes. What is wrong, and how do I fix it please?

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  • Hobart Master
  • 12,223 Answers

Test this steps and fix it. GOd bless you

Drain Pump

If the dishwasher is loud during operation, the drain pump might be defective or might have some debris in it. This is a common problem.


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Circulation Pump

If the dishwasher is loud during operation, and the noise is a continuous drone similar in speed to the circulation pump sound, it's likely that the circulation pump motor bearings have failed. Once this happens the circulation pump will have to be replaced, the bearings are not repairable.


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Drain Impeller

If the dishwasher is loud during operation, the drain impeller might be broken, or there might be debris in the pump. Generally, to gain access to the pump the top of the pump housing will have to be removed.


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Pump and Motor Assembly

If the dishwasher is loud the motor bearings, drain impeller or wash impeller might have worn out. All three of these components are part of the pump and motor assembly. It may be possible to replace one of the impellers, but the motor bearings cannot be repaired. In that case the pump and motor assembly will need to be replaced.


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Wash Impeller

The wash impeller is a small, plastic blade. The motor spins the impeller forcing water through the spray arms to clean the dishes. If one or more blades has broken off of the impeller the dishwasher is loud. The impeller can also scrape against the pump housing if it is damaged, warped or bent.


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Help me find my model number


Circulation and Drain Pump Motor

If the dishwasher is loud during operation, and the noise is a continuous drone similar in speed to the motor sound, it's likely that the circulation and drain pump motor bearings have failed. Once this happens the motor will have to be replaced, the bearings are not repairable.


Enter your model number to see parts for your dishwasher.
Help me find my model number


Water Inlet Valve

The water inlet valve is an electrically controlled water valve. When it is new, the water inlet valve is very quiet. Over time, the diaphragm inside the valve deteriorates and deforms. This deformation interacts with the water rushing in and can cause a loud vibration, buzzing, squealing or other noises. If the dishwasher is loud during the filling cycle, replacing the water inlet valve may solve the problem.

Posted on Jul 23, 2013

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6ya6ya
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Posted on Jan 02, 2017

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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.


this all I can find Machine will not fill or will not fill high enough. (Display shows E0, E2, E3 or E4. Machine will not run). 1. Low water pressure - check for clogged hose strainer; ensure the site water pressure meets minimum flow pressures. 2. Make sure probes are clean. (See Cleaning.) 3. No water pressure - main water supply valves may not be working. 4. Anti-siphon valve - located in the lower left area of the chamber just above the water line. Drain the machine and insert toothpick or similar object into hole to verify ball (3?16" OD) is free to float. 5. Delime machine perhaps the wax is plugging up the floating ball area

Apr 20, 2015 | Hobart 24 in. LXIH-3 Built-in Dishwasher

1 Answer

Hobart LXiH error E4 AND a part makes noise when off


test this steps and fix it. God bless you

Drain Pump

If the dishwasher is loud during operation, the drain pump might be defective or might have some debris in it. This is a common problem.


Enter your model number to see parts for your dishwasher.
Help me find my model number


Circulation Pump

If the dishwasher is loud during operation, and the noise is a continuous drone similar in speed to the circulation pump sound, it's likely that the circulation pump motor bearings have failed. Once this happens the circulation pump will have to be replaced, the bearings are not repairable.


Enter your model number to see parts for your dishwasher.
Help me find my model number


Drain Impeller

If the dishwasher is loud during operation, the drain impeller might be broken, or there might be debris in the pump. Generally, to gain access to the pump the top of the pump housing will have to be removed.


Enter your model number to see parts for your dishwasher.
Help me find my model number


Pump and Motor Assembly

If the dishwasher is loud the motor bearings, drain impeller or wash impeller might have worn out. All three of these components are part of the pump and motor assembly. It may be possible to replace one of the impellers, but the motor bearings cannot be repaired. In that case the pump and motor assembly will need to be replaced.


Enter your model number to see parts for your dishwasher.
Help me find my model number


Wash Impeller

The wash impeller is a small, plastic blade. The motor spins the impeller forcing water through the spray arms to clean the dishes. If one or more blades has broken off of the impeller the dishwasher is loud. The impeller can also scrape against the pump housing if it is damaged, warped or bent.


Enter your model number to see parts for your dishwasher.
Help me find my model number


Circulation and Drain Pump Motor

If the dishwasher is loud during operation, and the noise is a continuous drone similar in speed to the motor sound, it's likely that the circulation and drain pump motor bearings have failed. Once this happens the motor will have to be replaced, the bearings are not repairable.


Enter your model number to see parts for your dishwasher.
Help me find my model number


Water Inlet Valve

The water inlet valve is an electrically controlled water valve. When it is new, the water inlet valve is very quiet. Over time, the diaphragm inside the valve deteriorates and deforms. This deformation interacts with the water rushing in and can cause a loud vibration, buzzing, squealing or other noises. If the dishwasher is loud during the filling cycle, replacing the water inlet valve may solve the problem.

Jul 22, 2013 | Hobart 24 in. LXIH-3 Built-in Dishwasher

1 Answer

E4 error after attempting to fill and get to temp


This is what I found for the E4 code...hope this helps...and thanks for rating my effort...The Fang.


Machine won't fill or won't fill high enough(LX18, LX30 display shows "E0," "E2," "E3," or "E4")

1.Low water pressure — check for clogged hose strainer; check that site water pressure meets minimum flow pressures.
2.Make sure probes are clean.
3.No water pressure — main water supply valves may not be working.
4.Drain valve open - turn machine off to drain machine, then on. Repeat twice (this assists in clearing any drain valve obstructions). Wait for machine to reach READY mode and press WASH. Slowly open door several seconds later and note water level. Close door; 30 seconds later, open door slowly and check that water level is the same as it was. If not, repeat the
OFF-ON procedure.
5. Delime machine.

Apr 28, 2009 | Hobart 24 in. LXIH-3 Built-in Dishwasher

2 Answers

Hobart LX15H indicates E4 and will not fill.


This is what I found in the manual...and on a couple of other sites....

Machine won't fill or won't fill high enough(LX18, LX30 display shows "E0," "E2," "E3," or "E4")

1.Low water pressure — check for clogged hose strainer; check that site water pressure meets minimum flow pressures.
2.Make sure probes are clean.
3.No water pressure — main water supply valves may not be working.
4.Drain valve open - turn machine off to drain machine, then on. Repeat twice (this assists in clearing any drain valve obstructions). Wait for machine to reach READY mode and press WASH. Slowly open door several seconds later and note water level. Close door; 30 seconds later, open door slowly and check that water level is the same as it was. If not, repeat the
OFF-ON procedure.
5. Delime machine.

If this doesn't help let me know and I will get to the bottom of it....good luck and thanks for rating my effort...The Fang.

Apr 27, 2009 | Hobart 24 in. LXIH-3 Built-in Dishwasher

1 Answer

Detergent error


I'm a hobart tech---been away for awhile.What is the model lxih,lx30?Let me know if you still have a problem with it.

Jan 02, 2009 | Hobart 24 in. LXIC-5 Built-in Dishwasher

1 Answer

Hobart dishwasher model LX30H; displays wrench and E4.


Water is not to top sensor in alotted time.
Top sensor is in right rear corner, and is the upper of the two. Check the connector to the probe on the outside at the back. (sometimes gets wet fro vacuum breaker leaking when dirty or low flow pressure. Machine needs 20 psi flow rate

Dec 11, 2008 | Hobart 24 in. LXIH-3 Built-in Dishwasher

1 Answer

Hobart LX18 E4 Error. Where can I get a manual?


this is asensor error unit not filling fast enough or loose connection

Nov 25, 2008 | Hobart 24 in. LXIC-5 Built-in Dishwasher

2 Answers

E-5 error code and no draining or rinse cycle machine less than 3 months old


E5 is a drain error - machine is not draining - check drain hoses - pull out machine if needed - check air gap. hope this helps. jimmy.

Sep 26, 2008 | Hobart 24 in. LXIH-3 Built-in Dishwasher

1 Answer

Hobart lxih


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

Jul 16, 2008 | Hobart 24 in. LXIH-3 Built-in Dishwasher

5 Answers

Hobart LXiH


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.

Dec 03, 2007 | Hobart 24 in. LXIH-3 Built-in Dishwasher

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