LG Dishwasher Code HE: Causes and Solution - Error Lens (2023)

Have you just noticed that your dishes are wet and cold or very hot in your LG dishwasher? While you might be surprised to find your dishes hot or undercooked in the dishwasher, you're not alone; and you are actually experiencing LG Dishwasher HE code which means heater error.

So, if you encounter the HE error code on your LG dishwasher, check to see if there is a heating issue. But hold your horse; Don't rush to the maintenance team just yet, you can solve this problem easily. In this complete guide, you'll learn what the HE code means, what triggers it, how to fix it with DIY tricks, and whether it's worth hiring a technician to help you.

LG HE Dishwasher Code: How Does It Happen?

The LG HE dishwasher code appears when the washing machine overheats or is unable to generate enough heat to function properly. The HE code is displayed on the machine when the water supplied to the dishwasher is heated above 149⁰When the appliance does not get hot enough to wash the dishes. There can be several factors responsible for this issue but it can be fixed quite easily.

But how does the HE problem arise? After explaining that the heating error occurs when the device fails to heat properly or exceeds its 149 limit⁰P, the problem is actually caused by a failure in the heating circuit. A heater circuit malfunction can affect the thermistor and control relay, as well as other washer components, and trigger the HE error code message.

It is worth noting that the HE issue has not been reported on older models of LG dishwashers, only on modern models.

What causes the LG HE dishwasher code?

Several factors can be responsible for your dishwasher not heating properly, some of which are discussed in this section.

1. Defective heating circuit

This has already been mentioned, but for emphasis: a faulty heating circuit affects, among other things, the thermistor and the control relay.

When the device overheats and exceeds 149⁰F, then you should be suspicious of the heating circuit and have it checked by a professional. If the circuit and auxiliary components are not repaired or replaced, the dishes will be damp and cold or very hot and unwashed.

2. Defective pipes

If the plumbing and associated connections in the building are faulty, the water supply will be poor and will cause unnecessary heating problems. If the plumbing is faulty, the hot or cold water supply to the dishwasher may not work properly, which can cause heating issues. It's worth noting that running very cold water through the dishwasher can also trigger the HE code, as the appliance takes a while to heat up the water.

3. Blocked filters, drains and pumps

Blockages in water filters, drain lines, hoses and even air vents can cause unnecessary heating. These clogs can be caused by dirt created by detergent scum and food residue from washed dishes.

Whatever the case, it is important to check filters, drains, pumps and vents for blockages; B. With clogs, the appliance may heat up more quickly and this may trigger the dishwasher code HE.

4. Defective thermistor and pressure switch

Examining the thermistor and pressure switch functionality with a multimeter will tell you if they are working properly. If the thermistor is faulty, the entire heater bracket may need to be replaced as it is beyond repair. This unit provides the dishwasher with adequate heat for its functions.

You will also need to examine the pressure switch if it is responsible for the heater problem. The pressure switch regulates the temperature of the dishwasher and controls the amount of water flowing into the heater. If too little water flows into the heater, the pressure switch may shut off the heater and this may trigger the HE error code. It can also sometimes be helpful to check the pressure switch to ensure it is working properly.

5. Defective wiring harness

Faulty wiring can affect the dishwasher's electrical circuit and cause the HE sign to appear. If the control board wiring is exposed and not sealed, contact and sparking can occur, which can create electrical charges that can damage the entire unit. In a situation where the electrical harness is unstable, the pressure switch will be affected and this will compromise the integrity of the wires when the dishwasher door is opened or closed.

LG HE dishwasher code: how to fix it

LG HE dishwasher code can be fixed without hiring a local handyman. We are going to suggest several tricks that you can try to remove HE notification and get your device working again. Here are some of the tricks you can try:

1. Reboot and restart your computer

If the heating issue is due to a technical error, resetting and restarting the device may resolve the issue. To do this, turn off the dishwasher by holding down the power button.

Turn the breaker off for about 30 seconds before turning it back on. Then turn the machine on and start a new wash cycle to clear the HE error code. However, if that doesn't resolve the issue, try the others listed below in this section.

2. Repair faulty cable connections

If bad wire connections to the control board and heater circuit have been diagnosed as the cause of the HE error, you may want to repair the faulty wire connections.

If you are not good with cables, contact a qualified technician for help. You don't want to cause even more electrical damage by messing with wires you don't know about. An experienced mechanic will repair or replace damaged wiring and wiring harness if necessary.

3. Clean filters, hoses and pumps

As clogged filters, hoses and pumps can lead to heater failure, cleaning the water hoses and draining the pumps would go a long way in solving the problem.

Dirt, deposits and food residue, as well as thick detergent scum, must be removed to allow the appliance to cool down or heat up more quickly. Doing so will effectively remove the HE error code from your washing machine's display screen.

LG HE Fix dishwasher code: do-it-yourself video

When do you call a repairman?

It may not be necessary to call a technician if you're successful with the DIY tricks detailed in this comprehensive guide. But you might consider hiring a technician if you don't have enough technical knowledge to troubleshoot dishwasher heating issues. However, you must understand that you are paying for the technician's service and this can eat into your savings.

Diploma

LG Dishwasher Code HE stands for heater error and is seen when your appliance doesn't heat up fast enough to wash dishes or overheats beyond the recommended 149.⁰limit F. The HE error can be corrected by repairing or replacing the heater circuit, examining the wiring and harness, replacing the thermistor and pressure switch, and cleaning clogged drains and hoses.

Resetting and restarting your dishwasher can also cause the HE error code to disappear from the screen. In the rare event that everything fails, you may need to contact LG customer service or hire a qualified technician to help you.