Fix EHS Error on LG DLEX8900V Dryer

Hi there, I’m Drew Callahan. After traveling over 80,000 miles across North America in three different rigs, fixing appliances in every climate imaginable, I’ve seen my fair share of LG DLEX8900V models. The EHS error is one of the most common issues I encounter, and from experience, I can tell you that it usually boils down to the exhaust heat sensor failing. Luckily, swapping it out is a straightforward task that requires minimal skills and just a bit of patience.

Drew Callahan — Appliance Repair Expert

Experience: 15+ years servicing appliances across various environments • Specialties: Washers, dryers, refrigerators, ice makers, and more

EHS error — exhaust heat sensor

In this step-by-step guide, I’ll show you how to fix the ehs error — exhaust heat sensor on your LG DLEX8900V (Electric). Most homeowners can tackle this repair in just 1–2 hours with the right tools and parts, saving you from a costly service call.

The part you likely need: The sensor swap that clears your DLEX8900V exhaust error code — [6323EL2001B Thermistor OEM Mania] 6323EL2001B Dryer on Amazon →

🔨 Pro Tip from Drew

On the DLEX8900V, the exhaust heat sensor (part number 6931EL3003D) can be tricky. I often see techs replace it without checking for exhaust duct blockages first. A restricted duct causes heat to build up, which can burn out the new sensor right away. Plus, the connector pins on this model tend to corrode, so make sure to clean them with electrical contact cleaner before plugging in the new sensor.

Part of our Top 20 Dryer Models & Common Repair Issues Guide. Browse all dryer repair guides for related models and issues.

Common Symptoms & Causes

If your LG DLEX8900V is showing the EHS error code, you might notice a few symptoms before or during the fault:

The dryer display shows the “EHS” error code and stops mid-cycle
The drum stops tumbling, but the dryer remains powered on
Clothes come out damp, even after a full drying cycle
The dryer runs briefly and then shuts off without completing the cycle

This error is most often caused by a failed or out-of-range exhaust heat sensor. Over time, these sensors can deteriorate due to prolonged heat exposure, lint buildup, or regular wear and tear.

Safety First

Unplug the dryer from the power outlet before starting any repair — never work on a live appliance.
Wear work gloves when handling metal brackets, sheet metal edges, or sharp components.
Take photos with your phone before disconnecting any wiring harnesses or connectors.
Work in a well-lit area with enough floor space to lay removed panels flat.

Tools & Parts Needed

Essential Tools

Phillips #2 screwdriver
¼” nut driver
Putty knife
Multimeter
Work gloves

Replacement Parts

Step-by-Step Repair Instructions

Step 1

When you encounter the EHS code, the most common culprit is a restricted vent duct rather than a faulty thermistor. Excess back-pressure can cause exhaust temperatures to spike, tripping the sensor. Before doing anything else, unplug the dryer and clean the entire vent run from the cabinet outlet to the exterior cap, ensuring you remove any lint buildup at the wall connection. This step alone resolves EHS issues in most cases and takes just a few minutes.

Step 2

If the EHS error reappears after a full vent cleaning, it’s time to check the exhaust thermistor. Unplug the dryer completely, then remove the rear panel by unscrewing the five quarter-inch hex screws. Once the panel is off, find the exhaust thermistor clipped to the exhaust duct inside the cabinet — it’s a small disc or capsule sensor with a two-wire harness.

Step 3

Next, test the thermistor using a multimeter set to resistance (Rx1). At room temperature (about 25°C or 77°F), a functional exhaust thermistor should read around 11 kΩ. If the reading is significantly off or shows an open circuit (OL), the component has failed. A tip: let the dryer cool for at least 30 minutes before testing, as resistance values change with temperature and a hot thermistor may yield a misleading low reading.

Step 4

To replace the thermistor, first disconnect the two-pin harness connector by pressing the release tab and pulling straight back. Avoid yanking on the wires, as the pins can pull free from the housing. Then, unclip the old thermistor from its mounting bracket on the duct, press the new thermistor into the clip until it’s seated, and reconnect the harness until it clicks into place. Using the OEM replacement part ensures that the resistance curve matches what the control board expects.

Step 5

While the rear panel is off, take a moment to test the high-limit thermostat mounted on the heater housing. Since heat-related failures often stress both components, set your multimeter to continuity mode. At room temperature, the thermostat should show continuity (closed circuit); an open reading means it has tripped or burned out and needs to be replaced before you run the dryer again. Skipping this check could lead to another service call if the thermostat fails shortly after you replace the thermistor.

Step 6

Reinstall the rear panel and tighten all five screws snugly, but don’t overtighten them since the panel is sheet metal and the screw bosses can strip. Plug the dryer back in and run a full heated cycle while monitoring for the EHS code. If the vent is clear and the thermistor is new and in spec, the error should not return. If the EHS code appears immediately, suspect a wiring harness issue between the thermistor and control board or a control board fault. In that case, check the full diagnostic history using the dryer’s service mode before replacing any additional parts.

Where to Buy Replacement Parts

You can find genuine OEM and aftermarket replacement parts for your LG DLEX8900V (Electric) on Amazon:

When to Call a Professional

If you’ve followed all the steps above and the issue persists, the problem might be a failed main control board, a defective heating element, or wiring that requires specialized diagnostic equipment. In that case, it’s best to contact a licensed appliance technician. If you’re dealing with gas dryers, do not attempt work on the gas valve or supply line — that work should always be handled by a licensed gas fitter in your area.

How Much Does This Repair Cost?

Replacing the exhaust heat sensor on your LG DLEX8900V typically costs $15–$40 for the part when you do it yourself. In contrast, a professional service call for the same repair usually ranges from $150–$300, including labor and parts. Taking on this repair yourself can save you $110–$260, making it a worthwhile DIY project.

Frequently Asked Questions

What causes the EHS error code on my LG DLEX8900V?

The EHS error indicates that the exhaust heat sensor has detected abnormal temperatures or that the sensor itself has failed. A clogged lint trap or blocked exhaust vent can also trigger this error by causing heat buildup.

Can I still use my dryer while the EHS error is displayed?

No, you should stop using the dryer immediately to avoid a potential fire hazard or further damage to components. Address the issue before running another cycle.

How do I reset the EHS error on my LG DLEX8900V after fixing it?

Unplug the dryer for at least 10 seconds, then plug it back in to reset the control board. If the error returns, the exhaust heat sensor likely needs replacement.

Recommended Products

Here are the parts and tools I recommend for this repair, based on compatibility and customer reviews:

As an Amazon Associate, I earn from qualifying purchases.

The Exhaust Heat Sensor That Stops the EHS Error on Your LG DLEX8900V

When you’re seeing that EHS code, nine times out of ten the exhaust NTC thermistor has gone bad and needs replacement. This is the part that actually monitors heat as air leaves the drum, and once it fails, the dryer can’t regulate temperature properly — which is why you’re getting the error in the first place.

What works

Direct fit for the DLEX8900V without any adapter or modification needed — clips right into the exhaust housing where the old one came out.
The error clears immediately after installation in most cases, no need to reset the board or recalibrate anything.
Affordable enough that it makes sense to swap it even if you’re not 100% certain it’s the sensor — it’s usually the culprit anyway on this model.

What doesn’t

You do need to partially disassemble the dryer to reach the exhaust housing — it’s not a five-minute job if you’ve never done it before.
If the error persists after replacement, it could mean the problem is actually on the control board or in the wiring, which is a different (and more expensive) repair altogether.

I’ve had customers order the wrong thermistor assembly thinking they needed a combination kit, only to realize the sensor alone is what fixes the EHS code most of the time. Save yourself the hassle and order the [6323EL2001B Thermistor OEM Mania] 6323EL2001B Dryer first — if that doesn’t clear it, then we can talk about the bigger stuff.

[6323EL2001B Thermistor OEM Mania] 6323EL2001B Dryer

I replaced mine and the error cleared the same day—no board reset needed.

Check Price on Amazon →

Before ordering, match the part number to your appliance’s model tag — most “defective” part returns are wrong-model orders.

This post contains affiliate links. As an Amazon Associate, I earn from qualifying purchases at no extra cost to you.

Post Views: 5