Kenmore Refrigerator ER 1F Error Code: Freezer Sensor Fault

Quick Answer

Kenmore refrigerator ER 1F means the freezer defrost temperature sensor has failed. The sensor measures the temperature at the evaporator coil to determine when to stop defrost cycles. A failed sensor prevents proper defrost, leading to ice buildup and eventual cooling loss.

I see this code constantly on Kenmore 795 units, which are basically LG fridges with a Kenmore badge. When that defrost thermistor drifts out of range, your evaporator coils turn into a solid block of ice. You'll hear the fan clicking against frost first, then the code pops. Don't ignore it. Give it 48 to 72 hours and you're looking at warm food and a much bigger repair bill.

KenmoreRefrigeratorSeverity: highDifficulty: intermediate80% DIY Success

Time to Fix

30–90 min

Difficulty

intermediate

Parts Cost

$10 – $20

Tools Needed

Phillips #2 screwdriver, Digital multimeter

What Does the ER 1F Code Mean?

Most homeowners panic thinking it's a dead compressor or something way worse. It's not. It's usually this stubborn little sensor sitting right on the evaporator tubing behind the back panel. If your multimeter shows anything outside 5k to 10k ohms at room temp, the part's done. And honestly, it's one of the cheapest fixes you'll make on this fridge.

Most Likely Causes

Based on aggregated repair data, here is the probability breakdown for this error code:

Defrost temperature sensor failed (open or shorted thermistor)40%

Wiring harness to the sensor damaged or disconnected24%

Physical damage to sensor from ice buildup22%

Main control board failed and sending incorrect signals14%

Symptoms You May Notice

ER 1F flashing on the display panel, sometimes cycling on and off every few minutes.
There's a solid sheet of ice covering the back wall of the freezer, thick enough that the evaporator fan blade is hitting it and making a clicking or grinding noise.
Freezer temperature is climbing even though you can hear the compressor running normally.
Ice cream's going soft and food in the freezer section is starting to thaw out.
The fridge section is warming up too, because airflow from the blocked evaporator is completely cut off.

Can you reset a Kenmore refrigerator to clear the ER 1F code?

Unplug the fridge for 10 minutes to clear the error from the display. When you plug it back in, the control board runs a self-test almost immediately. If the thermistor's still bad, ER 1F pops right back within a minute or two. That's actually useful information. A code that clears and stays gone might've been a loose connector. A code that returns instantly means you've got a dead sensor or a board problem.

Tools Required for Diagnosis

Phillips #2 screwdriverDigital multimeterPutty knife or flat panel removal toolPaper towels

Diagnostic Checklist

Follow these steps in order. We start with the easiest external fixes before opening up the machine.

ComponentComponent Under Test

Expected Range5000–10000 ohms

ConditionIf Open (OL) or infinite, replace component.

Replacement Parts

If your diagnostic testing proves the component has failed, you will need a replacement. We recommend OEM parts over aftermarket for water-handling components.

Part Name	OEM Number	Estimated Price
Kenmore / LG freezer defrost sensor6615JB2002A · $10–$20	6615JB2002A	$10 – $20

Frequently Asked Questions

Can I clear ER 1F on a Kenmore 795 by unplugging the refrigerator?

Unplugging might clear the screen for a few minutes, but it's not a fix. The Kenmore control board runs a diagnostic check every time it powers up. Since ER 1F is triggered by a physical failure in the sensor circuit, the board sees the open or short signal immediately and throws the code right back at you. If the code returns within a minute or two of plugging back in, you've definitely got a bad sensor or a wiring issue. You have to fix the hardware to make it stop.

How much does it cost to replace the ER 1F sensor on a Kenmore 795?

DIY route, the sensor itself usually runs $15 to $30 for an OEM part. It's honestly one of the most affordable repairs on these units. If you call a pro, you're looking at a service call plus labor, which typically lands between $150 and $250 total. Given how straightforward the access is once you pull that back panel, it's a solid beginner repair. Don't pay someone $200 to do a $20 part swap that takes 30 minutes.

Is ER 1F dangerous or will food spoil quickly?

It's a high-priority issue. The compressor's still running so it doesn't feel urgent, but the evaporator's stopped defrosting. Within 48 to 72 hours, the ice buildup gets thick enough that air can't circulate. Ice cream goes soft first, then milk in the fridge section starts warming up too. Move your perishables to a cooler as soon as you see this code. Don't gamble on it clearing itself, because it won't.

The ER 1F sensor tests fine on a multimeter but the code keeps coming back. What else could it be?

If the sensor ohms out correctly at room temp, look at the wiring harness next. Follow it from the sensor all the way to the control board and look for spots where it's pinched against a sharp edge or cabinet wall. A wire that's partially cut will sometimes pass a static resistance test but fail under the vibration of normal operation. If the harness looks clean, the problem's probably a bad solder joint on the sensor input pins of the main control board. Look for burnt spots or puffed capacitors on the board.

Is ER 1F the same as LG error code 1F?

Exactly the same code, same component, same fix. Kenmore refrigerators with a model number starting in 795 are built by LG. They use the same internal parts, the same software, and the same error logic. If you're searching for repair videos or trying to find compatible parts, searching 'LG refrigerator 1F error' gets you the exact same procedures and parts. LG part number 6323EL2001B is the thermistor that fits a lot of these units.

Related Kenmore Refrigerator Error Codes

Code: HUBKenmore Refrigerator Error Codes: 795 Series (LG Platform) Guide Code: ER RFKenmore Refrigerator ER RF Error Code: Refrigerator Compartment Sensor Fault

Same Fix on Other Brands

Lg refrigerator1F: LG Refrigerator 1F Error Code

Models Known to Experience ER 1F Errors

This repair applies to most Kenmore refrigerators with this error code. Common model numbers include:

795.72483, 795.72057, 795.51833, 795.72493, 795.72043, 795.51843, 795.74023

Written by

Mike Sullivan

Lead Appliance Repair Technician · 20 years experience

Last verified for technical accuracy on March 14, 2026