Er 22 Error on LG InstaView Refrigerator? Comprehensive Fix Guide

I’ve seen this a hundred times in the field. You’re likely looking at a fridge that’s still lit up beautifully behind that glass panel, but your ice is melting and the back of the unit is dead silent. Don’t go shopping for a new unit just yet; this is a diagnostic hurdle, not a death sentence for the appliance. We can troubleshoot this together.

Symptoms of a Failing Compressor Relay

When Er 22 hits your LG InstaView, it rarely happens in total silence. You might notice the display panel flashing the code intermittently before it stays on permanently. Inside the cabin, your water dispenser might still provide liquid, but it won’t be chilled. The most telling sign is the lack of vibration from the bottom rear of the unit; normally, an LG linear compressor has a faint hum, but with an Er 22, that hum is replaced by an eerie silence or a periodic “click” every few minutes as the board tries—and fails—to engage the cooling cycle. Your “InstaView” light will likely still work, which misleads many folks into thinking the power is fine, but the cooling system itself has effectively gone on strike.

The Complete Solution

1. Safety First and Power Down: Before you touch a single screw, pull the refrigerator away from the wall and unplug it. WARNING: Control boards store electricity in capacitors even when unplugged. Give the unit at least 10 minutes to discharge before you start poking around.
2. Access the Main Control Board: Head to the back of the fridge. You’ll see a metal cover plate, usually held in by 2-4 Phillips head screws. Remove these and set them aside in a secure bowl. Once the cover is off, you’ll see the PCB. Look for any visible signs of trouble: black scorch marks, a “fishy” electrical smell, or capacitors that look “swollen” like a soda can about to pop.
3. The Multimeter Continuity Test: Set your multimeter to the Ohms (Ω) or Continuity setting. You are looking for the relay—it’s usually a black or clear rectangular box soldered to the board. If you’re comfortable, you’ll want to test the resistance across the relay terminals. If you see “O.L” (Open Loop) when the circuit should be closed, the relay has failed. If the board looks physically charred, don’t bother testing; the board needs replacement.
4. Check the Compressor Start Relay: While the back is open, move down to the compressor itself. Remove the plastic cover on the side of the compressor. This is the “Start Relay” or PTC thermistor. Pull it off and give it a shake. If it rattles like a broken lightbulb, the internal ceramic disk has shattered. Replace this part immediately.
5. Installing the Replacement: If the diagnosis points to the Main Board, unplug the wiring harnesses carefully—pull by the plastic housing, never the wires. Snap the new board into the plastic standoffs and reattach the harnesses until they “click.” This ensures a solid connection that won’t vibrate loose.
6. The Reboot Phase: Once everything is buttoned back up, plug the unit in. The Er 22 should be gone. Listen closely for the compressor to kick in (this may take 2-5 minutes as the board runs a self-diagnostic).

What Triggers this Code?

In my experience, Er 22 isn’t usually a “random” glitch. It’s a hardware response to one of three specific failures. First, and most common, is Contact Pitting or Welding on the main control board relay. These relays are mechanical switches; over years of clicking on and off, the internal metal points can burn out or stick due to electrical arcing. When the board can’t confirm the relay has closed, it throws the code to prevent further electrical damage.

Second, we often see Voltage Spikes or “Dirty” Power. Modern LG InstaViews are essentially giant computers that keep milk cold. If your home experienced a brownout or a local power surge, the sensitive capacitors surrounding the compressor relay on the PCB (Power Control Board) can blow. Finally, Wiring Harness Fatigue can be a culprit. While rare, the vibrations from the fridge can occasionally loosen the pin connectors at the compressor’s start device or the main board, breaking the continuity the fridge needs to see to stay operational.

How to Prevent Error Er 22

If you want to keep this from happening again, you need to treat your fridge like the high-end electronics it is. First, install a dedicated Appliance Surge Protector. A standard power strip isn’t enough; you need something rated for the high inrush current of a compressor to shield the PCB from grid fluctuations.

Second, clean your condenser coils every 6 months. When coils are caked in dust and pet hair, the compressor has to run longer and hotter to maintain temperature. This puts massive strain on the relay, causing it to cycle more frequently and wear out the mechanical contacts prematurely. A clean fridge is a fridge that doesn’t have to “click” its relay nearly as often.

Frequently Asked Questions

Q: Can I just “reset” the fridge to fix Er 22?
A: You can try a hard reset by unplugging the unit for 10 minutes, but with Er 22, this is usually a temporary band-aid. The code indicates a hardware communication failure. If it goes away and comes back, your relay is in the process of failing and will eventually quit entirely, likely when you’re out of town.

Q: Is Er 22 covered under LG’s 10-year compressor warranty?
A: Generally, no. The 10-year warranty usually covers the “Linear Compressor” pump itself. Er 22 is an electrical fault on the control board or relay. However, if the relay failed because the compressor was drawing too much amperage, a savvy tech might get it covered. It’s worth a call to LG, but be prepared for them to say no to the electronics portion.

Q: Is it safe to leave the fridge running with this code?
A: It’s not “dangerous” in terms of fire risk, but it is “dangerous” for your food. Since the compressor isn’t running, your internal temperatures will rise to room level within 4-6 hours. If you see Er 22, move your perishables to a cooler immediately.