9A5 on an LG dryer points to a power supply abnormality detected by the control board. On gas models, verify the outlet is supplying 120V using a multimeter. Check the circuit breaker and confirm no wires are loose at the outlet or junction box.
I've seen this code pop up after a summer storm or when a dryer's running on a circuit shared with a heavy appliance like a freezer. The 9A5 is the control board saying the incoming power is dirty or insufficient. Ignore it and you risk frying the board completely. What I usually see when I show up: a weak breaker that's not fully tripped, or a board that's already toast from a previous surge.
Digital multimeter (AC voltage range required), Phillips #2 screwdriver
What Does the 9A5 Code Mean?
In fifteen years of doing this, LG gas dryers are the most common victims of 9A5. They run on a standard 120V outlet, so they're super sensitive to any voltage drop. Here's the thing though, you've got to rule out your house wiring first. If the wall outlet's the problem, a brand new control board will throw that same 9A5 code the second you plug it back in.
Most Likely Causes
Based on aggregated repair data, here is the probability breakdown for this error code:
Low or incorrect voltage at wall outlet40%
Tripped or weak circuit breaker24%
Loose wiring at outlet, junction box, or dryer terminal block22%
Failed or failing main control board14%
Symptoms You May Notice
9A5 sitting on the display and the dryer flat out won't start no matter how many times you hit the button.
The dryer starts a cycle just fine but shuts down 10 or 15 minutes in and throws 9A5 right when the motor tries to run at full load.
Everything on the control panel lights up normally and you can hear the machine trying to do something, but nothing happens. No drum spin, no heat, nothing.
The display flickers or goes dark randomly, sometimes coming back on its own, like the power's cutting in and out at random.
Can you reset a Lg dryer to clear the 9A5 code?
Kill power at the circuit breaker, don't just unplug the dryer. Actually flip the breaker off. Wait a full minute. While you're waiting, press and hold the Start button on the dryer for about 5 seconds to drain any stored charge from the board. Then flip the breaker back on and try a cycle. If 9A5 comes right back, either the board's voltage sensing circuit has failed or there's still a wiring issue somewhere in that circuit.
Tools Required for Diagnosis
Digital multimeter (AC voltage range required)Phillips #2 screwdriverFlathead screwdriver, small (for connector locking tabs)Needle-nose pliersPhone or camera for photographing wiring before disassemblyFlashlight or headlamp
Diagnostic Checklist
Follow these steps in order. We start with the easiest external fixes before opening up the machine.
ComponentComponent Under Test
Expected Range108–125 VAC
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
Main Control BoardEBR36858904 · $120–$200
EBR36858904
$120 – $200
Frequently Asked Questions
Is 9A5 more common on gas or electric LG dryers?
Gas dryers, no question. I see this on gas units probably three times more often than electric. Gas dryers run on a single 120V circuit, so they're way more sensitive to any fluctuation. If that circuit's shared with a chest freezer or a power tool in the garage, the voltage drop when those things kick on can be enough to trigger 9A5. On electric models running on 240V, this code usually means one leg of the supply has a loose connection at the terminal block or there's a problem at the breaker panel, not the board itself.
How much does it cost to fix LG dryer 9A5?
If it's just a tripped breaker or a loose wire you can tighten yourself, it costs you nothing but an hour of time. An electrician to fix a bad outlet runs $150 to $300 depending on how much work's involved. The main control board, part number EBR36858904, is around $120 to $150 online. If you're having a tech do the whole thing, expect $300 to $400 all in with the service call. Beats buying a new dryer though, which is going to run you $700 to $1200 for a comparable model.
Can a power surge cause 9A5 permanently?
Yeah, definitely. I replaced three boards last month alone after a bad storm came through our area. A surge can blow the tiny voltage-sensing resistors on the board and they don't self-heal. Even if the dryer seems to work sporadically after a surge, that board's compromised and it's just a matter of time. Get a surge protector for your laundry appliances. They make ones rated for dryer outlets and they're around $30 to $40, which is way cheaper than a new control board.
My dryer shows 9A5 but my outlet tests fine. What now?
This happens more than you'd think. The outlet tests fine with no load but drops below the threshold when the dryer's actually pulling current on startup. The real test is checking voltage while the dryer's trying to run, which is harder to do safely. At that point I usually just inspect the board closely for visible damage and swap it if it's in the 7 to 10 year age range. The board can also develop a fault in its voltage sensing circuit even when the incoming power is completely fine, so a good wall test doesn't always clear the board.
How long does the LG dryer control board last?
Typically 8 to 12 years on the ones I've worked on, assuming no major power events hit it. The capacitors on these boards wear out over time, they're only rated for so many charge cycles. If your dryer's in the 7 to 10 year range and throwing 9A5 on a circuit that tests perfectly fine, I'd just order the board and be done with it. Part number EBR36858904 if you've got one of the affected models. Chasing other causes at that point is usually just wasting your time and money.