An Er code on an LG refrigerator is the board naming a circuit it lost track of. It is a lead, not a verdict.
Monday–Friday 7:30–5:30 · Saturday 8–1 · closed Sunday
Refrigerator & Freezer Repair$99 with a meter · rides inside the repair
Washing Machine Repair$99 with a meter · rides inside the repair
Clothes Dryer Repair$99 with a meter · rides inside the repair
Dishwasher Repair$99 with a meter · rides inside the repair
Range, Oven & Cooktop Repair$99 with a meter · rides inside the repair
Ice Maker Repair$99 with a meter · rides inside the repairLG put a lot of French-door and door-in-door refrigerators into the subdivisions that went up off Middleton Rd, along Ustick Rd in Caldwell and around Ten Mile Rd in South Meridian between 2015 and 2025. Older LG side-by-sides are still running in the 1990s houses along Greenhurst Rd. Nearly all carry a linear or inverter compressor and a board that watches every fan and sensor in the cabinet. When one of those readings goes missing, the display flashes Er and two letters. That pair of letters is the board’s shorthand for the circuit, not a name for the broken part, and reading it as a parts list is how a good refrigerator gets a new board it did not need.
Canyon County adds its own wear. Well water in Star’s river-bottom acreage and across the Snake in Marsing carries iron and grit that chokes an LG flow meter and the ice maker valve until the board reports a flow fault. Feedlot dust and cottonwood fluff off the fields near Notus pack a condenser until the compressor runs hot through a July afternoon. The other direction hurts too: an LG in an unheated Caldwell garage during a December inversion sits at 35 degrees, the fresh-food side never calls for cooling, and the freezer thaws without a single code. Add the summer thunderstorm outages, and the boards in these boxes see plenty of reasons to post Er CO.
| Code | What the display means | Usually behind it | Safe to check first | What we do |
|---|---|---|---|---|
| Er FF | The freezer fan is not turning, or the board cannot see it turn. | Ice locking the fan blade after a defrost failure, then the fan motor, then a pinched harness where it passes the hinge. | Pull the plug for a couple of minutes, plug it back in and put your ear to the freezer wall for the fan starting. | We take the freezer back wall off, look for ice on the blade, put the meter on the motor and the wiring feeding it, then replace either the fan or the defrost part that let the ice build. |
| Er rF | The fresh-food fan has stopped or stalled. | The fresh-food fan motor, then frost from a leaking door gasket, then the connector at the fan. | Run a hand along the fresh-food door gasket for a gap or a torn corner that lets warm air in. | We meter the fan motor and check the gasket seal, then replace the fan or the gasket, whichever the test points at. |
| Er dH | Defrost ran but the heater never brought the coil up to temperature. | The defrost heater, then the defrost sensor and its fuse, then the board relay that feeds the heater. | Look at the back wall inside the freezer. A frost blanket that grows over a week backs this code up. | We meter the heater, the sensor and the thermal fuse, force a defrost cycle from the board, and replace the part that failed the test. |
| Er dS | The defrost sensor is open or shorted. | The sensor clipped to the evaporator, then its connector, then the main board input. | Pull the plug for two minutes. If Er dS comes right back, it is a part, not a glitch. | We check the sensor against its resistance chart at a measured temperature and replace it, or repair the harness if the sensor is fine. |
| Er 1F | The ice-room fan is not moving air. | Ice grown over the fan in the ice compartment, then the fan motor, then the duct blocked by a leaking ice-maker fill. | Lift out the ice bin and look for frost on the compartment walls or an ice sheet under the maker. | We thaw the ice room, meter the fan, check the fill line for scale and overfill, and replace the fan or fix the fill fault. |
| Er CO | The main board and the display board have stopped talking to each other. | A power blip during a storm, then a loose connector at the top hinge, then the display board or main board. | Cut the power for two minutes and see whether the display returns to a temperature. | We test the harness through the hinge for continuity, meter the supply to the display, and replace the board that fails. |
| Er IS | The sensor inside the ice maker is reading outside its range. | The ice maker sensor, then ice on the sensor from a stuck fill valve, then the ice maker assembly. | Empty the ice bin and see whether the maker is buried in frost or sitting in a pool of frozen water. | We meter the sensor, test the fill valve for scale and dribble, and replace the ice maker assembly or the valve. |
| Er gF | The flow meter saw too little or too much water going to the ice maker and dispenser. | A clogged water filter or a filter installed off its seat, then a scaled inlet valve, then the flow meter itself. | Check the water filter date. A filter past six months on Nampa city water is the first suspect. | We measure flow at the dispenser, meter the inlet valve, test the flow sensor, and replace the valve or sensor. We do not sell filters; we tell you which one to buy. |
| Er rS | The refrigerator-side temperature sensor reads open or shorted. | The thermistor, then its connector, then the board that reads it. | Set a thermometer on the middle shelf overnight. A reading above 40 degrees with this code means do not wait on it. | We meter the thermistor at a known temperature, compare it to the chart, and replace it or repair the wiring to it. |
| Er FS | The freezer temperature sensor is out of range. | The freezer thermistor, then a frost-covered sensor from a defrost problem, then the connector. | Check whether the ice cream is soft. A soft freezer with this code means the board is running blind. | We meter the sensor, inspect the evaporator for frost, and replace the sensor or the defrost part that iced it. |
| Er CF | The condenser fan under the refrigerator is not running. | A fan motor packed with dust and fluff, then a failed fan motor, then the board output. | Look at the grille at the bottom front. A mat of dust and pet hair across it is the local cause. | The condenser gets cleaned first; then the fan motor is metered along with the board output, and a seized fan is replaced. |
| Er It | The ice maker tray motor could not finish its twist. | Ice bound in the tray, then the tray motor, then the sensor that tells the board the tray is home. | Take out the ice bin and confirm nothing is wedged between the tray and the bin opening. | We start the ice maker test from the panel and watch the tray twist; a motor or home sensor that fails the test means a new ice maker assembly. |
The visit starts with the code and its history. LG boards keep the last faults, and the order they were logged in tells us whether a fan died on its own or was iced over after a defrost heater quit. We write the list down, clear it, and push the refrigerator through a forced defrost or a fan test to make the fault show itself. Then the meter goes on the component the code names, plus the two things beside it. A sensor code gets the sensor measured against its chart, but also the connector and the board input, because a corroded pin posts the same code as a dead sensor. A flow-meter code gets the water measured at the dispenser before anyone talks about the sensor.
We are independent. Syringa does not sell LG refrigerators and is not LG’s dealer; we meter and repair them for the people who own them. When a refrigerator is young enough that the maker’s own coverage may still apply, especially on the sealed system, we tell you before the $99 is spent. Fans, thermistors, defrost heaters, inlet valves and gaskets are on the truck. Boards and ice maker assemblies for the newer door-in-door models usually have to come in, and the second visit to install one carries no charge of its own. Nothing gets priced until the diagnosis is finished; then the number is written out, and your $99 is already a piece of it the moment you say yes.
Er dH means the defrost heater did not warm the coil far enough in the time allowed. The freezer stays cold for a while because the compressor keeps running, but frost builds on the coil until air stops moving and the fresh-food side warms. In a Middleton subdivision house we usually find the heater or its sensor failed; the meter says which.
Often, yes. A summer thunderstorm that flickers the lights along Hwy 44 can interrupt the two boards mid-conversation. Cutting the power for two minutes lets them restart together. If Er CO returns on its own, a connector through the top hinge or one of the boards is failing, and we test which before ordering anything.
A garage in Caldwell in January sits near the point where the fresh-food thermostat is satisfied all day. No cooling call, no compressor, and the freezer drifts up without any circuit reading wrong, so no code posts. Some LG models can be set up for a cold room; others cannot, and telling you which is part of the $99 visit rather than a reason to sell a repair.
It can. Nampa city water and the well water south of Lake Lowell scale the inlet valve and the fill tube. The valve dribbles, the tube freezes, the ice-room fan ices over, and the board posts Er 1F or Er IS. The fix is the valve and a thaw, and a softener with salt in it keeps it from coming back.
Every time. The stored codes are read and written down, then cleared, then the refrigerator is run through a forced cycle to reproduce the fault. Parts are replaced only after the meter agrees with the code. That testing is what the $99 buys, and once you approve the work the $99 becomes part of the total.
Plain meaning of each code, what tends to be behind it here, one check you can make, then our part
Open the code list →Plain meaning of each code, what tends to be behind it here, one check you can make, then our part
Open the code list →
Plain meaning of each code, what tends to be behind it here, one check you can make, then our part
Open the code list →The phone is quicker; the form lands on the same desk. Both get you a text with a window, and until a technician has had a meter on the machine the only figure anyone quotes is $99.
Open the request formRing the shop or fill in the form; dispatch answers with a window, and a text follows as the truck pulls off Davis Ave — first stops go to the Boise commuters, Saturday mornings to everyone else.
Measurements come before opinions: amps at the compressor, degrees on the shelf, ohms across the element. The failed part gets its everyday name from the technician, who then writes the repair as a single figure, $99 folded in.
The shelves on the truck hold what this valley wears out — inlet valves, defrost heaters, heating elements, igniters, drain pumps, rollers. When something must be ordered, the return trip happens on our calendar and the figure you approved stands.
The machine runs a whole cycle while you watch, panels and floor go back the way they were, and the invoice that reaches your email carries the warranty term.
$99 puts a meter on the machine. The repair goes on the ticket as one figure with that $99 inside it, the part is usually riding in the truck, and the invoice states the warranty term. Parma pays what Davis Ave pays.