Repair guides
Pick a type, an appliance or a brand. Every guide lists the tools, the safety call-outs, the steps and the reading you should expect.
Diagnostic · 374
Symptom → most likely cause, step by step
Component tests · 69
How to test a specific part, with expected readings
Installation · 33
Install, replace and hook up appliances correctly
Fundamentals · 24
Core skills every appliance tech uses
Appliance
Brand-specific guides
31 guides for LG
Refrigerators · 3
Guide · RefrigeratorLG Craft Ice not making round ice
Craft Ice is slow by design and needs a cold freezer, water and the right mode. Rule out start-up time, mode setting and bin position before blaming the Craft Ice module.
Guide · RefrigeratorLG linear/inverter compressor fridge not cooling
Rule out demo mode, airflow, fans and defrost first, then use LG's forced-run diagnostic to see whether the compressor runs. If the compressor runs but doesn't cool, or won't start with a good board, it's a sealed-system failure: refer it to LG service or an EPA 608-certified technician and check the compressor warranty.
Component test · RefrigeratorRefrigerator inverter compressor board: what is safe to check
Inverter boards make variable-frequency 3-phase power for the compressor. Electrical checks of the board and compressor terminals are allowed; anything that opens the sealed refrigerant system is EPA 608 work and blocked. Boards fail more often than compressors.
Washers · 6
Guide · WasherLG LE code: testing the hall sensor and stator
LE means the board drove the motor but did not see rotation. Check the harness, then test the hall sensor (about 10 kΩ per channel and a pulsing signal), then the stator windings, before condemning the board.
Guide · WasherReading stored codes and service/test mode (overview)
Entry sequences differ by model and generation. Always confirm on the tech sheet inside the cabinet; the sequences below are examples reported for specific model families.
Guide · WasherTop-load not agitating (fills and drains OK)
On older Whirlpool/Kenmore direct-drive top-loads, fill-and-drain-OK but no agitate/spin is the classic broken motor coupler. On newer models, look at the shift actuator/clutch, lid lock and motor.
Guide · WasherWasher-dryer combo washes but does not dry
Combos are ventless and dry slowly. Clean the condenser/lint path, check load size and power (many need 240 V), then check heater or heat pump.
Component test · WasherRotor position sensor (direct-drive motors)
On direct-drive motors the rotor position sensor sits on the stator and tells the inverter where the rotor magnets are. A bad sensor, cracked connector or water ingress gives motor errors even with good windings.
Component test · WasherWasher motor control unit / inverter board
Direct-drive and inverter washers use a motor control unit (MCU) that powers a 3-phase motor and reads a hall sensor or tach. Separate MCU, motor windings, hall sensor and harness before buying a board.
Dryers · 5
Guide · DryerDryer steam features not working
Steam dryers use a feeder or a hose supply. Check water, inlet filter and valve, then the steam generator thermistor.
Guide · DryerDryer will not connect to the app (Wi-Fi)
Most cases are 2.4 GHz network, registration or router issues; a few are module faults.
Guide · DryerHeat-pump (ventless) dryer drying poorly
Heat-pump dryers are slower than vented dryers by design. Real faults are usually clogged lint or condenser filters, a blocked drain path, or a cold room. The refrigerant circuit is sealed: diagnosis only.
Guide · DryerLint filter not detected or lint filter codes
Several dryers sense the lint filter. Seat the filter fully, clean it, then check the sensing switch.
Guide · DryerVentless dryer water tank and condensate codes
Condenser and heat-pump dryers collect water in a tank or pump it out. Empty tank, clean float, clear hose.
Ranges & Ovens · 1
Air Conditioners · 6
Guide · Air ConditionerMini-split communication error: interconnect wiring check
Most communication faults are wiring: swapped terminals, loose screws, splices or damaged cable, often after a new install or a storm. Check power, then terminations at both ends, then the data signal, before replacing a board.
Guide · Air ConditionerMini-split indoor unit blinking light (reading the code)
A blinking pattern is a fault code. Count the blinks before you reset power, because a breaker reset erases the code. Then look it up for the brand and fix the cause.
Guide · Air ConditionerPortable AC shows water-full code or keeps filling
In humid weather or dry mode, a portable can collect water faster than it evaporates it. Drain and set up a continuous drain first; a code with an empty tank points to the float switch or internal pump.
Guide · Air ConditionerPTAC error codes: how to read and clear them
Most PTAC brands store fault codes that can be shown with a button combination on the control (for example GE Zoneline uses a MODE + another key sequence on some models). Read the active code, fix the cause, then clear it.
Guide · Air ConditionerPTAC not cooling (fan runs, air not cold)
Most PTAC no-cool calls are airflow (filter, coils), a wrong control setting or a failed compressor start component. Rule those out before suspecting the sealed system.
Component test · Air ConditionerMini-split outdoor inverter board: what is safe to check
Mini-split outdoor boards rectify line voltage to a high DC bus and drive the compressor and fan. Field checks are input power, communication, error codes and compressor winding balance. Board DC bus voltage is dangerous after shutdown.
TVs · 10
See all 10
Guide · TVApps freeze, crash or won't load
Separate network from app: test on a phone hotspot. One app failing is usually the app; all apps failing points to network or TV software.
Guide · TVAudio out of sync with picture (lip sync)
Check whether it's every source or one channel. Use the TV's AV sync / bypass controls, the soundbar's own delay, and PCM output.
Guide · TVBluetooth / smart remote won't pair
Smart remotes use Bluetooth/RF for most keys and IR only for a few (often power). Fix batteries first, then reset and re-pair close to the TV sensor.
Guide · TVFirmware update or recovery from a USB drive (Samsung, LG)
Samsung and LG let you load the model's update file from a USB stick. The format and folder rules are strict; most failures are a wrong file, wrong folder or wrong format.
Guide · TVFlicker only in HDR / Dolby Vision or from one HDMI source
Usually the enhanced HDMI mode (LG HDMI Ultra HD Deep Colour, Samsung Input Signal Plus) with a cable, hub or source that can't hold the bandwidth.
Guide · TVOLED image retention or burn-in
Short-term retention usually clears on its own once the TV's automatic compensation runs at power-off. One manual refresh is the next step; if the ghost survives, it is permanent panel wear and the fix is a panel.