LG Washer Water Too Hot or Cold? Causes & Fix

Quick Answer: Why Your LG Washer Temperature Seems Wrong#

Most likely: if it always runs cold on a hot setting, the cycle may be a ColdWash program by design, or the hot supply is not reaching the machine — a closed hot valve, a scaled inlet screen, or a failed hot solenoid. If it is not hot ENOUGH, it is usually the supply (a water heater set low, or warm summer tap water) plus LG's habit of blending hot and cold. If it runs too hot or swings, suspect a leaking hot solenoid or a drifting thermistor, and a thermistor that fails outright throws a tE code and defaults the washer to cold.

Likely Causes at a Glance#

Walking Through the Diagnosis#

Start by understanding that LG front-loaders (the WM series) do not simply open a hot valve for hot cycles. Many default programs are ColdWash, which uses cold water on purpose and leans on the 6Motion drum action for cleaning, while temperature-selected cycles BLEND hot and cold to a target monitored by a thermistor. So water that stays cold on a Hot setting may be a ColdWash program working exactly as designed — check the cycle first.

If it is genuinely not getting hot water, feel the hot supply hose at the back within a minute of starting a Hot cycle. If the hose never warms, hot water is not flowing: check the hot supply valve, then the hot inlet screen (Sacramento hard water scales the hot side faster than the cold), then the hot inlet solenoid, in that order. If hot water DOES flow but the wash is only lukewarm, the cause is usually supply temperature — a water heater set to an energy-saving level, or summer tap water that is already warm — compounded by LG's blending; set the heater appropriately and run the kitchen hot tap before starting to purge cooled water from the line.

For water that is TOO hot, or a cold cycle that comes out warm, feel the hot hose DURING a cold cycle: if it heats up, the hot solenoid is leaking through and not fully closing. A thermistor reading low will also drive over-blending of hot water, and on heated models a stuck heater relay applies heat continuously. When the thermistor fails outright, LG throws a tE code and, as a safety default, runs cold — replace the sensor in the sump. LG's Smart Diagnosis can report the thermistor reading live, so compare it against a thermometer in the drum to confirm a bad sensor.

Repair or Replace? The Short Version#

Rule of thumb: if the repair comes in under about half the price of a comparable new washer and yours is under eight to ten years old, repair it — an inlet solenoid or a thermistor is an inexpensive, targeted part, and many temperature complaints turn out to be a ColdWash cycle or a supply issue that costs nothing to fix. Our technicians carry LG inlet valves and thermistors and confirm the cause before replacing anything — book a repair.

Frequently Asked Questions#

Why does my LG washer use cold water even when I select Hot?#

Many LG cycles are ColdWash by design and use cold water on purpose, leaning on the 6Motion drum action to clean. Check whether your cycle is a ColdWash program; if you need hot water, pick a cycle that respects the manual temperature setting.

My LG washer is not getting hot enough — what should I check?#

Usually the supply. Set the water heater high enough, run the hot tap at the sink before starting to clear cooled water from the pipe, and remember LG blends hot and cold, so a low supply temperature shows up directly in the wash.

The hot hose warms up during a cold cycle — is that a problem?#

Yes. It means the hot inlet solenoid is not closing fully and is leaking hot water into a cold cycle. Replacing the inlet valve stops the bleed-through.

What does a tE code mean on my LG washer?#

The temperature thermistor has failed or read out of range, so the washer defaults to cold as a safety measure. The fix is replacing the thermistor in the tub sump.