LGRepair Miami
(305) 419-0291 Book a visit

Common Problems

A Dryer That Tumbles Cold: What to Check, in Order

Start at the breaker panel, because it is free and it is common. An electric dryer runs its motor, light and controls from one 120-volt leg and its heating element from both legs of a 240-volt supply, so losing one leg leaves a machine that tumbles, lights up and never warms. Switch the dryer's double breaker fully off and fully on again — a half-tripped double breaker often looks perfectly normal, which is why it must be switched rather than inspected. If that does not fix it, LG's code for no current reaching the heater is nP, and the shortlist behind it is the thermal cutoff, the thermostats and the element itself. A cutoff that has opened is not simply a part to replace: it opens because the machine overheated, and the reason is nearly always a restricted duct, so fitting a new one without clearing the duct means doing the job again in months. On a gas dryer the same symptom is usually the igniter rather than the valve.

Book a diagnostic (305) 419-0291

The full guide

Common Problems By Appliance Content Team Last checked 3 minute read

How to fix LG dryer not heating: the free check first

Go to the breaker panel before you do anything else.

An electric dryer is fed by two 120-volt legs. The motor, the drum light and the control board run from one of them. The heating element needs both. So when one leg goes away — a half-tripped double breaker, a loose connection at the outlet, a worn cord — everything visible keeps working perfectly and the machine simply never gets hot.

It is the most convincing failure in the laundry room and one of the cheapest to resolve. Find the dryer's breaker, which is a double with two switches joined, and switch it fully off and then fully on. Do not inspect it: a half-tripped double breaker frequently looks completely normal from the front, which is exactly why this has to be done rather than looked at.

If the machine heats afterwards, that was the entire problem.

What the machine calls it

LG publishes nP for no current arriving at the heater, which is an honest description of the symptom rather than a diagnosis of the cause. Behind it are three parts and one habit.

The cutoff is a message, not a part

If the thermal cutoff has opened, replacing it is only half the repair.

A cutoff is a safety device. It opens when the machine has run hotter than it was designed to, and it does not reset — it is a one-way part on purpose. So a cutoff that has blown is telling you something got too hot, and on a vented dryer the reason is nearly always restricted air.

Why the fuse opened, read backwards A thermal fuse is a one-time safety device with a link that opens permanently at a set temperature and never closes again. It is not a thermostat, which cycles thousands of times over the life of the machine. So a blown fuse translates as: the inside of the dryer got hotter than the manufacturer allowed, and the last line of protection did its job. Heat cannot get out because the exhaust is restricted, and the exhaust is restricted because the duct is blocked. Three devices act in order — the cycling thermostat holds the drum in a normal band, the high limit thermostat cuts the heat circuit when the climb passes it, and the thermal fuse opens permanently and takes the machine out of service. If the fuse opened, the two in front of it did not stop the climb. Fitting a new fuse and leaving the duct alone puts the warning light out and changes nothing. THE FUSE IS THE MESSENGER. READ THE CHAIN BACKWARDS. THE FUSE OPENED once, and for good HEAT COULD NOT LEAVE the air stalled inside THE DUCT IS BLOCKED this is the repair THREE DEVICES, IN THE ORDER THEY ACT 1 Cycling thermostat Holds the drum in a band. 2 High limit Cuts the heat circuit. 3 Thermal fuse Opens for good. Machine dead. A new fuse on a blocked duct puts the warning light out The two devices in front of it did not stop the climb, so clear the whole run first — and test both thermostats at the same time. A second or third fuse is the machine repeating itself.
On many of these the fuse sits in the motor circuit, so the dryer goes silent rather than cold — which is why "completely dead" and "keeps blowing fuses" are so often the same phone call.

Fitting a new cutoff and leaving the duct packed means doing the same job again in a few months, with a hotter machine in between. Any repair here that does not include clearing the duct is not finished.

Then the element

An electric dryer's element is a coil of resistance wire inside a metal can at the back of the cabinet. It fails open, which is measurable, and it is a straightforward part on a make with LG's parts availability — a stocked item rather than an order.

The thermostats sit alongside it and fail in the same way, which is why the sensible repair replaces the set rather than one at a time. Piecemeal is a second visit.

On a gas dryer it is nearly always the igniter

Gas machines produce the same symptom by a completely different route, and the part that ages is the igniter.

The safety valve on a gas dryer is opened by the current the igniter draws, not by a separate control. So an igniter that has weakened over years will still glow — brightly enough to look perfectly healthy — and still never open the valve. "It glows so it must be fine" is the most common wrong conclusion in this repair, and it is why the igniter is measured rather than looked at.

Watch a full ignition attempt through the lower vent: bright orange glow, then flame within about a minute. A glow that fades with no flame is the diagnosis.

What this page is not about

If your dryer gets warm and simply takes forever, or stops after a few minutes with a hot cabinet, that is airflow rather than heat, and it has its own page. The distinction is worth holding onto:

  • Tumbles completely cold — supply, cutoff, element, or on gas the igniter. This page.
  • Warm but slow, or hot and stopping — the duct, the lint screen, the wall hood. The other one.

LG helps with the second in a way most makes do not: it measures the restriction in its own exhaust and prints a number on the display. If you have ever seen d80, d90 or d95, the machine has already told you which page you are on.

The order, then

  1. Reset the double breaker fully off and on.
  2. Clean the lint screen and check the duct anyway — a cutoff that opened did so for a reason.
  3. Feel the exhaust at the wall hood outside after ten minutes of a heated cycle.
  4. On gas, watch the igniter for a full minute.
  5. If it is still cold, book it, and mention whether it is gas or electric — they are different parts and different visits.

If it turns out to be a repair

Every job on this site is priced the same way: an on-site diagnostic first, the figure agreed in writing before anybody starts.

  • Dryer not heating

    A dryer that turns but never warms is one of the clearest symptoms in this trade, because the motor and the heat run on different things. On an electric machine the drum turns on 120 volts and the element needs the full 240, so half a tripped double breaker gives you exactly this — a machine that looks completely alive and heats nothing.

    • Half a double breaker is the first thing to rule out and it costs nothing
    • nP is LG's code for no current reaching the heater
    • A thermal cutoff that has opened means the duct was blocked, and both need fixing
    What it usually means

  • Dryer error code nP

    LG dryer error code nP: This is the honest version of the commonest dryer complaint — it runs and everything comes out cold. Every spelling LG publishes for it, which machines can raise it, and what to do next.

    What this one means

  • Dryer heating element replacement

    A dryer that tumbles cold. The element is a coil in a metal can at the back of the cabinet, and it is replaced together with the thermal cutoff and the thermostats — because a cutoff that has opened did so for a reason, and the reason is nearly always restricted air.

    • nP is LG's code for no current reaching the heater
    • The double breaker is checked first, and it is free
    • The cutoff and the duct are part of the same repair
    What this involves

Questions people ask about this

It was working yesterday.

That fits the breaker or a supply connection much better than an element, which usually gives some warning. Reset the double breaker fully. If it heats afterwards, look at what else is on that circuit and whether the breaker itself feels warm — a breaker that trips repeatedly is telling you something worth listening to.

Is it worth repairing an older dryer?

Usually yes, and more often than people expect. An element, an igniter or a thermal cutoff is an inexpensive part and the rest of a dryer is very simple machinery. We will say plainly when the number stops making sense against a new machine, and that conversation belongs before the work rather than after it.

My dryer is gas. Does any of this apply?

The breaker check does, because a gas dryer still runs its motor and controls on electricity. After that the paths diverge: on gas the usual part is the igniter, which weakens over years until it no longer draws enough current to open the valve — and it will still glow while doing that, which is why it is measured rather than judged by eye.

What if it is a heat pump dryer?

Then there is no element at all. The heat comes from a refrigerant loop, so a ventless machine that runs and never warms is a sealed-system diagnosis rather than a heater one. Check the water container and the condenser first, because a full container stops the machine by design and it is the most neglected part on these.

Common Problems

  • A shallow black drain pan slid out from underneath the base of a refrigerator that stands pulled forward on a tile floor, a little dirty water still lying in it.

    Water Under the Crisper Drawer, and the Tube Behind It

    A refrigerator handles two entirely separate kinds of water, and where the puddle is decides which one you have before anybody is called.

    Read more
  • A short drain tube pulled out beside a washing machine's pump filter with its cap off, running into a shallow tray on the floor, towels laid around it.

    A Washer Stopped Full of Water: The Filter Nobody Opens

    There is a filter behind a small door at the bottom of your washer, it is designed to be opened by you, and what comes out of it is usually the whole explanation.

    Read more
  • A glass jug held under a refrigerator's water dispenser and filling steadily, the dispenser recess lit, the rest of the kitchen dark.

    No Ice, But the Water Dispenser Works: What That Narrows It To

    One ten-second test splits this problem in half, because ice and water share a supply and part company inside the door.

    Read more

Tell us the model number and what it is doing.

Schedule a visit Call (305) 419-0291

This article is based on:

  • Official manufacturer documentation
  • Internal repair procedures
  • Technician repair history
  • Company quality standards
Call (305) 419-0291