How to Use the Defrost Button in Your Refrigerator

Quick Answer

To use the defrost button, press it firmly until you hear the compressor click off, which initiates the melting process. On most manual-defrost models, this button is located right in the center of the temperature control thermostat dial.

Regularly clearing ice from your cooling coils keeps your compressor from burning out early. When frost builds up it acts like an insulator and forces the fridge to run non-stop just to stay cold. I've seen homeowners ignore this for months until the compressor finally gives up entirely. A ten-second button press and a couple hours of patience can honestly save you hundreds in energy costs and prevent a complete cooling failure down the road.

GenericRefrigeratorSeverity: lowDifficulty:

Time to Fix

60–240 min

Difficulty

Parts Cost

$0 (no parts needed)

Tools Needed

Several old thick towels for soaking up meltwater, Microfiber cloth for drying interior walls

How to Use the Defrost Button in Your Refrigerator

OK so here's the deal: if you see ice building up on the back wall or the cooling plate thicker than a quarter inch, it's time to hit that button. You don't need any special tools, just a few old towels to catch the meltwater. The whole process takes one to four hours depending on how bad the buildup is and how warm your kitchen runs. Pretty simple maintenance that most people skip way too long.

Common Causes

The door seal has a small gap or crack that's letting warm humid air sneak in every time you close the door, and that moisture hits the cold coils and freezes almost instantly.
You've been opening the fridge a lot during humid summer days, and all that warm air loaded up the coils with way more moisture than they can handle between natural defrost intervals.
The fridge has just been running long enough that normal frost accumulation hit the quarter-inch threshold, which happens every two to six weeks depending on your climate and how often the door opens.
Someone left the door slightly ajar overnight. Even just a crack is enough to dump so much warm air inside that every coil gets coated in a thick frost layer by morning.
The defrost drain at the bottom of the evaporator pan got clogged with crumbs or debris, so meltwater from previous partial defrosts refroze on the coils and built up faster than usual.

Symptoms You May Notice

There's a solid white sheet of frost covering the back wall of your fridge, thick enough that you can actually feel it cutting into the interior space.
The compressor is running constantly. You can hear it humming non-stop but things still aren't as cold as they should be.
Items sitting right up against the back wall are freezing solid even on a low temperature setting.
The door feels like it's getting harder to close, and you can see ice crystals forming around the inside edges of the door gasket.
Water is pooling at the bottom of the fridge compartment, which usually means ice built up enough that it started melting on its own and overwhelmed the drain.

Can you reset a Generic refrigerator to clear the HOW-TO-DEFROST code?

After the ice is fully melted and the interior is dry, check if the button popped back out on its own. If it hasn't, pull it out gently. Turn the temperature dial to your normal setting, usually 3 or 4 on a 1-7 scale. The compressor should kick on within two to three minutes. If it doesn't, turn the dial to off, wait five minutes, then turn it back.

Tools Required for Diagnosis

Several old thick towels for soaking up meltwaterMicrofiber cloth for drying interior wallsBowl of hot water (optional, speeds up melting)Mild dish soap mixed with warm water for cleaning gasketsFlashlight for checking behind the evaporator plate

Diagnostic Checklist

Follow these steps in order. We start with the easiest external fixes before opening up the machine.

Frequently Asked Questions

Why does my fridge have a defrost button but my neighbor's doesn't?

Most modern full-sized fridges use an automatic defrost timer and a small heating element that handle this every 6 to 12 hours without you ever knowing it happened. Defrost buttons show up on manual-defrost models, mini-fridges, compact units, and older cycle-defrost fridges from the 70s and 80s. If your fridge came from a garage sale or got handed down, there's a solid chance it's a manual-defrost unit. Not a bad thing actually, these tend to be more reliable long-term since there's just less automatic stuff to break down.

How often should I use the defrost button?

Watch the coils and use it when the frost looks thicker than a pencil, roughly a quarter inch. That usually works out to every two to six weeks. If you're in a humid climate or opening the door a ton, maybe bump it up to every two weeks. I had a customer in south Florida who was doing it every ten days in the summer because her fridge was in the garage. Your climate matters way more than any fixed schedule someone gives you.

Will my food spoil while I use the defrost button?

Keep the door closed and most things will be fine for a standard two-hour cycle. The interior stays cold enough to keep food safe as long as you're not opening it every few minutes to check on the ice. That said, if you've got raw meat, fresh fish, or anything you're worried about, just toss it in a cooler with some ice while the cycle runs. Honestly not worth risking a $15 pack of chicken over a two-hour defrost.

What if the defrost button won't stay pushed in?

Two things could be going on. One: the thermostat thinks the evaporator is already warm enough, so it's mechanically blocking the button from latching. Sometimes happens on a warm day if the fridge hasn't been working hard. Two: there's clearly ice on the coils but the button still won't catch, which means the mechanical linkage inside the thermostat is worn out. In that case the whole cold control assembly needs to come out. Usually a $20 to $50 part depending on the model, and pretty straightforward to swap yourself.

Does the defrost button turn itself off?

Yeah, usually. These buttons are spring-loaded and held by a small metal catch inside the thermostat housing that reacts to temperature. Once the coils warm up enough, the catch releases and the button pops back out on its own. Typical release temp is around 40 to 50 degrees Fahrenheit at the evaporator. If your button never pops back out and the fridge stays stuck in defrost mode, the thermostat's stuck and needs replacing before your compressor burns itself out trying to cool against a dead system.

Can I speed up the defrost process?

A bowl of hot water inside the cabinet helps a lot, just swap it out when it cools down. Leaving the door cracked open speeds things up too if you don't mind your kitchen warming up a bit. What you absolutely don't want to do is use a hair dryer, heat gun, or any sharp tool to chip at the ice. I've seen heat guns warp the plastic liner badly enough that the door won't seal right anymore. And chipping ice with a screwdriver punctures refrigerant lines way more often than you'd think.

Models Known to Experience HOW-TO-DEFROST Errors

This repair applies to most Generic refrigerators with this error code. Common model numbers include:

Frigidaire FFPE9L2QM, Danby DAR026A1BDD, Magic Chef MCBR360W2, Midea WHS-65LB1, Black+Decker BCRK17B, Haier ESNCM032BS, RCA RFR741, Avanti RA7316PST

Written by

Mike Sullivan

Lead Appliance Repair Technician · 20 years experience

Last verified for technical accuracy on March 17, 2026