If your refrigerator hasn’t shut off in days, you’re not imagining it. The compressor kicks on and stays on. The fan hums nonstop. Your electric bill creeps up. And eventually, something gives out. I’ve seen this hundreds of times across Denton, Little Elm, Frisco, and Lewisville. Before you call for help, there are five things you can check yourself in about fifteen minutes. They’ll tell you if it’s a simple fix or if you need a tech.
1. Frisco Area? Check the Condenser Coils
Pull the fridge away from the wall. Unplug it first. The condenser coils are the black or silver grid of tubes on the back or behind a grille at the bottom. If they’re caked with dust, pet hair, or lint, that’s your problem. The compressor has to run longer to reject heat through dirty coils. Clean them with a vacuum brush or a coil cleaning brush. Do not use water. Do not bend the fins.
What this tells you: If the coils are dirty, the fridge is working overtime to stay cold. Cleaning them usually drops the run time by half. If they’re clean and the fridge still runs nonstop, move to the next check.
2. Denton Area? Listen to the Condenser Fan
With the fridge still unplugged, spin the condenser fan blade by hand. It should spin freely. If it’s stiff or makes a grinding noise, the fan motor bearings are shot. Plug the fridge back in and listen. You should hear the fan kick on within a minute of the compressor starting. If the fan doesn’t run, the compressor overheats and runs continuously trying to keep up.
What this tells you: A bad condenser fan motor is a common failure. It’s a $40–$80 part and takes about 30 minutes to replace if you’re handy. But if you let it run with a seized fan, the compressor can overheat and fail. That’s a $400–$600 repair. Stop at the fan check.
3. Little Elm Area? Test the Thermostat or Temperature Sensor
Locate the thermostat control inside the fresh food section. It’s usually a dial or a digital panel. Turn it to its coldest setting, then back to mid-range. You should hear the compressor cycle off and on within 5–10 minutes. If it doesn’t cycle, the thermostat or the temperature sensor (on newer models) has failed. On a Samsung or LG, this is often a thermistor that’s gone out of spec.
What this tells you: A stuck thermostat tells the compressor to run full blast all the time. If you can’t get the fridge to cycle, the part is bad. Replacing a thermostat is simple on older models—two wires and a clip. On modern digital fridges, the thermistor is a cheap part but requires a multimeter to test. If you don’t own a meter or aren’t comfortable testing live circuits, this is where you stop.
4. Lewisville Area? Inspect the Door Seal
Open the door and run your hand along the rubber gasket. Feel for cold air escaping. Close the door on a dollar bill—if you can pull it out with no resistance, the seal is shot. A torn or loose gasket lets cold air leak out, so the fridge runs nonstop trying to keep up. Check for cracks, mold, or gaps, especially at the bottom corners.
What this tells you: A bad door seal is a cheap fix. A new gasket runs $20–$60 and snaps on in about 20 minutes. But if you ignore it, the compressor runs 24/7 and burns out. If the gasket looks fine, move on.
5. Check the Ice Maker (If You Have One)
Open the freezer. Look at the ice maker. Is the arm stuck in the up position? Is the ice bin jammed with a block of ice? A stuck ice maker can tell the control board to keep the freezer cold nonstop, which drags the whole fridge into constant run mode. Unplug the fridge, pull the ice bin, and check for ice bridges blocking the ejector blades. Clear any jams with warm water—never use a knife.
What this tells you: If the ice maker is stuck, freeing it up often stops the constant run. If the ice maker motor is dead, you can replace it for about $50–$100. If it’s not the ice maker, you’re into sealed system territory.
When to Stop DIY and Call a Tech
If you’ve cleaned the coils, confirmed the fan spins, tested the thermostat, checked the door seal, and freed the ice maker, but the fridge still runs constantly, you’re looking at a sealed system problem. That means a refrigerant leak, a bad compressor, or a clogged capillary tube. These are not DIY repairs. You need a licensed technician with recovery equipment and a vacuum pump.
Cost of mistake: Trying to braze a refrigerant line yourself can release harmful gas, void your warranty, and cost you $800 for a compressor replacement that a pro could have fixed for $300 if caught early.
Cost Comparison: DIY vs. Professional Repair
| Repair Type | DIY Cost (parts only) | Professional Repair Cost | Notes | |————-|———————–|————————–|——-| | Condenser fan motor replacement | $40–$80 | $150–$250 | DIY takes 30 min if you’re handy | | Compressor replacement | Not recommended | $400–$800 | Requires vacuum pump and recovery machine | | Door seal replacement | $20–$60 | $100–$200 | DIY is straightforward with a screwdriver | | Ice maker motor replacement | $50–$100 | $150–$300 | DIY requires basic wiring knowledge |
What Our Customers Say
“My LG fridge was running nonstop for three days. I checked the coils and the fan like this article says, but it still wouldn’t cycle. Called S&W. Turned out to be a refrigerant leak—they fixed it in two hours for $300. Would’ve cost me $800 if I’d let it run another week.” — Mark T., Frisco, TX
FAQ
Q: Why is my refrigerator running but not cooling? A: That usually points to a sealed system issue—low refrigerant or a bad compressor. Check the condenser coils and fan first, but if those are fine, call a tech.
Q: How often should I clean my condenser coils? A: Every six months if you have pets, once a year otherwise. Dirty coils are the number one cause of constant run time.
Q: Can a bad ice maker cause the fridge to run constantly? A: Yes. A stuck ice maker arm or jammed ice bin can trick the control board into keeping the freezer cold nonstop, which makes the whole fridge run longer.
Q: How much does a compressor replacement cost? A: Typically $400–$800 depending on the brand and labor. It’s not a DIY job—you need EPA certification to handle refrigerant.
Q: Does S&W Service & Repair work on all brands? A: We handle Whirlpool, Maytag, GE, LG, Samsung, KitchenAid, Frigidaire, Bosch, Kenmore, Sub-Zero, Wolf, and Viking. We also take Old Republic Home Protection warranty work orders, so if you’ve got ORHP coverage, that’s one less thing to worry about.
The Bottom Line
A fridge that runs nonstop usually comes down to dirty coils, a bad fan, a stuck thermostat, a leaking door seal, or a jammed ice maker. You can check all five in under 20 minutes with no tools except a vacuum, your ears, and a dollar bill. If that doesn’t fix it, don’t keep running it. Every hour it runs nonstop wears out the compressor. Call a pro before you turn a $200 repair into a $600 one.
Call S&W Service & Repair LLC at 940-286-4094 or book online to get your fridge back on a normal cycle. For a fridge-specific diagnosis, visit our refrigerator repair service page.