If your Samsung dryer is flashing the tO error code, you’re likely dealing with a Cool Down Error, a message that might cause frustration—especially when laundry piles up. Fortunately, understanding what this error means, why it occurs, and how to resolve it can help you get your appliance running again in no time.
This blog post will guide you through the causes, troubleshooting steps, professional repair solutions, and when to call in expert technicians from Express Repair to handle the issue.
The tO error code on Samsung dryers refers to a cooling error, typically associated with the thermistor—a small component that monitors temperature inside the dryer. When the thermistor fails to accurately detect temperature changes or sends abnormal signals to the dryer’s control board, the unit issues the tO code as a warning.
This error can prevent the dryer from starting or completing a cycle, protecting the appliance from overheating or malfunctioning.
There are several possible reasons for this error code:
The most common cause is a malfunctioning or damaged thermistor. If it fails to relay accurate temperature readings, the dryer may not recognize when the drum cools properly after a cycle.
Loose or damaged wiring between the thermistor and the control board can cause communication errors, triggering the tO code.
In rare cases, the main control board itself may be faulty, misinterpreting the thermistor readings or failing to respond appropriately.
Blocked vents or a build-up of lint in the ductwork can prevent proper cooling, leading the dryer to misfire with a tO error even when the thermistor is functional.
Before calling a technician, there are a few basic steps you can take to try and resolve the issue.
Unplug the dryer from the wall outlet for at least 5 minutes to reset the control board. Afterward, plug it back in and run a short cycle to check if the error reappears.
Look for signs of lint buildup in your external vent, lint filter, and ducts. Clean out any obstructions to ensure proper airflow and cooling.
If you’re comfortable using a multimeter:
Disconnect the thermistor from the dryer.
Measure the resistance across the terminals. A healthy thermistor should read approximately 10k ohms at room temperature (77°F/25°C).
If the reading is significantly off, it likely needs replacing.
Note: This step involves electrical testing and should only be done if you have the necessary tools and experience.
Check for any burnt, corroded, or disconnected wires leading to the thermistor or control board. Loose connections can easily trigger the tO code.
While minor issues like vent blockages can be resolved at home, several scenarios warrant a professional diagnosis and dryer repair:
You’re uncomfortable performing electrical tests or disassembling the unit.
Thermistor replacement or control board inspection is required.
The issue persists after DIY troubleshooting.
Your dryer is still under warranty (to avoid voiding coverage).
At Express Repair, our licensed technicians specialize in Samsung dryer repairs and can quickly diagnose and resolve tO errors using genuine parts and advanced tools.
Here are several ways to keep your Samsung dryer running smoothly and avoid cool down errors:
Clean the lint trap after every load.
Inspect and clean your dryer vent at least every 6 months.
Heavy loads can overwork your dryer and cause overheating, leading to potential cooling issues.
A trained technician from Express Repair can catch early signs of wear or malfunction before they cause downtime.
With years of experience and a team of trained appliance specialists, Express Repair offers:
Same-day service in most areas
Certified and licensed technicians
Upfront pricing with no hidden fees
Use of Samsung-approved parts for lasting repairs
Courteous, professional service backed by positive customer reviews
We service customers all over Canada, ensuring that your Samsung dryer is in top condition year-round.
Seeing the Samsung Dryer Error Code tO may seem alarming at first, but it’s a preventive warning that helps protect your appliance. Whether the problem lies with the thermistor, wiring, or control board, addressing it promptly ensures your dryer remains safe and efficient.
If troubleshooting doesn’t solve the problem, don’t stress—just call Express Repair. Our expert technicians will restore your dryer to perfect working condition, fast.
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