Commercial Washer or Dryer Temperature Sensor / Thermistor Board Failure – Overheating or Running Cold | UpFix

When Temperature Control Fails, So Does Wash Quality

Your customers expect clean, dry clothes—not cold washes or overheated dryers that melt garments.
When temperature control fails, complaints start stacking up, cycles take longer, and machines run inefficiently. The problem often isn’t the heater or thermostat—it’s the temperature sensor or thermistor control board.

This small circuit constantly monitors and regulates the temperature of water and air in the machine. When it malfunctions, you lose precision—and profit.

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Common Symptoms

• Dryer overheats and shuts down

• Washer runs cold no matter the setting

• Inconsistent drying times between cycles

• Temperature error or “Sensor Fault” displayed

• Machine takes longer than usual to complete cycle

• Visible scorch marks or burnt odor from control area

These issues appear across Speed Queen, Dexter, Huebsch, Maytag, Unimac, Continental Girbau, and Electrolux equipment.

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Typical Fault Codes and Their Meaning

If the heater element tests good but temperatures swing wildly, the board that processes the thermistor signal is the true cause.

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Why Temperature Control Boards Fail

1. High heat cycles degrade capacitors and voltage regulators.

2. Humidity and detergent vapors corrode connectors.

3. Sensor wiring faults backfeed voltage into the board.

4. Aging components cause erratic readings or false shutdowns.

5. Thermal stress warps solder joints on larger relays.

Operators often describe: “Dryer overheats for 10 minutes, then just blows cold air.” That’s a typical sign of a bad thermistor circuit or burnt power driver on the board.

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Why Repair Makes Sense

Replacement boards can cost $500–$1,000, and some discontinued units are impossible to source. Waiting on OEM replacements means idle machines and lost cycles.

UpFix repairs your existing temperature or thermistor board quickly and precisely. You keep your original programming, wiring, and configuration—no setup required.

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How UpFix Repairs Temperature Sensor & Thermistor Boards

1. Diagnostic testing for voltage stability and sensor input accuracy.

2. Replacement of failed comparators, regulators, and relay drivers.

3. Reflow and reinforcement of heat-damaged solder joints.

4. Cleaning and resealing for humidity protection.

5. Thermal simulation testing through multiple heating cycles.

Each repaired unit is tested under simulated washer and dryer conditions to ensure consistent, accurate temperature regulation.

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Real-World Example

A large coin laundry in Florida reported several dryers overheating and shutting down mid-cycle. UpFix identified burnt relay contacts and a faulty thermistor circuit on the control board. After full repair, reflow, and testing, all boards were back in service within 48 hours—saving the owner over $2,500 in replacement costs and eliminating customer complaints.

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Supported Brands

• Speed Queen / Huebsch / Dexter

• Maytag / Unimac / Continental Girbau

• Electrolux / ADC

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Why Operators Choose UpFix

• Save up to 80% vs replacement

• 24–48-hour turnaround on most temperature boards

• Plug-and-play reinstall—no reprogramming required

• Eco-friendly repair extends part life and reduces waste

• Trusted nationwide for reliability and fast results

Precision temperature control means predictable results, satisfied customers, and lower energy costs. UpFix helps you achieve all three.

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Precision Temperature Means Consistent Profits

Your machines should deliver perfect cycles—every time.
Send your part to UpFix for professional thermistor and temperature control board repair.
We’ll restore consistent heat control, save you up to 80%, and keep your business running smoothly—and profitably.