--- title: Commercial Washer or Dryer Temperature Sensor / Thermistor Board Failure – Overheating or Running Cold | UpFix description: Dryer not heating properly or washer runs cold? UpFix repairs commercial laundry temperature sensor and thermistor control boards fast—saving you up to 80% and keeping your business profitable. --- [Skip to content](https://info.upfix.com/kb/commercial-washer-or-dryer-temperature-sensor-/-thermistor-board-failure-overheating-or-running-cold-upfix#main-content) English Show submenu for translations ![logo (2)](https://info.upfix.com/hs-fs/hubfs/logo%20(2).png?width=189&height=56&name=logo%20(2).png) Open main navigation Close main navigation - English Show submenu for translations - Website Website Hello. How can we help you? - There are no suggestions because the search field is empty. 1. [UpFix FAQ's](https://info.upfix.com/kb?hsLang=en) 2. [Commercial Laundry](https://info.upfix.com/kb/commercial-laundry?hsLang=en) # 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. --- ### **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. --- ### **Typical Fault Codes and Their Meaning** | Code | Description | Likely Cause | | --- | --- | --- | | **E5 / E6** | Overheat fault | Burnt thermistor or failed comparator IC | | **HE / HE1** | Heat control fault | Blown voltage regulator or driver transistor | | **tE / E31** | Temperature sensor error | Open or shorted input circuit | | **E64 / E67** | Element relay fault | Power driver failure on board | If the heater element tests good but temperatures swing wildly, the board that processes the thermistor signal is the true cause. --- ### **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. --- ### **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. --- ### **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. --- ### **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. --- ### **Supported Brands** - Speed Queen / Huebsch / Dexter - Maytag / Unimac / Continental Girbau - Electrolux / ADC --- ### **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. --- ### **Precision Temperature Means Consistent Profits** Your machines should deliver perfect cycles—every time. **[Send your part to UpFix](https://www.upfix.com/)** for professional thermistor and temperature control board repair. 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