Skip to Main Content
Canadian
Canadian owned and operated

252449 - Miller 252449 NTC Thermistor Temperature Sensor 30K Ohm

Packaging: 1 per ea
$102.08/ea $71.64/1 per ea only $71.64/eaSave 30%

Usually ships within 3-5 business days

OVERVIEW

Restore Your Welder's Thermal Protection

Keep your Miller welding machine running reliably with the Miller 252449 Thermistor NTC 30K Ohm. This authentic replacement part is essential for the thermal management system of compatible Miller power sources. The thermistor acts as the machine's nervous system regarding heat, constantly feeding resistance values back to the processor that correlate to the internal temperature of power components. When a machine reports thermal errors or fan operation issues, a faulty thermistor is often the culprit.

Designed for easy integration, this sensor features an 8-inch lead and is rated for 30,000 Ohms at 25°C. It is engineered to withstand the electrical noise and environmental conditions found inside a working welding machine. Replacing a damaged or drifting thermistor restores the machine's ability to regulate its own temperature, ensuring that duty cycles are respected and internal components are not subjected to heat stress that could shorten their lifespan.

Don't risk your valuable equipment with generic electronic components. The Miller 252449 is built to the exact form and function required for your specific model. Please verify fitment with your machine's serial number or parts manual before ordering to ensure this is the correct sensor for your unit. Trust Welders Supply for high-quality, genuine Miller repair parts to keep your shop productive.

Additional Information
Brand:Miller
Packaging Description:1-per-ea
Component Type:NTC Thermistor, Temperature Sensor
Resistance:30K Ohm @ 25 Deg C
Lead Length:8.00 Inches
Part Number:252449

INCLUDED

  • 1 x Miller 252449 Thermistor NTC 30K Ohm (8-inch lead)

APPLICATIONS

  • Thermal monitoring in Miller welding power sources
  • Replacement of faulty temperature sensors
  • Repairing 'Overheat' or thermal error codes
  • Preventative maintenance for industrial welders

FAQ

The Miller 252449 Thermistor monitors the internal temperature of specific components within the welding machine. It sends a signal to the control board to manage cooling fans and trigger thermal shutdown if the machine gets too hot.

Common signs include the machine displaying thermal overload errors when cold, fans running constantly when not needed, or the machine failing to shut down when it actually overheats. Diagnostic testing with a multimeter can confirm if the resistance is out of spec.

This is an NTC thermistor rated at 30K Ohm at 25 degrees Celsius.

No, it is specific to certain models. You should always check your machine's parts manual or verify with the serial number to ensure this part (SKU 252449) is the correct one for your unit.

The lead on the Miller 252449 thermistor is 8.00 inches long.

It is highly recommended to use the genuine Miller part. Generic sensors may have different Beta values (curves), meaning even if they read 30K at 25°C, they might report incorrect temperatures at operating heat, risking machine damage.

Thermistors are typically mounted directly onto heat sinks or specific power components (like IGBTs or diodes) inside the machine case.
Google Rating
4.9
Based on35reviews
×
js_loader