Uploaded February 2026 | Updated September 2026, 2 weeks ago
Learn everything about HVAC thermistor training including proper testing methods, common failures, and splicing techniques in this comprehensive guide. This HVAC thermistor training covers NTC (Negative Temperature Coefficient) sensors used in refrigeration and HVAC systems.
What You'll Learn:
HVAC thermistor testing methods using resistance measurements
Common thermistor failures: moisture infiltration, overheating, wire rubout, and corrosion
Why thermistors typically fail HIGH in HVAC applications
Understanding 10K, 20K, and 200K thermistor types
The 77°F (25°C) reference point for all thermistors
Proper splicing techniques and connection methods for thermistor replacement
How to identify thermistor types without charts
Applications in walk-in coolers, mini-splits, and temperature control systems
Key Topics Covered:
HVAC thermistor testing with multimeters
Resistance-to-temperature relationships
Common failure modes and diagnostics
Proper wire connections (solder vs crimp vs wire nuts)
Moisture-related failures and prevention
Using resistors as temporary troubleshooting tools
Service applications and real-world scenarios
Perfect for HVAC technicians looking to master thermistor diagnostics and replacement in commercial refrigeration and HVAC systems.
Read all the tech tips, take the quizzes, and find our handy calculators at hvacrschool.com or the HVAC School Mobile App on the Google Play Store (hvacrschool.com/play-store) or App Store (hvacrschool.com/app-store).
Learn everything about HVAC thermistor training including proper testing methods, common failures, and splicing techniques in this comprehensive guide. This HVAC thermistor training covers NTC (Negative Temperature Coefficient) sensors used in refrigeration and HVAC systems.
What You'll Learn:
HVAC thermistor testing methods using resistance measurements
Common thermistor failures: moisture infiltration, overheating, wire rubout, and corrosion
Why thermistors typically fail HIGH in HVAC applications
Understanding 10K, 20K, and 200K thermistor types
The 77°F (25°C) reference point for all thermistors
Proper splicing techniques and connection methods for thermistor replacement
How to identify thermistor types without charts
Applications in walk-in coolers, mini-splits, and temperature control systems
Key Topics Covered:
HVAC thermistor testing with multimeters
Resistance-to-temperature relationships
Common failure modes and diagnostics
Proper wire connections (solder vs crimp vs wire nuts)
Moisture-related failures and prevention
Using resistors as temporary troubleshooting tools
Service applications and real-world scenarios
Perfect for HVAC technicians looking to master thermistor diagnostics and replacement in commercial refrigeration and HVAC systems.
Read all the tech tips, take the quizzes, and find our handy calculators at hvacrschool.com or the HVAC School Mobile App on the Google Play Store (hvacrschool.com/play-store) or App Store (hvacrschool.com/app-store).
