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Carrier 58DR Thermistor
In an HVAC system, a thermistor is a type of resistor whose rated resistance is solely dependent on heat. The system needs to know the temperature in several different areas to be sure everything is going well. They tell the circuit board when the temperature in increasing or decreasing.
Do you know if your main thermister is failing?
- The entire system could possibly never start because of the thermistor that is stuck open
- Blower fan could fail in the attempt to ramp up
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