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International Comfort Products PGF042K100F Thermistor
In an HVAC system, a thermistor is a specific kind of resistor whose resistance changes as it depends on current temperature. They tell the circuit board when a temperature reaches a certain point. The heating system takes the temperature in some specific areas of the system to do its job correctly.
Major symptoms of a bad system thermister
- The initial sequence could possibly not operate due to a thermistor that is stuck open
- Blower motor refuses in the attempt to engage full speed spinning
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