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International Comfort Products H2A324GKA100 Thermistor
In an HVAC system, a thermistor is a type of resistor whose rated resistance varies depending on the temperature. The furnace or AC reads the temperature in several different areas to make a decision on what needs to be done. They convey to the system control board when the temperature in increasing or decreasing.
Some warnings of a poorly working all-important thermister
- The heating and cooling system could never start up due to a stuck thermistor
- Blower motor may fail in the attempt to ramp up the airflow
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