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International Comfort Products PA9536AKA1 Thermistor
In an HVAC system, a thermistor is a certain type of resistor whose rated resistance is dependent on the temperature at its location. They can tell the main board when a certain temperature in increasing or decreasing. The system control board must know the temp in order to do its job correctly.
What are the signs that the thermister is almost going bad?
- The blower may refuse in the attempt to get up to full speed
- The system could possibly not even begin because of any stuck thermistor
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