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Bryant 478 Thermistor
A thermistor is a specific kind of resistor that has a varied resistance that is contingent on the heat. The system control board takes the temperature in certain areas to do its job as it should. They inform the HVAC system when a certain temperature reaches a certain point.
Clues the Bryant thermister needs a replacement ASAP
- The main blower may refuse in the attempt to get up to full speed
- The entire system may not function because of any thermistor that is stuck open
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If you are going to be buying or purchasing a new Bryant 478 replacement part, do your due diligence and cross-check the correct model and also make a visual inspection so that you are positive that the proper replacement thermistor is being ordered. There is no rule that says you have to install the part by yourself. Hire someone with experience locally to do it for you.
Feel free to download your manual for help.
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