Having trouble getting hot air out of your 1970, 1971, 1972 Chevelle's heater system on anything other than a high speed? The problem is most likely your blower motor resistor! This little fiberglass board uses a series of progressive resistors to regulate the motor's speed throughout the switch range. The highest speed of the heater blower motor is not controlled by the resistor. Because of this, when the resistor fails, the fan will often work on the highest speed setting and not any lower speed. You shouldn?t have to settle for getting just one speed.
| Make | Model | Years |
| Chevrolet | Chevelle | 1970 - 1972 |
| Chevrolet | Estate | 1970 |
