The defect
WHEN THE IGNITION KEY IS IN THE "ON" POSITION AND THE HEATER IS OPERATING AT THE "LOW" OR "MEDIUM" SETTING, THE HEATER SWITCH WIRING WILL OVERLOAD IN THE EVENT THE HEATER MOTOR SEIZES.
The remedy
A SPEED VARIATION RESISTANCE UNIT AND AN ELECTRIC MOTOR MOISTURE PROTECTION CAP WILL BE INSTALLED WITHOUT CHARGE.
NHTSA's own wording · initiated by MFR
Vehicles covered
| Model | Model years |
|---|---|
| Mack MS200P | 1981 |
| Mack MS300P | 1981 |
Components: VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:FAN/MOTOR
Model years in this recall
NHTSA complaints and the number of recall campaigns for each model year this recall covers.
| Model | Year | Complaints | Recalls |
|---|---|---|---|
| Mack MS200P | 1981 | 0 | 2 |
| Mack MS300P | 1981 | 0 | 3 |
Other visibility recalls in 1981
5 of the 157 recall campaigns reported to NHTSA in 1981 concerned the visibility; MACK TRUCKS, INCORPORATED filed 245 campaigns in all.
| 81V059000 19 May 1981 | MALAGUTI OF AMERICA, INC. |
| 81V054000 20 Apr 1981 | PACCAR, INCORPORATED |
| 81V027000 26 Feb 1981 | IVECO TRUCK OF N.A., INC. |
| 81V022000 11 Feb 1981 | GENERAL MOTORS CORP. |
NHTSA recalls (public domain) · all recalls of 1981