Recall campaign · NHTSA 81V157000

Visibility: defroster/defogger/hvac system: fan/motor

MACK TRUCKS, INCORPORATED filed this campaign with NHTSA on 1981-12-29.

Recall campaignNHTSA 81V157000

Visibility: defroster/defogger/hvac system: fan/motor

Component
Visibility: defroster/defogger/hvac system: fan/motor
Manufacturer
MACK TRUCKS, INCORPORATED
Vehicles affected
4,920
Reported to NHTSA
1981-12-29
Owners notified
1982-08-12

Defect description

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.

Manufacturer remedy

A SPEED VARIATION RESISTANCE UNIT AND AN ELECTRIC MOTOR MOISTURE PROTECTION CAP WILL BE INSTALLED WITHOUT CHARGE.

Notes

VEHICLE DESCRIPTION: TRUCKS.SYSTEM: HEATING; CAB HEATER MOTOR, ELECTRICAL SWITCH.CONSEQUENCES OF DEFECT: IF THE VEHICLE IS STANDING STILL (PARKED OR STOPPED INTRAFFIC) HEAT GENERATED BY THE OVERLOAD MAY MELT AND IGNITE THE SURROUNDINGPLASTIC HOUSING AND WIRE COVERING. A FIRE COULD SPREAD QUICKLY THROUGHOUT THECAB, CAUSING SERIOUS INJURY TO VEHICLE OCCUPANTS.NOTE: OWNER IS ADVISED TO MAKE SURE HEATER/DEFROSTER FAN MOTOR IS FUNCTIONALBEFORE USING CAB HEATER PRIOR TO REPAIR. HEATER/DEFROSTER BLOWER SHOULD NOT BEUSED IN "LOW" OR "MEDIUM" SPEEDS WHILE THE VEHICLE IS STOPPED OR ENGINE ISIDLING.

Scope of coverage

6 model years across 2 models.

ModelYears on record
MACK MS200P1981 1980 1979
MACK MS300P1981 1980 1979

Safety recall repairs are provided free of charge by franchised dealers, regardless of vehicle age or mileage. This page displays aggregated data for the model year. To check recall status for a specific vehicle, search its VIN at nhtsa.gov.