RoadVitals

NHTSA safety recall

Recall 81V157000: VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:FAN/MOTOR

MACK TRUCKS, INCORPORATED · Reported to NHTSA Dec 29, 1981

Recalls apply to specific vehicles, not to every vehicle of a model year. Check your VIN with NHTSA or your manufacturer's dealer to confirm whether a recall affects your vehicle.

Check a VIN on NHTSA.gov
Units potentially affectedThe manufacturer's own estimate of how many vehicles or items of equipment may contain the defect. It is not a count of failures, and not every unit in the range is necessarily affected.
4,920
Model years coveredModel years in our database that NHTSA matched to this campaign. Whether an individual vehicle is covered still depends on its VIN.
6
Models covered
2
Grouped from the model years above
Reported to NHTSA
Dec 29, 1981
Production Sep 1, 1979 – Aug 1, 1981

What this recall covers

NHTSA's campaign record, quoted as published

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.

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.

A safety recall is issued when a manufacturer or NHTSA determines that a vehicle has a safety-related defect or does not comply with a federal motor vehicle safety standard. Recall repairs are free. Whether a specific vehicle is covered depends on its VIN — a recall listed for a model year does not necessarily apply to every vehicle of that year.

Campaign details

Identifiers and dates as filed with NHTSA

Manufacturer
MACK TRUCKS, INCORPORATED
Manufacturer's campaign number
Not recorded
NHTSA campaign number
81V157000
Units potentially affected
4,920
Report received
Dec 29, 1981
Production range
Sep 1, 1979 – Aug 1, 1981
Campaign type
Vehicle
Federal safety standard (FMVSS)
Not recorded

Vehicles covered

6 model years across 2 models

Recalls apply to specific vehicles, not to every vehicle of a model year. Check your VIN with NHTSA or your manufacturer's dealer to confirm whether a recall affects your vehicle.