NHTSA Recall 81V157000
NHTSA Campaign Id 81V157000; Date: Dec. 29, 1981
Recalled Vehicles:
1979 Mack Ms200p; 1980 Mack Ms200p; 1981 Mack Ms200p; 1979 Mack Ms300p; 1980 Mack Ms300p; 1981 Mack Ms300p
Component: Visibility:defroster/defogger System:windshield:blower
Manufactured by: Mack Trucks, Incorporated
Affected Units:: 4,920
Recall Summary:
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.
How to Fix:
A speed variation resistance unit and an electric motor moisture protection cap will be installed without charge.
Recall 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.
Date Owners notified by Manufacturer: Aug 12, 1982
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