Key Takeaway
Truck Cabin Heater May Catch Fire by MACK TRUCKS, INC was recalled on January 24, 2023. What to do: Dealers will update the software for the Hybrid Powertrain Control Unit and Instrument Cluster, and install replacement relays, free of charge. Owner...
Truck Cabin Heater May Catch Fire
Description
Mack Trucks, Inc. (Mack) is recalling certain 2019 and 2021-2023 LRBE battery electric trucks. The cabin heater relay may fail, causing the coolant heater to overheat.
Injuries / Consequence
A coolant heater that overheats can increase the risk of fire.
Remedy
Dealers will update the software for the Hybrid Powertrain Control Unit and Instrument Cluster, and install replacement relays, free of charge. Owner notification letters were mailed March 16, 2023. Owners may contact Mack customer service at 1-800-866-1177. Mack's number for this recall is SC0440.
Products Affected
Vehicle
VehiclesRelated Recalls
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December 15, 2025
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November 20, 2025
Load Lock Clamps May Fail
November 20, 2025
ECU Malfunction May Impair Safety Systems
November 18, 2025
Headlights May Fail
November 3, 2025
Improperly Welded Seat Belt Anchor/FMVSS 210
October 6, 2025
Frequently Asked Questions
Is this recall still active?
Check the status badge at the top of this page. "Ongoing" means the recall is still active and you should follow the remedy instructions. "Completed" or "Terminated" means the recall process has concluded, though the safety issue remains relevant for any unrepaired products.
How do I check if my product is affected?
Compare the model number, lot code, serial number, or date range listed in the recall notice with the information on your product's label or packaging. For vehicles, check your VIN at NHTSA.gov/Recalls.
What remedy is available for this recall?
The listed remedy for this recall is: Dealers will update the software for the Hybrid Powertrain Control Unit and Instrument Cluster, and install replacement relays, free of charge. Owner notification letters were mailed March 16, 2023....
Where can I find the original recall notice?
This recall was issued by NHTSA. You can view the original notice using the link provided above.