Mack Trucks cabin heater relay may fail, causing the coolant heater to overheat.
The short version
Mack Trucks, Inc. reported a problem with the wiring switches/knobs/buttons. Here is what owners need to know.
The cabin heater relay may fail, causing the coolant heater to overheat.
A coolant heater that overheats can increase the risk of fire.
Take it to a dealer — they will update the software for the Hybrid Powertrain Control Unit and Instrument Cluster, and install replacement relays, free of charge.
Affected vehicles
These model years are included in NHTSA campaign 23V-024.
| YEAR RANGE | MODEL |
|---|---|
| — | See NHTSA record 23V-024 |
What changed
Newest first. The record shows both when the recall began and what has changed since.
- Recall reported to NHTSA. LATEST
Drive one of these? Check your VIN to see if your specific vehicle is affected.
Check your VINWhat this record means
Data from the NHTSA recall database. A clean VIN check means no open federal recalls for that vehicle — not that it never had one.
Not affiliated
MyAutoRecalls is not affiliated with Mack Trucks, Inc. or the National Highway Traffic Safety Administration.