Heater blower motor relay, replacement
Mack technical service bulletin FSB 873-019 for 2009-2015 Mack Leu.
- Bulletin number
- FSB 873-019
- Component
- Equipment
- Summary
- Heater blower motor relay, replacement. On some mack leu trucks built between 10/16/2008 and 9/29/2014, continuous use of the heater blower motor can cause failure of the heater blower motor relay and wire terminals. If the blower motor is inoperable, inspect the fuse block, relay, terminals, and wires. If any component show signs of excessive heat (discolored and melted plastic), the relay block assembly must be replaced with part number 22572078.
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