- Summary
- Vehicle description: certain school and transit buses were built with a poor quality heater/defroster blower switch. In some cases this has caused the melting of the heater harness connector at the switch terminals or the high-speed wire insulation at the connector. Also, some of the units had improper circuit protection size installed in the heater defroster circuit.
- Consequence
- If an operator detects smoke or the smell of melting wire insulation from the blower control panel, the operation of the heater/defroster at high speed should be discontinued until the repair is made.
- Remedy
- Owners will be provided with instructions and parts to replace the switch and switch harness with a new switch, switch harness, relay and relay harness. For the re units built prior to January 1, 1999, the kit will also include a 20-ampere manual circuit breaker. Owner notification began December 15, 2001. Owners who do not receive the free remedy within a reasonable time should contact amtran at 800-843-5615.