# Service bulletin SC\-19\-123

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 11014234
- Published by NHTSA: 2025\-02\-12
- Manufacturer's number: SC\-19\-123
- Manufacturer's date: 2020\-01\-02
- Campaign id or software version: SC\-19\-123
- NHTSA component: ELECTRICAL SYSTEM

## NHTSA's summary

Transit bus software update to the HVAC provided by the vendor due to the ability to heat with no cabin fan which results in the heater safety switch faulting.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-11014234-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-11014234-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Electrical system

## Vehicles listed

- 2019 PROTERRA CATALYST

JSON: [/v1/bulletins/11014234](/v1/bulletins/11014234)

[Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%20SC-19-123&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F11014234&vehicle=Service%20bulletin%20SC-19-123)