# Service bulletin FDM\-TSIB\-031

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: 10206172
- Published by NHTSA: 2022\-01\-07
- Manufacturer's number: FDM\-TSIB\-031
- Manufacturer's date: 2021\-12\-06
- NHTSA component: ENGINE AND ENGINE COOLING; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:CONDENSOR/EVAPORATOR; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL

## NHTSA's summary

This bulletin provides instruction for relocating the AC system thermostat probe in the evaporator core to prevent AC system freeze\-up. AC system testing was performed after receiving reports of system freeze\-ups. Testing showed moving the location of AC system thermostat probe in the evaporator core improved overall system performance and reduced system freeze\-up.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10206172-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10206172-9999.pdf)

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

## Components

Engine, Equipment and accessories, Glass, wipers and mirrors, Heating and air conditioning, Labels and manuals

## Vehicles listed

- MACK MACK

JSON: [/v1/bulletins/10206172](/v1/bulletins/10206172)

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