A/C - Odors On Hot/Humid Start Up: Overview

90pontiac24
Bulletin Number: 91-1-3
Reference Number: 051201
Publish Date: 10/90
Subject: AFTERBLOW MODULE INFORMATION / INSTALLATION ON A/C ODOR CONDITION

Models

Affected: 1985-91 ALL MODELS
This bulletin is intended for information purposes only and addresses A/C odors emitted from the air conditioning system, primarily at start up, in hot humid climate. This odor may be the result of foreign material, or microbial growth, in the heater/evaporator plenum. Past Service Bulletins, (Examples: 89-1-3, 90-1-6, 90-1-16 and 90-1-18) address specific procedures for resolving this condition, on various carlines. Each of these Bulletins, in part, require the installation of an afterblow module to ward off recurring odors.

This Bulletin has been released for three (3) reasons:

1. It describes the proper function/testing of the module:

It covers the general module input/output requirements, necessary for afterblow operation:

3. It summarizes the various A/C afterblow module circuit diagrams which have been previously published in a number of Product Service Bulletins.