TSB Document:

• MC-10123017-9999.pdf

Affected Component: VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:HEATER CORE

Summary

Technical Bulletin (No Heat from Passenger Side Cabin ? Heater Core Restricted): Excess flux from the aluminum cooling system components (EA189 TDI engine CKRA) contaminates the cooling system. This over time causes a high acidic concentration in the coolant. The result is oxide particles (aluminum rust) and excess flux restricting the heater core. This document contains information on how to diagnose, and service this issue.

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