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What Are the Reasons Why the Heating in a V.A.G Group Vehicle No Longer Works?

Model: (Various brands) Various
Part: Radiator

Video tutorial

This procedure is valid for all vehicles in the V.A.G group, including Volkswagen, Audi, and Seat. When the heating no longer works and warm air is not coming through, or water is leaking from the reservoir (which seems to be a common issue), it is likely due to a radiator clogged with dirt, or the water pump has seized (again, due to the same problem).

What needs to be done is to flush the system with special Volkswagen fluids (for dirt dissolution and fixing) that can also be found on eBay (code 385027142783). The kit is not cheap: £156.50 for the two fluids, with free delivery.

You should also check that the water thermostat is functioning.


Updated on 15 August 2026 by ScegliAuto


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