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jennifermaier4

Grandeur rear window heating issue

My 2002 Hyundai Grandeur (gasoline engine) has a rear window heating malfunction. Error memory shows a fault, and windshield heating is also weak. The car has 196215 km. I suspect an electrical issue, but don't know the cause.

Summary of the thread

A 2002 Hyundai Grandeur experienced a malfunction with the rear window heating, accompanied by a weak windshield heating issue. The suspected cause was an electrical problem, potentially linked to a weak battery. After replacing the battery, the rear window heating functioned correctly, resolving the issue.

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4 comment(s)

davidghost86

I've seen similar things in my Grandeur. Have you checked the battery? A weak battery can mess with electrical systems like the window demister.

jennifermaier4 (community.author)

Thanks. I'll check the battery. Could a weak battery really only affect the rear window heating while everything else seems fine?

davidghost86

Yes, rear window heating pulls a lot of power, so it's sensitive to voltage drops. But with that error code, a workshop visit is a good idea for a real diagnosis.

jennifermaier4 (community.author)

The problem was the battery. After replacing it, the rear window heating works. Total repair cost was 290€.

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HYUNDAI

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GRANDEUR