The rear window heater is an important component of the Audi A2's defogging system, but it can sometimes fail to function. What are the steps I should take to troubleshoot and fix this issue?
ReplyFirst, check the fuse for the rear defogger and replace if necessary. Then, test the relay and replace if faulty. If the heater still doesn't work, it may be a wiring or switch issue. It's best to consult a mechanic for further repairs.
Start by checking the voltage at the heater grid connections. If the voltage is correct, the grid may be damaged and need to be replaced. If the grid is fine, the issue may be with the control module. A diagnostic scan can help pinpoint the problem area.
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