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louisfox10

RC Defrost Air Distribution Fault

Has any other owner experienced similar issues with the air distribution in their 2019 Lexus RC hybrid? I have a malfunction within the climate control system, specifically concerning the defrost air distribution flap. Symptoms are an error stored within the vehicle's diagnostic system, and diminished heating output. Preliminary diagnostics suggest a potential defect within the cable or plug connection. Currently has 165481 km on the odometer.

4 comment(s)

kurteagle5

Interesting. I own an RC as well. Your symptoms mirror an issue I encountered some time ago. The low heating output, combined with the error code, strongly suggests a problem with the flap motor or its associated wiring. It sounds like the air isn't being directed correctly. Have you checked the blower motor speed and air circulation to ensure those are functioning as expected? It might be a related issue, similar to a clogged artery affecting blood flow, even if the heart (heater core) is working fine.

louisfox10 (Author)

I have indeed verified the functionality of the blower motor across all speed settings, and the air circulation system appears to be operating within normal parameters. Could you elaborate on the specifics of your experience, such as the error codes you encountered and any diagnostic steps you undertook prior to resolving the issue?

kurteagle5

While I don't recall the precise error code, the symptoms were identical: weak heating and a code pointing to the air distribution flap. I didn't delve too deeply into it myself, as I lacked the necessary diagnostic equipment. Given your level of expertise, you've likely exhausted most at-home troubleshooting options. I recommend consulting a qualified workshop for a thorough diagnostic assessment. In my case, the repair cost was around 95€.

louisfox10 (Author)

Based on your experience and the convergence of our diagnostic findings, I shall proceed with a professional evaluation at a trusted workshop. The problem was a defective cable connection, resulting in total repair costs of 95€ as predicted.

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