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Discussion Starter · #1 ·
I recently bought a 08 Q7 3,0TDI and in the VCDS I could not get any connections with
the auxiliary heater, fault code 01207 004 no signal/communication, checked the fuse and it was blown, replaced it with a new one and the auxiliary fan started immediately and does not stop, can’t get any connections with the control module now either so only way to stop it is by removing the fuse….

It is only the fan that starts, no combustion at all, just cold air coming from the exhaust pipe…

Does anybody know what the problem could be…
 

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