When I turn the Cabin fan on I smell a funny odour?
When you turn the Cabin fan on and you smell a funny odour, the most likely cause of this odour is a leaking heater core. Heater core failures are quite common failures. When the heater core fails you will often smell a sweet scent especially when the interior fan is turned on. It is most noticeable then due to the fact that the air is being blown over the leaking area of the heater core. Another very common interior odour is mildew. This smell is generally caused by the AC evaporator and heater cores being located too close together causing condensation leading to leakage under the carpet. Newer model cars often have this problem occur.
