Audi Electrical Diagnosis – HVAC Blower Motor and Control Module Failure

Awww Audi Mike our shop foreman at the Atlantic Technical Center (ATC) discovered this today when diagnosing a HVAC fault in a client car. Nice call Mike! Now this is bad...whenever we find melted connectors, it's what we call a "clue", but also is a very interesting find, instructive even. Especially if you understand Ohm’s Law or E = IR, and also the relationship between heat and resistance, also known as P=I2R. Great question! Normally electric power is useful, making a lamp light or a motor turn for example. However, electrical energy is converted to heat whenever a current flows through a resistance and [...]