The most common cause of the air conditioning blowing warm air is a refrigerant leak. Refrigerant can leak from any of the components in the system. A car’s AC components are located in different areas in the vehicle – not all together in an easily replaceable unit like a house AC “window unit.” If there is no dye in the system, the leak may trickle out clear oil.
Detect a Hard to Find Leak – Troubleshooting
With a freon leak detector, the leak can be detected even if it is a very slow one. A common place to detect an evaporator leak is from the evaporator drain.
Car A-C Problems – Troubleshooting Auto Air Conditioning
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With all this cost and need for power, I propose a lighting system of low wattage bright lights, in blue, green, red, yellow or amber, each light with .5 to 2 watts. These lights will run off the vibrational energy from the use of lots of base in their sound system or the bumps in the road.