Originally Posted by dasams
Could the Parallax be at fault? The fan seems to be on about 20% of the time. Is this excessive?
I don't know your exact set-up or model number, but I will tell you that our Parallax unit failed this year and darned near burned down our rig. Our battery began to cook because of it, but we caught it in time before it was totally destroyed.
The failure was traced to a short circuit, and Parallax admitted to us that it was the fault of their product. Because it was still under warranty, we shipped it back to them so that they could diagnose whether a they were obligated to replace it at no charge, which they did. They also told us that they'd seen a few other similar failures in the product.
You can read more detail in this Air Forums post
and see if there's possibly a correspondence to your own situation. Good luck with it.