Called them at midnight and they answered the phone, came out the next day when they said they would. The tech came out and told my wife the coil was rusted out and needed to be replaced at a price of $3000. I know copper doesn't rust, it corrodes and that there is a chance the coolant eroded the copper coils, also because we lost our compressor the year before. The $3000 price tag seemed high since I can buy a new air handler for about $900. The tech stated the coils were not part of the air handler and we would still have to replace them. I am not an expert here but all the units I found online had coils, maybe I got lucky. Angie's list listed a coil replacement costs at around $1200. I called another company in for a second opinion and he found a small leak at a solder joint, repaired it, added some refrigerant and went on his way for $300. Williams did send me a thank you email for us paying them $65 for a service call, nice touch. I responded back to them about the actual repair and how I was disappointed with their repair quote, they refunded my $65 fee with out me asking for it. Due to the refund I upgraded them to a star, their customer service part of the company seems to be on point.
I hope this is an isolated incident but I wanted to post my experience so others don't get taken for $3000 on a repair that costs $300.