Adaptive Equipment problems of the 2010 Chrysler Sebring

The air conditioner freeze plug, rubber part melted and blew out from the engine. I have saved it. . I was told by a mechanic that the type of plug with rubber could cause continuous blowout and that should not happen based on the 18,428 miles that was on the car which was purchased new on 12/24/2011 with 63 miles on the odometer at the time. Fortunately, the car basic warranty is still valid to help with the repair cost after towing it to a Chrysler dealership that is an authorized warranty repair shop. Note: I left the car for repair on tues, July 2, 2013 but as of today Monday, July 8th, 2013, I have not been able to get a diagnosis from the dealership repair shop. I have called on several occassions but was told that their mechanic shop is shortstaff and I have to wait until they can get to check the car when there are enough mechanics to attend to all of the pending repairs on the cars that are waiting for service at this time.

Further to my last email dated 7/8/2012 which was assigned odi number 10523670. I wish to advise that as of this date, I have not been able to be told what the mechanic diagnosis is?, even though I have made repeated follow-up calls as suggested by various service personnel, 1. Bruce warren, 2. Jose and 3. George at soutars Dodge dealership, 631 west main st, barstow, CA 92311, ph 760-256-3502. They all promised to get back to me but never did. My last call on tues, 07/09/2013 in the afternoon, I spoke with mr bruce warren who first attended to me on tues 7/2/2013 when the car was towed in from baker, CA and left for warranty repair, etc, he told me that the mechanic tried 4 freeze plugs which did not work and they are waiting on a fifth one which will hopefully will work. Note: the first mechanic in baker, CA who checked the car there ,told me that he ordered, received and tried a freeze plug using all of the details pertaining to the manufacture specifications but that did not work because it was too small. Mr bruce warren at the dealership service also told me on thue 07/09/2013, that the last 4 freeze plugs that they ordered and tried using were too small. How and why this is happening, I am finding it hard to understand?.