Not professional advice: The Frigidaire Affinity dryer "E64 Call service" error is telling you there is a problem with the heater. If this happens, you must take the dryer apart and check the heater circuit.
With a screwdriver, a pair of pliers (a multimeter if you have one) and a new heater element, you can fix this yourself and save a couple hundred bucks. Make sure to disconnect the dryer before performing any service or repairs!
Check out the step by step process for dealing with the E64 error from The Random Fix which includes photos.
In the news, LG Electronics (LG) will be unveiling its latest front loading and top loading washer-dryer pairs at the 2014 International Consumer Electronics Show (CES) in Las Vegas. Find out more here.