If your Frigidaire Affinity dryer is beeping at you and giving you the "E64 CALL SERVICE" business, chances are you have a bad heating element. The good news is, 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.
First you'll want to unplug the dryer and shut off the water source.
Then disconnect the vent hose and the water feed (if applicable). Be sure and shut off the water valve first, or you'll have a mess!
Next you need to remove the lid, the back and the lid brace. To remove the lid: remove the screws and pull straight back. It may resist a bit at first. If it does, wiggle it a bit and it should break loose
Now remove all the screws holding the back piece on. Don't forget the ones in the middle, including the access panel.
The brace screws are are next. After you get the brace unscrewed, just pull it up and out of the way
Next (if you have a pedestal), remove the top screws of the pedestal brackets. Note: these screws are slightly different, so keep them separate.
Now you'll want to remove the screw holding the vent tube in. It should be screwed in at a slight angle. After you unscrew it, push the tube in as far as you can to facilitate removal of the back.
Now unscrew the power connection (you did unplug the dryer first, right?) and remove the back. It may take some effort to clear the tube, brackets and water connection. I usually pull the top out at a good angle and work it back and forth to free it.
Now that you have the back off, you can pull the vent tube out and move it out of the way. The heating unit is on the right and you'll need to remove 3 screws and some wiring connections to free it.
Now that the unit is free, turn it so you can pull it out, It may take some doing, but it should come out without too much trouble.
Once free, if you have a multimeter, you can test the coils. Set the meter to the lowest ohms setting and test each coil. You can also do a visual inspection, although it might not be obvious.
Once you have verified the problem, via multimeter or visually, you can replace the part and reassemble. WARNING: When reassembling, do not over torque the screws. Sheet metal bends very easily. Snug is good!
Reassembly is basically just the reverse of removal, however you may have trouble with the pedestal brackets when putting the back cover on. If you do, loosen the bottom screws on the bracket to give a little more wiggle room.
The new part will likely not have the mounting bracket attached, so be sure and not damage it when removing the heating unit.