How do I replace the spray arm? The hole in the cabinet is round and the gasket is oval. Do I just squish it in and hope it seals? It appears that the arm is also supported by the rack somehow. Any help is appreciated.
Here are your parts
Replacement parts for FRIGIDAIRE GLD2250RDC2 Frigidaire/dishwasher | AppliancePartsPros.com
If you mean Item 32A in Section 4, it looks like it should be round not oval.
This may also help, though your model is somewhat different.
http://frigidaireservicetips.com/pdfs/484_2.pdf
I think I got it. It snaps to the rack and it is a pressure seal to the spray arm.