Hi @lauralallen
Here's the [document|40876|tech data sheet] for the unit.
Go to p.6 of 28 (pdf) to view the procedure to run the dryer diagnostic tests and check what error codes are being shown.
There are wiring diagrams on p.27- p.28 (electric and gas models).
If you find the problem and it is a faulty part that needs replacing, here's the [https://www.searspartsdirect.com/model/3pknud4dqn-001428/frigidaire-flce7522aw3-laundry-center-parts|parts list] that is useful. Locate the wanted part in the list and note the ''manufacturer's part number'' that is shown with it. Search online for the part number ''only'', to find suppliers that suit you best.