Safety valve would not open

I am an HVAC tech by trade so it wasn't difficult to diagnose problem with safety valve. The hard part was being without an oven for a week. Repair was simple and effective--oven works good as new.
Shut off gas and unplugged oven. Removed floor of oven between broiler and bake section, used wrenches to disconnect gas line from safety valve in back of oven, used philipps head screwdriver to remove burner assembly and gas valve, reversed process to replace. Checked out operation--OK.