Arrived at location on 7/23/21 - put temp probe inside bottom oven. (Jason said it's the one) unit fired rite up came to 367 then dropped to 345 and came back on. After 30min. temp was less and variance was more. 325 to 330. Burner lit every time. changed controller and temp probe. Retested and temp and variance is good. Settled to 352. Had problem getting screws out for temp probe. Did remove them. Unit is operational job complete.