Found solid state timer is not consistent. Unit shut off on me in the middle of a cycle. Increased time on timer and unit still does it at random. Showed Carol how to switch it to manual if it acts up again. Jill said it was okay to order timer. - Waited until customer was done using unit. Changed out the relay (Tr2) & restarted unit. Sent 1 tray through and waited. Unit shut off @ 3 minutes. Timer relay set at 3 min. Okay & back in service.