Arrived to find loss of common coming out of defrost control board due to lizard shorting control board please see attached pics. Picked up new board and installed. While turning power off to breakers to change board and reapplying power to system found bad 30 amp breaker not passing 240 back to air handler. Replaced also on site with new. Made client aware of new maint plan with Mason apex and green light. Client would like to enroll into maint plan but have no task code to provide for that at this time. Tested system and all is working as designed also made client aware that all breakers are older and need to be replaced before they all start failing. Task Includes -Replacement of shorted defrost control board.