RTRM board flashing code 2 "system lockout" Reset the power, heat came on immediately. Space got from 65⁰ to 71⁰ in roughly 45 minutes System has two heating stages and two cooling stages. Both were wired to run only in high heat or high cooling Changed the wiring and the thermostat setup for 2 heat and 2 cool control. Coils are clean Filters are OK Blower running normally Cannot find any issues with the heating side of the unit. It is too cold outside to run the cooling mode today and test for proper operation.