No power to the unit at all

Anyone have any suggestions on this scenario. I have an old Rheem Imperial 90 Plus. I recently changed the Inducer Blower after a back up had gotten water into the old one. The furnace worked fine afterward but would shut itself off a few times a day. Just flipping the power switch off and on would get it going again. To fix the fact that it kept shutting off I replaced the limit switch that is on the Blower. Again the furnace worked fine afterward but was still shutting itself off in the middle of the night. I proceeded to replace the other safety switches (the flame sensor and the high limit switch). After this I now have no power to the unit at all. Prior to replacing these last two new parts the furnace was actively heating the house. Any clues on why I now have nothing happen once the breaker and power switch are turned on? I've replaced the batteries in the thermostat and no there is power coming from the breaker box because the hot water heater is still working..... Getting cold! Any suggestions would be greatly appreciated. Thx

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