Performed a two system maintenance checking heating. Starting with the inside air handlers, checked blower amps, heat strip amps and checked filter. Found both filters needing to be changed out. Found that the downstairs unit has a blower motor ecm going bad causing the motor to spudder when starting up and stay like that. Was able to reset the breaker a few times and get it unstuck. Motor may fail again in future. Checked outdoor units amp draws and pressures. Checked reversing valve. Found that the downstairs unit is also a few pounds low on Freon. System is out of warranty. Recommended a leak search for downstairs unit. Sent estimate over for repairs.