I am trying to use the blower on an old Milwaukee-Thermoflow Model 1103 to push air for a second hand central air system I put in, the furnace is oil fired forced hot air, the cooling exchanger is all installed in the output plenum and I have the thermostat wires run to a Lux heating and cooling controller, the thermostat runs the heat but won't run the cool, I did notice the transformer puts out almost 29VAC the contactor in the compressor needs 24Vac and the compressor works because I tested it with a 24VAC plug in transformer, so what am I doing wrong I know it will work ?

Help!!