[Chester Stone]

A few years ago my thermostats bit the dust and I installed new ones acquired from Newell.  I admit that their schematic left a lot to be desired.  I have been curious for some time that my rear A/C system does nothing when set to low fan.  However it seems to cool fine when set to high fan (two compressors).  I finally got around to checking the amps going to all four A/C capacitors.  All four have 124 volts available to the control board, but the incoming amps for the rear number one compressor only draws 8 amps while all of the other three draw about 11 amps.  The draw going from the control board to the number one capacitor is only 4 amps while all of the other draw about 10 amps.  I am embarking on the installation of high capacity relays, and want to be sure everything is operating OK.  Any suggestions as to what might be wrong would be welcome.