Atwood Air command Heat Pump

My POS Atwood Heat Pump still does not work.....Now when it satisfies the thermostat the fan will come back on for 5 seconds then go off for about 5 seconds.....this cycling on an off continues until I can stand it no longer and just shut the whole thing off... When it is in A/C mode the fan never shuts off the compressor cycles on and off as needed......

Is the FAN setting on AUTO? If so, you could try changing it to LOW and it'll run continuously.