Samsung Smart Inverter heat pump

[muskyman]

I recently installed a samsung heat pump model aqv24j.I ran the unit in test mode and it works in heating and cooling mode.In cooling mode the ac will not come on ,but it will in dry mode.In heat mode it does not shut off. If I warm the return air sensor the ac will come on, so i thought i had a faulty sensor.Replaced,and unit still does the same thing.Any help would be of great help. Thanks

[nike123]

I recently installed a samsung heat pump model aqv24j.I ran the unit in test mode and it works in heating and cooling mode.In cooling mode the ac will not come on ,but it will in dry mode.In heat mode it does not shut off. If I warm the return air sensor the ac will come on, so i thought i had a faulty sensor.Replaced,and unit still does the same thing.Any help would be of great help. Thanks

Replace or fix PCB! Probably some faulty resistor or condenser in that sensor circuit!