No heat from AC after new coils in air handler and new thermostat
You need to find a real heat pump service person. It's hard to trouble shoot a system without being there. Did he put in a correct refrigerant charge amount and the correct type refrigerant? Is the new coil the same size (BTU) capacity as the old coil? Does it have the same type expansion valve? Has anyone used gauges, if so what do the pressures do when the unit heats then begins to cool off? Does the compressor change it"s tune level? What happens to the temperature of both the small and larger line when this heating and cool off happens? It's not rocket science you just need to know what is happening with the system and what should be happening at any given time in the "on cycle".