My outdoor heat pump will not operate. It is a Carrier 38YRA042330, with a Carrier Thermidistat thermostat and a Carrier Air Handler 40FFKB005300. I have a H5 error code on the thermostat will I put it in Heat mode and raise the setting to call for heating. I changed the air filter on the air handler when I realized the heat pump was not operating. The air filter was pretty dirty. The system will operate in aux/emerg heat mode, with the fan in Auto or On mode, and will maintain the thermostat temp setting. Thanks for your help. James, Newport News, VA.