Heater won't start working until I've drove a couple of miles in the morning

If the blower is not working at all in the morning then you need to check for power at the blower when it isn't working. If it's getting power and not working then you know the control side is ok and that the blower itself is faulty. Could have a dead spot in the motor. Use this link to find a good shop near you. https://repairpal.com/repair-shops Alex