Occasionally, my blower moter on my furnace does not start automatically. If I turn it on manually, run furnace for a few minutes,and switch back to AUTO, the blower will work fine for a few days. Then it starts acting up again. Is it my manual/auto switch for the blower moter?

There should be a delay on the start cycle for a gas heater. The T'stat will call for heat, the gas comes on and then a minute or so later the blower should come on. That's normal.