My problem is I noticed my heat would not come on checked it the pilot was out. I lit it turned the knob to the on position and the burners do not ignite then after a minute or so the pilot goes out. Any ideas .Thanks

If the pilot flame is not strong and hitting the thermocouple good, you have a dirty pilot orifice or dirty pilot hood on the pilot assembly. If you have a strong pilot flame and its hitting the thermocouple good. Replace the thermocouple. You can get one just about at any hardware store for about $5 or $6.