The burners come on then cycle off after a few seconds, then come back on and stay on until it is suppose to cycle off. My hvac guy replaced the burner chamber thinking this was the problem but this did not take care of the problem. Any input into this problem would be greatly appreciated. Thanks and have a wonderful summer.

The first thing I would try is to clean all burners and flame sensor, check and recheck and then check again the gas pressure going through the gas valve. Some times you have to cycle the equipment under extreme circumstances for the problem to show.

This sounds to be a dirty flame sensor to me as well