I have a gas heating system Weill McLean and it's approximately 8 years old, give or take. The pilot light won't stay lit while we push down the button on "light" and then back to "on".. please give me some sort of resolution to this problem. I did have a thermocoupler replaced a few years ago. Thanks for the information.

You might want to consider changing out that thermocouple. Replacing it every few years is not unusual.

At least clean it.