Mine is done as well. Recall does the following to contain a failure of the NH3 gas at the electrical element;
1) Additional metal panels installed to "box" the area where the failure could occur.
2) Gas solenoid wire from control panel is removed.
3) Wire with burn-out link is connected to control panel pin.
4) Wire from this link through a "snap" switch mounted on chimney (auto resets under trip point) and finally reconnects to solenoid.
>>Fix installed...see below.
