It is more likely to break while using on AC, however if a break occurs, it would be less likely to ignite and cause a fire. It is less likely to break while running on gas, however the potential fire danger makes gas operation much more risky. If at all possible, it's best not to use it at all until after the recall has been performed. After that, running on gas only would be preferred (for longevity reasons) because it puts less stress on the boiler. If you need to run it before the recall, for safety reasons, run only on AC electric during the day (12vdc is better if you have that option), & shut it off at night. Tim
