IDK. I've had
coils burn out without a resistance change. Some minor resistance changes could occur over time, I guess, depending on the coil material, but I don't believe a coil has to change resistances to be burnt. What I usually notice is decreased vapor production (in a drop in coil) just prior to a burnt taste, which is what tells me the coil is burnt.
Are you experiencing this with your
coils, specifically? Higher resistance plus taste of burnt coil? Because I don't think I've heard of this as a general rule of thumb. I guess it's possible with your specific setup, but I'd be surprised. It is equally as possible that I don't notice any slight resistance change, but I have definitely had coils burn out without any resistance change.
Some more information about what is happening, and why you are linking the two ideas together might be helpful.
Welcome,
Anna