| Laclale♪ |
Since it doesn't do damage, I'd say it's a sperate effect that just happens to have the fire trait because of its flavor text. Although, if you wanted to flavor it as defibrillators or something and give it the electric trait to match your variable core, that's a reasonable ask for a gm.
Don't forget Explosion class feature too. Sentence after "Although" is fine.
Cordell Kintner
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"When using the Explode action, or any time your innovation explodes on a critical failure and damages you, change the damage type from fire damage to the type you chose."
Searing Restoration is neither of those, so it wouldn't change the trait.
If you roll a 7 or lower on the Unstable flat check however, you would take the different damage type after the Searing Restoration finishes.
| Ventnor |
There are a few interactions, like the Conduct Energy action you can use if you're wielding a Resonant Weapon, that need you to use an action with the Fire trait beforehand. So you could heal with one action while boosting the damage of the strike you'll be making with one of your later actions.