ModTweaker allows you to add or remove forestry Thermionic Fabricator Recipes

You can call the package using mods.forestry.ThermionicFabricator

ZenScript
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//mods.forestry.ThermionicFabricator.removeCast(IIngredient product);
mods.forestry.ThermionicFabricator.removeCast(<forestry:thermionic_tubes:5>);

ZenScript
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//mods.forestry.ThermionicFabricator.addCast(IItemStack output, IIngredient[][] ingredients, ILiquidStack liquidStack, @Optional IItemStack plan);
mods.forestry.ThermionicFabricator.addCast(<minecraft:glass_pane> * 4, [[<minecraft:dirt>,null,null],[null,null,null],[null,null,null]], <liquid: glass> * 200);
mods.forestry.ThermionicFabricator.addCast(<minecraft:stained_glass:3>, [[<ore:dyeLightBlue>,null,null],[null,null,null],[null,null,null]], <liquid: glass> * 144, <forestry:wax_cast>);

ZenScript
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//mods.forestry.ThermionicFabricator.removeSmelting(IIngredient itemInput);
mods.forestry.ThermionicFabricator.removeSmelting(<minecraft:sand>);

You can add every liquid in the game as the result of the smelting, but currently only <liquid:glass> is recommended due to bugs occuring with other liquids.

ZenScript
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//mods.forestry.ThermionicFabricator.addSmelting(ILiquidStack liquidStack, IItemStack itemInput, int meltingPoint);
mods.forestry.ThermionicFabricator.addSmelting(<liquid:glass> * 120, <minecraft:stone>, 500);