How to Unlock Heat Tolerance in Subnautica 2: A 2026 Survival Guide

Players looking to expand their exploration into the volcanic regions of Subnautica 2 must first unlock Heat Tolerance to survive the extreme temperatures of the game's deeper biomes. This survival mechanic is essential for accessing high-tier resources located within the volcanic ocean zones. At In Game News, we have compiled the necessary steps to help you navigate these hazardous areas effectively.

To acquire Heat Tolerance, follow these steps:

1. Scan two Sonic Resonators in the wild to unlock the blueprint.
2. Gather the required materials: one Basic Battery, two Titanium Ingots, two Lead, and one Wiring Kit.
3. Craft the Sonic Resonator at your fabrication station.
4. Locate an Angel Comb and use the Sonic Resonator to clear the bloom infestation.
5. Harvest the Angel Comb bulb to gain Heat Tolerance.

How to Unlock Heat Tolerance in Subnautica 2

Heat Tolerance is a specific player upgrade required to withstand the boiling waters of the volcanic biome. Without this, your character will take rapid damage upon entering these zones. The process involves interacting with the Angel Comb flora, which is currently obstructed by a bloom infestation. You cannot harvest the required bulb until this infestation is removed using specialized sonic equipment. This is a mandatory progression step for any player aiming to traverse the full map in 2026.

How to Make a Sonic Resonator

The Sonic Resonator is the primary tool required to solve the infestation puzzle. Before you can build it, you must scan two of these devices in the ocean. The most reliable location for these scans is 300 meters north of your initial Lifepod at the Old Habitat point of interest. Alternatively, players can search near the Spider Dome point of interest, located 240 meters southwest of the Lifepod, where a metal crate often contains the necessary components.

Once you have the blueprint, you will need to gather specific materials to craft the device at a fabricator:

• Basic Battery (1): Created using two copper and one Acidic Raion Pouch, both found in the starting cave systems.
• Titanium Ingot (2): These require a processor to craft. You can scan broken processors at the Old Habitat to unlock the processor blueprint. Each ingot requires three titanium pieces.
• Lead (2): Found in abundance within the ravines and overhangs near the Old Habitat and Camp One points of interest.
• Wiring Kit (1): This component is crafted using silver ore, which can be mined from outcrops in the mid-range exploration zones.

Angel Comb Bloom Infestation Puzzle Solution in Subnautica 2

The Angel Comb Bloom infestation puzzle solution in Subnautica 2 requires the use of the Sonic Resonator you just crafted. Once you have reached the volcanic biome, you will notice the Angel Comb and its juvenile offspring covered in a thick, restrictive bloom. This bloom prevents you from interacting with the plant's core.

Approach the infested plant and equip the Sonic Resonator from your inventory. By activating the device, you emit a frequency that clears the bloom infestation. This action is instantaneous once you are within range. Once the bloom is cleared, the Angel Comb bulb will be revealed, allowing you to harvest it. Consuming or utilizing this bulb provides the permanent Heat Tolerance upgrade, enabling you to survive the surrounding volcanic waters.

Tips for Navigating Volcanic Biomes

Exploration in Subnautica 2 requires careful resource management. Because volcanic biomes are inherently dangerous, we recommend ensuring your oxygen supply and health are topped off before attempting to clear the infestation. If you find yourself struggling to find the necessary materials for the Sonic Resonator, consider checking our survival guides for more detailed maps of the starting area.

Remember that the environment is not static. If you are playing on PC, ensure your drivers are updated to maintain optimal performance in these dense, particle-heavy volcanic zones. For further assistance with game mechanics, visit our Subnautica 2 coverage hub.

Frequently Asked Questions

How do you get heat tolerance in Subnautica 2?

You obtain heat tolerance by using a crafted Sonic Resonator to clear the bloom infestation surrounding an Angel Comb, which then allows you to collect the bulb.

How to unlock heat tolerance in Subnautica 2?

To unlock heat tolerance, you must first scan two Sonic Resonators to obtain the blueprint, craft the device, and use it to resolve the Angel Comb Bloom infestation.

What is the Angel Comb Bloom infestation puzzle solution in Subnautica 2?

The solution is to equip and activate a Sonic Resonator near the Angel Comb to clear the surrounding bloom infestation, revealing the harvestable bulb.