Version info

Modern Industrialization 2.2.25
Minecraft 1.21.1
NeoForge 21.1.79
Modpack: Craftoria 1.9.0

Expected result

All MI boilers eventually reach their theoretical max output.
For example, an Advanced Large Steam Boiler should be able to produce 1024 mB/t of steam.

Actual result

In some cases, a large boiler's temperature caps at a value about 1 degree below its maximum, reducing its steam production by 1 mB/t.

For example, an Advanced Large Steam Boiler, whose maximum operating temperature is 2500 °C, may, when at max temperature, report its temperature as 2499 °C. Using AE2 interfaces or other methods to measure the boiler's steam output will show it as producing 1 less mB/t of Steam compared to the nominal production rate (1023 mB/t vs 1024 mB/t).

Steps to reproduce

1. Build an Advanced Large Steam Boiler.
2. Pipe water into the boiler and steam from the boiler.
3. Wait until the boiler's water input hatch is full, then start piping fuel into the boiler.
4. Wait until the boiler reaches max temperature.
5. Observe the boiler's temperature and steam production.

If fuel is piped into the boiler and it reaches max temperature before receiving any water, the temperature and steam output will properly cap at 2500 °C and 1024 mB/t (versus 2499 °C and 1023 mB/t).