There's something called the "Planck Temperature" that is the current limit of how hot something can be before the physics we use to describe it breaks down.
The Planck Temperature is about 1.4 * 10^32 K.$1.4 \times 10^{32}~\rm{K}.$ Above this temperature, we can't describe the behavior of a substance because we don't have a working theory of quantum gravity. Of course, 1.4 * 10^32$1.4 \times 10^{32}$ is many orders of magnitude hotter than anything in the Universe, so it's really only a theoretical limitation and only comes into play when we're trying to describe the nature of the universe immediately after its formation. Within a millisecond after the Big Bang, everything in the Universe was below the Planck Temperature
and there is a limit to coldness too!! yes
yes. its called absolute zero. Nothing can get colder than that. The temps are −273.15 $−273.15$ on the Celsius (centigrade) scale.[1] Absolute zero is also precisely equivalent to 0 °R$0 ^\circ ~\textrm{R}$ on the Rankine scale (also a thermodynamic temperature scale), and −459.67 degrees$−459.67^\circ$ on the Fahrenheit scale
hope it helped in resolving yo
