Why does my fire extinguisher feel cold or frozen after use?

A very cold cylinder can happen after use, especially if the extinguisher has discharged quickly. The manuals warn against putting the extinguisher in hot or boiling water, so do not try to warm it up fast. fileciteturn0file4turn0file11

1. Leave the extinguisher in a safe, upright place. Allow it to return to room temperature naturally.
2. Check whether the cylinder was recently discharged, even partly. A used extinguisher must not simply be hung back on the wall bracket. fileciteturn0file4turn0file11
3. Look for condensation, frost or dampness on the cylinder. This can be a normal reaction after rapid discharge, but it also makes inspection more important.
4. Do not place it near radiators, heaters, flames or boiling water. The manuals explicitly say not to expose the extinguisher to heat sources. fileciteturn0file4turn0file11
5. Do not test discharge it again. If you are unsure whether the extinguisher still works, it needs professional attention rather than another trial spray.

Stop using the extinguisher immediately if the cylinder stays unusually cold, sweats heavily, or shows any damage after use. If safe operation is uncertain, contact the retailer or store where the product was purchased and ask about the next steps.