My compressor for the central air stopped working and the thermostat has a picture of a small snowflake. What does that symbol mean?

It's certainly not snowing that's for sure. Seriously, I have no idea. What brand is the thermostat?

The Snowflake icon is displayed (flashing) if the thermostat is in lockout mode to prevent the compressor from cycling too quickly. The Flame and Snowflake icons flashing simultaneously on the 1F82-261 & 1F89-211 models indicate a Compressor Lockout. Also the Flame icon flashing on its own in the heat mode for both models indicates that Auxiliary Heat is energized.

The snowflake indicates that the thermostat is in the cooling mode, the thermostat may be calling for cool but if you are having a problem with the a/c equipment you still may not be getting any cool air. Mike

A solid snowflake also shows that you are in the cooling mode.