My 2007 Saturn relays blowers are not working. Back vents work though?

If you can hear the blower motor working but no air flow you could have a few different issues. There can be some sort of blockage from a part that possible broke off in the vent. The squirrel cage for the blower could be damaged or not spinning or there is a blend door that is not working and not allowing air to flow. I would start with a visual inspection of the blower motor. Alex

Check cabin filter.