Air flow restriction in A/C and heat

Try all fan speed settings to determine if you have air flow on any (particularly High speed). I don't know the specifics of your Echo, but typically high speed is a straight-through connection for power to the blower motor.
If high speed works but none of the slower speeds do, the issue is very likely the blower motor resistor or the resistor connector.
If none of the speeds work, there might be a bad fuse for the blower motor or the motor itself might be bad.
If you can hear the blower on all speeds but still no air is coming out the vents, the issue might be either a damaged diverter door that is not properly directing air flow or possibly something got sucked in to the blower motor squirrel cage and is severely restricting air flow. -Rod

resister either defective or wire incorrectly probably, try running jumper wire to motor to see if it has full speed.

Vent doors not open correct

check wire on vacuum lines behind the radio may of gotten loose it sounds like the control for heat and cooling are unpluged.

not sure of exact location in the dash but there is a paper filter, if it is clogged it will restrict air flow from the blower.

replace the cabin air filters

Your message is a bit confusing but since there is a vehicle model shown, I'll assume that is the A/C causing problems.If the blower does not push air on either heating or A/C settings, the bearings of the motor may have gotten gummy and are not allowing the motor to spin up. Check the different speed settings for the blower, preferably with the controls set to heating since there are additional controls when on A/C that can confuse troubleshooting. If the highest speed is working, then the speed control resistor has failed. If it does not move air regardless of setting, then the blower motor has failed or the bearings sticky.
If you have added gas to your home A/C, I hope you know which gas is used (R-22- NOT R-134 as in cars) and have not overcharged it since that can caused very high pressures that can damage your system. Different systems also have different intake and output pressures with which the compressor and other system components work best.

is the fan motor working at full speed
check for blocked cabin air filter
the vacuum only works the vent controls and as you can feel the changes of the vents , it is not vacuum

can you hear the fan working on all speeds?

your blower motor might be damaged.replace the blower motor of the air con.