Do I need to have the system evacuated before removing the old condenser?

Yes. Your AC system must be properly discharged by a certified technician before disconnecting any refrigerant lines. Improper handling can damage the compressor and is illegal in most states. Once the old unit is out and lines are capped, the new condenser installs at the same mounting points, then the system gets recharged.

Will this condenser work if my original one is just clogged, not leaking?

A clogged condenser loses cooling efficiency but isn't always a reason to replace it — flushing the system might restore flow. If you've confirmed the condenser is internally restricted and cleaning doesn't help, replacement is the right move. This unit gives you a fresh start with full cooling capacity.

What's the return window if it doesn't fit?

Test-fit the condenser against your vehicle's mounting brackets and line routing before committing to installation. Once refrigerant lines are disconnected and reconnected, the unit is considered installed. Verify mounting clearance and line access in the engine bay first.