No, you cannot flush a brake system with brake cleaner alone. Brake cleaner is not designed to be a substitute for brake fluid and should not be used to replace or refill the brake fluid in your vehicle's brake system.
Brake fluid is a specially formulated hydraulic fluid that is used in the brake system to transfer force from the brake pedal to the brake calipers or wheel cylinders, allowing your vehicle to slow down and stop effectively. It operates under high pressure and temperature conditions.
On the other hand, brake cleaner is a solvent-based cleaning product designed to remove dirt, oil, grease, and other contaminants from brake components, such as brake calipers, rotors, and pads. It is not suitable for use as brake fluid, and using it as such can be dangerous and lead to brake failure.
If you suspect that your brake system needs flushing, it is essential to use the appropriate brake fluid recommended by your vehicle's manufacturer. Brake fluid should be replaced periodically according to the maintenance schedule provided in your vehicle's owner's manual. Flushing the brake system involves removing the old brake fluid from the system and replacing it with fresh fluid to ensure the brakes function correctly and safely.
If you are unsure about how to perform a brake system flush or have any concerns about your vehicle's braking system, it's best to consult a professional mechanic or a certified automotive technician to perform the task correctly and ensure your safety on the road.