The AC is blowing hot air. The engine was replaced only 1,000 miles ago.
It sounds like your air conditioning has lost a charge. The refrigerant may have leaked, or they may not have charged the AC when they replaced the engine. I would have a technician come out and inspect your entire AC system, charge the AC, and inspect it for leaks.
Have a car question? Get free advice from our top-rated mechanics.
Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%