Why did they change the engine just for a thrown belt? Did you drive too far and blow head gaskets?
Yes, there should be 2 hoses leading from the engine to the bulkhead for the heater core. Check those, both to be sure they're there and hot when the engine is hot. Move the temperature control around and observe the actuator cables and listen for the blend doors moving. Check any vacuum lines to the airbox.
Next, check your white pages for your state's Bureau of Automotive Repair and report that store to them. Next, contact Pepboys directly, not the store. Lastly, lodge a complaint with the BBB.
Monday, December 5th, 2011 AT 2:32 AM