The average cost of a heater core repair is from about $560 to $730, as of 2015. This is made up of from $465 to $590 for labor and $95 to $140 for parts.
When the heater core needs repair, the windows may fog up, coolant may leak around the dashboard, a sweet smell may be noted inside of the vehicle and mysterious coolant loss may occur. Commonly, the heater core connections are damaged by worn engine mounts that allow the engine to move more than it should. These mounts should also be replaced to avoid damaging new heater hoses and parts.