How much to replace heater core in 2003 buick regal?

Stephen Pearson

• 49 Answers
• Posted on Dec 01, 2008

SOURCE: Heater only blows cold air

Check both heater hoses under hood to see if they get hot, if they do the heater is fine. need to check to see if the selection doors inside the unit are opening and closing.

SOURCE: Heater blows cold air when idle

Sounds like you may have a partially plugged heater core. You could flush this out separately, from flushing radiator & engine block. Diconnect heater hoses going to your heater core and clamp off, so not to loose coolant from engine. Now hook up separate hose to one side of heater core pipe and flush out with typical garden hose. Repeat procedure on both heater core inlets. Reconnect original heater hoses and test difference. You may have to add an additional litre of antifreeze. If this don't work i suggest changing heater core. Good luck.........Ron.

SOURCE: where is the heater core, on a 1986 Buick Regal??

under the dash on the passenger side

SOURCE: 99 Buick Regal LS dual climate control. No heat passenger side.

the motor for the passenger side
blend door is shot

SOURCE: a/c blows hot air on drivers sde

The actuator door on the driver's side is out of position and needs to be reset. Remove the negative battery cable for 1/2 hour to reset the computer. Start the HVAC system and you should be able to hear the door adjusting itself and cold should come out of the driver's side vent.