Put new heater core in now 2009 hhr now after driving when i turn it off and remove key gauges move and dash lights flash how can i fix

the heater core is inside the dash and is a huge project to get at. you may end up removing most of the dash to get at the box to get at the heater core. you can follow the water hoses from the engine compartment into the cab,. that will give you an idea where it is. it is in a sealed big box and is a job to do if you think you cant figure it out. get a book first or find videos before you start. some cars are easier then other. i have not done the hhr so not sure how bad it is. my chevy pickup i had to take the whole dash out to get it out

Yes, that would probably be the culprit. There is a blend door inside of the air box that switches from heat to cool. Either there is an obstruction keeping the door from moving, or the actuator that moves the door is not operating.

Is the security light on or blinking?If not then do you have power to the starter.You can check this with a test light.You should have power when you turn the key to start.The test light should light up.Should be the small wire.I believe it is purple in color.If the security light is on then you will have to get the codes to see what is causing the no start.Hope this helps.Good luck.

get on youtube, and you will find the info that you need most of the time. you may need to remove the entire dash, to access this unit. so, be very sure what you are doing, before you tackle this job.

your alarm system has been tripped when the battery went dead, to get the information on how to reset the alarm is to call the car manufacture to get the procedure, and should not cost you anything.

Do you mean Heater Core???

Disconnect the negative battery terminal.

Disconnect the top and bottom hoses from the heater core next to the firewall)

Pull off the steering wheel
Undo the steering wheel bolt.
Undo the 3 screws holding the steering wheel cover in place, unclick them and put to the side.
Undo the centre console
Undo the glove box - you'll need to manipulate the stops on the inside and let it fall to the floor before - undo the two bolts at the bottom.
Remove the Instrument panel, radio, radio frame.
Undo the single screw in the bottom of the casing surrounding the vents control, gently pop out the vent plate.
Undo the 4 screws holding the vents controls in place.
Remove the frames that are holding the vent controls in place (either side of the centre colsoles (or where they were)
Remove the two side vents (push down and pull back).
Remove the two bolts (either side) that are holding the dash up.
Remove the two bolts (bottom left corner, bottom right corner) that are holding the dash up.
Gently pull the dash up and forward to (making sure you don't pull any wires off there guides and place to the side).

Put the dash to the side (resting on the front seat)

The heater core should be sitting in the middle of the dash.

Remove the four bolts (two top, two bottom) and place to the side.

Pull the heater core back and move to the side to clear the holes in the firewall.

Manipulate the heater core to the side and move out through the gap in the dash and the cross bar (it is a tight squeeze but you can get it out)

Installation is the reverse of all the instructions.

when you have finished installing the heater core make sure you bleed the engine with coolant

Top up the radiator - keep the cap off, turn on the engine, turn on the heater on the heater to full, with the engine running keep topping up the radiator as the water runs through the new core...keep doing this until no more water goes through - this last step takes a while so be patient otherwise you will start to drive the car and will have an overheating engine very quickly...

I just did mine last weekend and my my its a job I pulled the seats out to make it easier and if it has ac that will have to be discharged also. well start by removing your center console then your radio then take off your dash speaker covers off and your defroster covers off you will see a bunch of bolts that hold on your dash under all them covers so go ahead and remove all the bolts then move down under the dash and there is a bolt on both corners of the dash that goes into the lower panel remove them I also removed the bolts the hold the steering wheel up so it can lower down alittle to give you more room then ontop of your gauge cluster you will see two screws that holds the gauge cover on remove them and in the cover you also have headlight switch and hazzered and rear defroster make sure you unplug the harnesses to them then you will have to start unhooking all the other plugs and wiring that plugs into things on dash then get the dash out oh the way and go under hood and remove heater core hoses and you will need a specal tool to remove ac line then you will see one bolt next to the heater core hoses so go ahead and remove that then back to inside you will see the brackets that hold on heater Assembly onto the car and go ahead and remove them and pull whole assembly out and you will see the heater core cover its held on with 4 screws so remove them and finally remove heater core and get some sealant to put around the new heater core this is a lot of work it took me about 12 hours to complete and get you a bucket because their is alot of nuts, bolts, clips so good luck

I just did mine last weekend and my my its a job I pulled the seats out to make it easier and if it has ac that will have to be discharged also. well start by removing your center console then your radio then take off your dash speaker covers off and your defroster covers off you will see a bunch of bolts that hold on your dash under all them covers so go ahead and remove all the bolts then move down under the dash and there is a bolt on both corners of the dash that goes into the lower panel remove them I also removed the bolts the hold the steering wheel up so it can lower down alittle to give you more room then ontop of your gauge cluster you will see two screws that holds the gauge cover on remove them and in the cover you also have headlight switch and hazzered and rear defroster make sure you unplug the harnesses to them then you will have to start unhooking all the other plugs and wiring that plugs into things on dash then get the dash out oh the way and go under hood and remove heater core hoses and you will need a specal tool to remove ac line then you will see one bolt next to the heater core hoses so go ahead and remove that then back to inside you will see the brackets that hold on heater Assembly onto the car and go ahead and remove them and pull whole assembly out and you will see the heater core cover its held on with 4 screws so remove them and finally remove heater core and get some sealant to put around the new heater core this is a lot of work it took me about 12 hours to complete and get you a bucket because their is alot of nuts, bolts, clips so good luck

If its anything like my 97 lancer you will need to follow these steps..

Disconnect the negative battery terminal.

Disconnect the top and bottom hoses from the heater core next to the firewall)

Pull off the steering wheel
Undo the steering wheel bolt.
Undo the 3 screws holding the steering wheel cover in place, unclick them and put to the side.
Undo the centre console
Undo the glove box - you'll need to manipulate the stops on the inside and let it fall to the floor before - undo the two bolts at the bottom.
Remove the Instrument panel, radio, radio frame.
Undo the single screw in the bottom of the casing surrounding the vents control, gently pop out the vent plate.
Undo the 4 screws holding the vents controls in place.
Remove the frames that are holding the vent controls in place (either side of the centre colsoles (or where they were)
Remove the two side vents (push down and pull back).
Remove the two bolts (either side) that are holding the dash up.
Remove the two bolts (bottom left corner, bottom right corner) that are holding the dash up.
Gently pull the dash up and forward to (making sure you don't pull any wires off there guides and place to the side).

Put the dash to the side (resting on the front seat)

The heater core should be sitting in the middle of the dash.

Remove the four bolts (two top, two bottom) and place to the side.

Pull the heater core back and move to the side to clear the holes in the firewall.

Manipulate the heater core to the side and move out through the gap in the dash and the cross bar (it is a tight squeeze but you can get it out)

Installation is the reverse of all the instructions.

when you have finished installing the heater core make sure you bleed the engine with coolant

Top up the radiator - keep the cap off, turn on the engine, turn on the heater on the heater to full, with the engine running keep topping up the radiator as the water runs through the new core...keep doing this until no more water goes through - this last step takes a while so be patient otherwise you will start to drive the car and will have an overheating engine very quickly...

you might have left a ground wire off somewhere hope that helps