Question about Chevrolet Monte Carlo

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Do i need to disconnect a/c evapator and lose my freon to replace heater core?

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Usually the answer is no, but access is the issue. If you do need to discharge the A/C, take it to a shop and have them recover the refrigerant. And Plan on new receiver dryer and new oil in A/C.

Posted on Oct 01, 2010

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  • Master
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Good Evening, it depends on what kind of vehicle it is, however they are both seperate units and normally almost all can be removed without evacuating the air conditioning system.

Posted on Oct 01, 2010

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2 Answers

Why must i discharge the air conditioning refridgerant prior to removal of the heater core on a 2003 c230 mercedes 1.8l coupe.


The reason in why you must evacuate the a/c system with an a/c machine before you can remove the heater core is because the evaporator is located inside of the heater core box assembly. So before the heater core box assembly can be removed the a/c system must be evacuated then you can disconnect the a/c lines that go through the firewall to the evaporator.

Jul 01, 2015 | 2004 Mercedes-Benz C230 Kompressor

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Directions flush heater core


cud hav internal engine leak or its losing wile drivn--they can do a leak test at a rad shop--heater core may be failn-if it does test the blower motor and ac evap too

Oct 11, 2013 | 2002 Audi TT

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What's your problem?I have a 1996 Chevrolet Suburban. The AC is blowing out hot air. I have had the truck for 6 years, every Summer its the same thing. The ac does not get cold, I take it to the m


To clarify - - if the truck has rear and heat, you have two heater cores and two evaporator cores. The evap cores carry the freon.
If the leak is in the evap core in the front, the price is probably right.

Jul 06, 2012 | 1999 Chevrolet Suburban

1 Answer

Can you show me a video on how to put in heater core for 1996 Nissan Maximal


What i have is the steps on how to put or replace the heater core. hope this will help you.



the core is located behind the steering column, meaning you mainly need to remove that. On more recent cars, the whole dashboard needs removal.

Older Models

Shut off power to the Maxima, especially the air bag system. Disconnect the negative battery terminal and wait at least 3 minutes for the air bag to lose energy.

rain the engine coolant from the cooling system. Use a clean container if you plan on reusing the coolant.

Disconnect the heater hoses from the heater unit inside the engine compartment. Remove the blower and cooling unit from the interior and then the steering member assembly. Remove the heater unit and the core from the unit.

Install the new core into the heater unit and reconnect the unit in the car. Connect the steering member, cooling unit and heater hoses.Refill the cooling system and connect the battery cable.

Newer Models

Unplug the negative battery terminal. Wait 3 minutes for the air bag system to lose power. Drain the engine coolant into a clean container.

Disengage the air bags from both sides of the car. Remove driver's bag by removing the steering wheel's lower and side lids and the Torx bolts from the wheel sides. Disconnect the passenger bag electrical connector from inside the glove box.

Disassemble the instrument panel. Remove all components and screws from the panel, then have an assistant help lift and remove the panel itself.

Disconnect the following heater, defroster and ventilation ducts on the rear and sides. Remove the heater housing and the heater core from the housing.

Reinstall the heater housing with the new core installed. Replace all ducts, the instrument panel and the air bags.

fill the cooling system and reconnect the battery cable. Let the Maxima

Dec 04, 2010 | Nissan Maxima Cars & Trucks

1 Answer

Heater core replacement, 2000 Jeep Grand Cherokee Laredo. Why do I have to evacuate the freon?


you need to evacuate the freon because in order to get the heater core out you also need to remove the evaporator for the AC. (great design huh?)

Nov 02, 2010 | 2000 Jeep Grand Cherokee

2 Answers

Heatercore ,windsheil fogs up,losing antifreeze.


You have a leak in the heater core and it needs to be replaced.

Dec 08, 2009 | 1995 Dodge Intrepid

1 Answer

Need diegram on replacing heatercore 99 dokota


Good luck on your heater core...I promise it's utter hell. You will need to disconnect the battery, disassemble the right side of the dash board, drain the freon, take the fan cover off, take out the evaporater, and after that you will be able to get to the heater core. HAVE IT CHECKED FOR LEAKS!! The reasssemble the opposite.
Good luck it is time consumbing, around 4 hours.

Oct 09, 2009 | 1999 Dodge Dakota

1 Answer

1999 dodge durango heater core


It's a big job. Drain the coolant down, recover the freon in the ac system and disconnect the lines and heater hoses. Lower the steering column, remove the instrument panel assembly, remove the heater housing. Split the case halves on the housing and there you are. Usually around 500 to 700 dollars at a dealership.

May 29, 2009 | 1999 Dodge Durango

1 Answer

Blend Door on 98 Ford Explorer


the blend door is roughly in the middle of air distribution Plenum assembly between the heater core and the AC evap core, it either directs air through the heater core or the AC evap core or mixes air from both.

Jan 14, 2009 | 1998 Ford Explorer

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