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Take the hoses of and run water backwards & forward through it.

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Q: How to clean a clooged auto heater core?
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Related questions

How do you clean a heater core?

You don't clean a heater core. Once it's clogged, you cannot clean it out successfully. You need to replace it instead.


How do you repair a heater core on a 1994 Aerostar 30L V6 van?

The heater core will have to be replace, it is not hard to do and the Heater Core is about $35 at the auto parts store. Good Luck


If radiator sealer blocked the heater core can it be unclogged?

The heater core can be flushed out and hopefully be unclogged. A water hose can be hooked to the heater core hoses, and water flushed through to clean the core out.


Why do you get steam when the auto AC is on?

The heater core is leaking coolant.


How much does a heater core cost?

There are many online shops that sell heater core. Amazon.com is one of online shop that sells heater core for any kind of auto car. You can visit www.amazon.com


Does it hurt to swap inlet and outlet hoses on heater core in a 2000 Chevy blazer?

No it will not, it will just back flush the heater core and clean it out.


New Radiator new heater core replaced but one month later heater core blows out antifreeze into vents leading to car Auto part where heater core was purchased says it's something electrical?

check radiator cap for proper pressure first.then check clamps at heater core


Where can one purchase a heater core replacement?

One can purchase a heater core replacement from a number of online retailers. They are available to buy from eBay, Auto Parts Warehouse, AutoZone and JC Whitney.


How do you change heater core in a 97 f150 w air auto 4.6l?

the heater core is located behind the dash on the passenger side of the cab. much of the dash has to be removed and shifted to get to the box that houses the heater core. the hoses that supply coolant to the heater core must be remove via the engine bay. it is somewhat of a lengthy process, but can be done with patience and time.


How do you disassemble the heater core in a 1992 Buick Skylark?

Disconnect the negative battery cable.Drain the engine coolant into a clean container for reuse.Raise and safely support the vehicle.Remove the rear lateral transaxle strut mount, if necessary.Remove the drain tube and disconnect the heater hoses from the core tubes, lower the vehicle.Remove the sound insulators, console extensions and/or steering column filler, as required.Remove the floor console outlet ductwork and hoses.Remove the heater core cover.Remove the heater core mounting clamps and remove the heater core.This information was taken from chiltons auto repair manual. So good luck and hope it works out.


Heater core 91 prelude?

Search for part number 398291. Or check out this site: http://autoparts.thecarconnection.com/auto-part/176813-honda-prelude-aftermarket-rr398291-heater-core Good luck!


Why would there be no coolant flow from engine to heater core on 2000 Elantra if there are no obstructions?

its happen because heater core have too much durt insaide and you can clean it with some blowing thing or replace