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Removing blockage in heater core - 1996 Jeep Grand Cherokee

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Can't,you will have to replace.Here's a heater core replacement guide.

Posted on Dec 02, 2012

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Hello, the heater core is a small heat exchanger located inside the truck, similar to the radiator at the front of the truck. Coolant is circulated from the engine through the heater core and back to the engine. The heater fan blows fresh, outside air through the heater core; the air is heated and sent on to the interior of the truck. For Toyota Pick-ups/Land Cruiser/4Runner 1989-1996 check this reference repair guide...



Heater Core - REMOVAL & INSTALLATION
(see Figure 1)
  1. Drain the cooling system.
  2. Remove the heater unit assembly. Have a lot of towels handy for the leakage of coolant that may spill into your interior.
  3. Remove the fasteners securing the core to the unit, remove the plates and clamps. Pull upwards to remove the core from the unit.
To install:
  1. Inspect the core fins for any blockage. Using compressed air, clean them.
  2. Install the core into the unit placing the plates and clamps into position. Tighten the core screws.
  3. Install the heater unit into the vehicle.
  4. Fill the cooling system.
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Thanks

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Radiator leaking inside the car can it be changed


Yes it can be...just replace the heater core:

  1. Drain the cooling system.
  2. Remove the heater unit assembly. Have a lot of towels handy for the leakage of coolant that may spill into your interior.
  3. Remove the fasteners securing the core to the unit, remove the plates and clamps. Pull upwards to remove the core from the unit.
To install:
  1. Inspect the core fins for any blockage. Using compressed air, clean them.
  2. Install the core into the unit placing the plates and clamps into position. Tighten the core screws.
  3. Install the heater unit into the vehicle.
  4. Fill the cooling system


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might be a blend air door problem are the heater hoses the same temperature?

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i don't know realy if there is a fuse (though i doubt it) but issues with heatting may be this will help.

If the carpet under the heater core is damp, or if antifreeze vapor or steam is coming through the vents, the heater core is leaking.
Remove it and install a new unit (most radiator shops will not repair a leaking heater core.
If the air coming out of the heater vents isn't hot, the problem could stem from any of the following causes:
  • The thermostat is stuck open, previnting the engine coolant from warming enough to carry heat to the heater core. Replace the thermostat.
  • There is a blockage in the system, Preventing the flow of coolant through heater core. Feel both heater hoses the firewall. They should be hot.if one of them is cold, there is an obstruction in one of the hoses or in the heater core,or the heater control valve is shut. Detach the hoses and back flush the heater core with a water hose. If the heater core is clear but circulation is impeded, remove the two hoses and flush them out with a water hose.
  • If flushing fails to remove the blockage from the heater core, the coremust replaced.

Nov 27, 2009 | 2003 Ford F250 Super Duty Crew Cab

1 Answer

Heater not working (no heat)


If u have issues with heatting may be this will help.

1- If the carpet under the heater core is damp, or if antifreeze vapor or steam is coming through the vents, the heater core is leaking.Remove it and install a new unit (most radiator shops will not repair a leaking heater core.

1 - If the air coming out of the heater vents isn't hot, the problem could stem from any of the following causes:
  • The thermostat is stuck open, previnting the engine coolant from warming enough to carry heat to the heater core. Replace the thermostat.
  • There is a blockage in the system, Preventing the flow of coolant through heater core. Feel both heater hoses the firewall. They should be hot.if one of them is cold, there is an obstruction in one of the hoses or in the heater core,or the heater control valve is shut. Detach the hoses and back flush the heater core with a water hose. If the heater core is clear but circulation is impeded, remove the two hoses and flush them out with a water hose.
  • If flushing fails to remove the blockage from the heater core, the coremust replaced.

Nov 19, 2009 | 2003 Ford F250 Super Duty Crew Cab

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