Heater Core replacement

If it's clogged it can be cleared with the use of Garden hose pump. The water has to be turn into the heater hose line and then water has to be removed out via the pump.

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For complete step by step procedure, refer heater core flushing and other help links mentioned below.

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Click the link below: -----

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How to Flush Heater Core?
http://schematicsdiagram.blogspot.com/2011/12/how-to-flush-heater-core.html
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Also check these link too:---

HEATER CORE REPLACEMENT, HEATER CORE REMOVAL, TROUBLESHOOT HEATER CORE, FLUSH HEATER CORE,
http://alltypesofpartsreplacing.blogspot.com/2012/12/heater-core-replacement-heater-core.html

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These will help.
Thanks.

I would make sure the core is the problem. You may have a heater control valve that cuts off flow to the core by vac. or a blend door that cuts off air flow thru the core.
You will need a shop manual to replace the core. The dash and console have to come out, along with discharging the ac.

Hi Lerverne,here' a link on your rear heater core. Repair Guides Auxiliary Heating Air Conditioning Heater Core AutoZone com Here's a link to a new rear heater core. Spectra Premium Heater Core

Either your heater core is plugged up or your line to the core is restricted. Do a complete reverse rad flush with a radiator cleaning solution and try it. If that doesn't work you'll need a new heater core.

Inspect/Replace If it is necessary to remove the heater assembly, the cooling system must be drained before removing the heater core.
When a heater core leaks, a new heater core is installed or the old one repaired.
Heater Housing

• The heater housing is usually under the dash and must be removed to gain access to the heater core.
• Procedures for replacing the heater core vary with the year, make, and model of car. It threfore necessary to consult the manufacturer's repair manuals for the proper procedure for replacement.

The heater housing is disassembled to get to the heater core. Heater Core

• Remove the access panels(s) or the split heater/air conditioning case to gain acess to the heater core.
• Remove the heater coolant hoses.
• Remove the cable and/or vacuum control lines (if equipped).
• Remove the heater core securing brackets and/or clamps.
• Lift the core from the case. Do not use force. Take care not to damage the fins of the heater core when removing.
• To reinstall the heater core, reverse the removal steps.

When the heater core leaks and must be repaired or replaced, it is a very difficult and time-consuming job primarily because of the core's location deep within the firewall of the car. For this reason always leak test a replacement heater core before installation.

If it is necessary to remove the heater assembly, the cooling system must be drained before removing the heater core.
When a heater core leaks, a new heater core is installed or the old one repaired.
Heater Housing

• The heater housing is usually under the dash and must be removed to gain access to the heater core.
• Procedures for replacing the heater core vary with the year, make, and model of car. It threfore necessary to consult the manufacturer's repair manuals for the proper procedure for replacement.

The heater housing is disassembled to get to the heater core. Heater Core

• Remove the access panels(s) or the split heater/air conditioning case to gain acess to the heater core.
• Remove the heater coolant hoses.
• Remove the cable and/or vacuum control lines (if equipped).
• Remove the heater core securing brackets and/or clamps.
• Lift the core from the case. Do not use force. Take care not to damage the fins of the heater core when removing.
• To reinstall the heater core, reverse the removal steps.

When the heater core leaks and must be repaired or replaced, it is a very difficult and time-consuming job primarily because of the core's location deep within the firewall of the car. For this reason always leak test a replacement heater core before installation.

I suggest check the Jeep XJ Cherokee Repair Manual (Section 24-Heating-and-Air-Conditioning).

Hope this helped (remember rated this) Good luck.

you need to change heater core(check couplings and lines before!!!) or if you don`t wan`t to buy another heater core you can bypass it just put hard line between lines but you not going have hot air inside the car if you bypass it

When I drive my 2000 Jeep Grand Cherokee I can hear water. I was told to blow out the lines of the heater core with a compressor. Where is the heater core located?

REMOVAL

1. Remove the heater-A/C unit from the vehicle. "Housing Assembly HVAC : Service and Repair" See: Heating and Air Conditioning\Housing Assembly HVAC\Service and Repair
2. Remove the heater core retaining screws.
3. Pull the heater core straight out of the housing.

INSTALLATION

1. Install the heater core into the housing.
2. Position the clips over the heater core tubes. Install and tighten the screws.
3. Install the heater-A/C unit into the vehicle. Under "Housing Assembly HVAC : Service and Repair" See: Heating and Air Conditioning\Housing Assembly HVAC\Service and Repair