Change Heater Core on 1998 Grand Cherokee Laredo?

Answer 1

Its a tough job. You have to remove the dash panel, including the steering wheel and steering column and then remove the plenum box which involve evacuating the refrigerant system and draining the radiator. Once you get the heater box out, replacing the heater core will take about 10min and then you have to put it all back together and recharge the AC and fill the radiator.

If you are seeing leak problems with the system, you will have to go through this process. If the problem is lack of heat and/or AC control, the problem is more likely the blend door. This is a common fail on the Cherokee. You can get diagnostic information and an inexpensive fix on the HeaterTreater web site. Follow my user name to my Bio Page for a pointer or just search heatertreater on any search engine. ford4me

Answer 2

Changing the heater core requires complete removal of the dash panel and plenum box. To do this you have to remove the steering wheel, steering column, evacuate and recharge the refrigerant system and drain the radiator. I would only consider changing the heater core if it is physically leaking into the passenger compartment. If the problem is heat transfer to the HVAC system only, the problem is more likely with the blend doors. Check heatertreater.net for pictures and diagnostic information.

Answer 3

on the passenger side of the grand Cherokee years 1999-2004, there will be a box under the glove box above where the passenger would set their feet, you have to remove that box, and depending on what type of servicing you are doing, you must start by taking that box off, all you will need is a socket set and a Phillips screwdriver. Make sure you take a picture if you cannot remember where each piece is located if you aren't used to doing work on your car. It can get confusing