Question about 2001 Jeep Grand Cherokee
Probly need a new heater core--get a haynes manual or library sec629 has pro mechanics series--if u get new one test evaporator and blower motor also to save labor
Posted on Jan 16, 2014
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Posted on Jan 02, 2017
Make sure the fan control module has not failed. They tend to do this on Chrysler products. Mine did on my '03 Jeep GC at about 48k miles..
Posted on Dec 18, 2009
Since your blower is working and it is a heat issue,thats where we'll
start,First thing is have you checked the coolant level in the radiator when
engine is cold,make sure it is filled to top,next verify you have coolant in
reserve ,Start your van and get it up to normal operation temperature,If your
heat gauge on the dash works correctly it should be 190 degrees,Now lift the
hood and locate the two heater hoses going into the heater assembly at the fire
wall,Both hoses should be hot to hold on to,if both are hot and no heat inside
your problem will be the blend air door in heater assembly.
if neither hose is that hot you need to replace the thermostat in the engine to get it up to 195 degrees.
if one hose is hot and one is luke warm then the heater core is blocked and to blame. hope this helps you.
Posted on Jan 12, 2010
SOURCE: I HAVE A 2002 GRAND CHEROKEE LINITED WITH THE V8, I HAVE TOOK THE HEATER HOSES OFF THE ENGINE AND FLUSHED THE HEATER CORE OUT UNTILL ONLY CLEAR WATER COME THREW IT. I HAVE CUT THE HEATER BOX OUT TO G
i think its blocked with rust where engine has been used with no antifreeze causing corrosion ,check their is no valve thats electricaly operated to shut off water supply and if it doesnt have one then block off bottom hose with mulgrips and use a piece of spare hose on the top pipe and a funnel then mix some 50% caustic soloution and pour into funnel till it shows on the funnel then leave overnight it will either kill or cure one or the other ,old fleet fitters trick so it will not be recomended by the elite pundits but it can work ,make sure you flush well before refitting and if you used mullies on bottom pipe then make sure you remove it to flush it all out ,Try with just plain water first and if it works drain some water out and add at least 3 litres of pure eythlene glycol antifreeze .this will keep system clean and it will not freeze up in the cold .
Posted on Nov 16, 2011
SOURCE: I have a 4cyl 1999
The key is the heater hoses. The top hose is the inlet for the heater core and the bottom is the return line. If the bottom hose is not hot, there is little flow through the heater core. It does not have to be completely clogged to reduce the heat output. The core needs to be flushed multiple times IN BOTH DIRECTIONS through the heater hoses. If this does not restore the heat, try a commercial/radiator flush. Many people have had alot of success by filling the core, through the heater hoses, with a CLR type product and letting it sit for 10-15 minutes to remove scale followed by a thorough flush.
Posted on Dec 01, 2011
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