I just flushed heating coil again and flows great! is it the heating coil shot?
i had the same problem and I had a broken wire on the fan I replaced it and
heater started working again. Don,t no for sure if this was the reason. By the way I started having this problem after put a new radiator on.
If the heater core flows good in both directions, then I doubt its clogged. After getting up to operating temperature, are both heater hoses fairly hot where the enter the firewall/heater core? If one is significantly colder, that indicates a clogged heater core.
You may have a "blend door" that is stuck open. The blend door is in the heater core housing and that allows fresh (cold) air to mix with the heated air passing thru the heater core.
The blend door is usually moved open/shut by an actuator. Sometimes this actuator goes bad.
In less common cases, the water pump impeller/bearings may be bad, and not putting out proper flow. Just some additional things to check. Hope this helps.
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Check to make sure vents are not clogged,below window by wipers check that and vents from dash going down,If not plugged then probably your heater core or heater blower motor may be shot or weak,you need a Haynes manual to check these if you are not familiar with where these are located at.Haynes manuals can be bought at most auto parts stores
SOURCE: 2004 Jeep wrangler 4.0 - 6cyl overheating
I had the same overheating problem in my jeep ! My problem was finaly found out to be the clutch in my fan its a different kind of clutch system it work as this. When your jeep gets warmer the tighter your fan clutch gets .While cool your fan moves slowly. now to test your clutch just warm up your jeep and rev it up a bit if your fan dose not pick up speed then it is sliping.What will come out of this is that you fan will the seez and run full all the time. if you jeep dose not overheat wile moving then it is not your thermo stat period.
SOURCE: 2000 Cherokee not warm
Aside from flushing the radiator and heater core andreplacing your hoses, did you happen to replace your thermostat. Sounds to me like that's your problem if everything else seems to be in order. If you change the thermostat and still have no heat, you might check your vacuum lines running to the back of your heater controls inside your dash. That's really the only other thing that I believe could be causing your lack of heat.
Hope this helps! Have a great day and try to stay warm!
SOURCE: 2002 jeep liberty has very
sounds like a head gasket problem. A minor leak there will pump compression into coolant and force it out of heater core. Any unusual steaming from tail pipe? Also: if radiator was flushed "in car" sometimes debris does not come out. Try flushing with it out of the vehicle. Jeep radiators are notoriously small for their application if not at at least 90% they will not work correctly.I'd look at the hg first though otherwise, your symptoms seem to be contradictory.
SOURCE: The heat in my 1992 Jeep Wangler is not working.
Hi!
It
appears we have an Air lock scenario and you will need to perform a
system Bleed.
Park
the vehicle on level ground, when cold remove coolant filler cap,
start engine and leave to idle, turn heater on full and blower to
max. When engine reaches operating temperature watch and listen near
coolant filler, keep clear as gurgling and hopefully a boil over
should occur. Top up with very warm coolant and wait as it may do it
again.
Check
for heat inside vehicle if warm replace coolant cap but keep an eye
on temperature gauge as the ~Air lock may have moved on from heater
matrix/core so proceedure needs to be carried out again from COLD.
If
persistent boil ups/over attention must made in the cylinder head
or
gasket area, or possibly water pump?
Please
press the Blue button to appraise my FREE Efforts, Thank You!
Paul
'W' U.K.
SOURCE: 1999 jeep wrangler very little heat
YOUR RADIATOR HAS TRAPPED AIR IN IT AND NEEDS T BE "BURPED".
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