Heater won't heat inside car.
#1652003
07/28/14 04:04 AM
07/28/14 04:04 AM
|
Joined: Aug 2004
Posts: 8,087
Elk Grove, Calif.
bigblock340power
OP
master
|
OP
master
Joined: Aug 2004
Posts: 8,087
Elk Grove, Calif.
|
I put it on defrost (fan on), temp switch on "heat", A/C switch off (engine heated up good, 200 ). Just cool air coming out the vents (vent doors are working correctly). If I turn off the fan for a bit, then turn it back on, I get a small burst of heat. Then it goes right back to blowing cold. My heater core is not leaking (no wet floor, no smell of coolant). I'm thinking the core is plugged up a little (not letting the coolant flow through enough). I did find this on you tube. http://www.youtube.com/watch?v=dcL_0TWeZJYSeemed to make sense to me, I'll give it a try. Just wondering if anyone out there has been down this road, tried this, and if I'm on the right "diagnostic" track or have suggestions before I do this? Thanks
|
|
|
Re: Heater won't heat inside car.
[Re: bigblock340power]
#1652004
07/28/14 07:30 AM
07/28/14 07:30 AM
|
Joined: Jan 2003
Posts: 21,072
Niles , Ohio
therocks
oh wait.but hey.lets see.oh yeah.
|
oh wait.but hey.lets see.oh yeah.
Joined: Jan 2003
Posts: 21,072
Niles , Ohio
|
Feel the hoses.They should both be pretty close in temp.My old dart would barely have any heat.Flushed the core and it didnt get any better.New core and it was so hot you had to turn the heater off.That and check that your heater valve is working right.IIRC it cable.Rocky
Chrysler Firepower
|
|
|
Re: Heater won't heat inside car.
[Re: therocks]
#1652005
07/28/14 10:38 AM
07/28/14 10:38 AM
|
Joined: Sep 2007
Posts: 14,889
up yours
Supercuda
About to go away
|
About to go away
Joined: Sep 2007
Posts: 14,889
up yours
|
Had this problem with my 72 Dart, had to pull both heater hoses and flushed the core with a garden hose. Took several iterations back and forth between the two nipples but once it ran clear both ways it worked great.
They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.
|
|
|
Re: Heater won't heat inside car.
[Re: Supercuda]
#1652006
07/28/14 11:05 AM
07/28/14 11:05 AM
|
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert
Circle Track
|
Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
|
The small burst of heat you felt for a moment tells you that it ain't a flow problem (at least in the heater core itself) & that one of the valves/servos etc that is vacuum or electrically controlled & either regulates the water or the air flow has a problem. with that resolved the heater core may need backflushing if it is partly plugged & not kicking out enough heat but for now work on the box inside the car (not my area) & get it squared away then see how much heat the system is providing
live every 24 hour block of time like it's your last day on earth
|
|
|
Re: Heater won't heat inside car.
[Re: bigblock340power]
#1652008
07/28/14 12:05 PM
07/28/14 12:05 PM
|
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert
Circle Track
|
Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
|
The core itself is flowing enough coolant cuz for an instant you felt the heat. I would leave the core alone for now & find what else in the heater box assy is either blocking the coolant flow (valve/servo) there or redirecting the airflow (blend door). I'm gathering that it happened pretty fast which would point to a vacuum servo but I am speculating a bit.
live every 24 hour block of time like it's your last day on earth
|
|
|
Re: Heater won't heat inside car.
[Re: RapidRobert]
#1652009
07/28/14 12:18 PM
07/28/14 12:18 PM
|
Joined: Aug 2004
Posts: 8,087
Elk Grove, Calif.
bigblock340power
OP
master
|
OP
master
Joined: Aug 2004
Posts: 8,087
Elk Grove, Calif.
|
Quote:
The core itself is flowing enough coolant cuz for an instant you felt the heat. I would leave the core alone for now & find what else in the heater box assy is either blocking the coolant flow (valve/servo) there or redirecting the airflow (blend door). I'm gathering that it happened pretty fast which would point to a vacuum servo but I am speculating a bit.
Just got back from the store, heated up the Jeep real good. I went back outside to feel my heater hoses under the hood. One was very hot, the other was warm, but much cooler that the first. Also, the cooler one made a "crunchy" sound, and felt "crunchy" inside the hose. WTF, I'm wondering what this is all about. Later when my Jeep cools off a bit I'm going to pull the hoses off and take a real good look at/in them.
|
|
|
Re: Heater won't heat inside car.
[Re: bigblock340power]
#1652010
07/28/14 12:23 PM
07/28/14 12:23 PM
|
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert
Circle Track
|
Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
|
The problem has temporarily fixed itself  . Yes it wouldn't hurt to back flush the heater hoses with a reasonable amt of water pressure but likely the real issue that is in the box itself is going to revert back to "no heat"
live every 24 hour block of time like it's your last day on earth
|
|
|
Re: Heater won't heat inside car.
[Re: RapidRobert]
#1652011
07/28/14 12:29 PM
07/28/14 12:29 PM
|
Joined: Aug 2004
Posts: 8,087
Elk Grove, Calif.
bigblock340power
OP
master
|
OP
master
Joined: Aug 2004
Posts: 8,087
Elk Grove, Calif.
|
Quote:
The problem has temporarily fixed itself . Yes it wouldn't hurt to back flush the heater hoses with a reasonable amt of water pressure but likely the real issue that is in the box itself is going to revert back to "no heat"
When you say the "box", what are you referring to? The box that the core is in? The heater box? If the core is flushed, and now has good flow, why would I not get heat?
|
|
|
Re: Heater won't heat inside car.
[Re: bigblock340power]
#1652012
07/28/14 01:59 PM
07/28/14 01:59 PM
|
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert
Circle Track
|
Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
|
Ok, if you have heat & can control it to your liking with the controls then all is good
live every 24 hour block of time like it's your last day on earth
|
|
|
Re: Heater won't heat inside car.
[Re: Supercuda]
#1652014
07/28/14 04:19 PM
07/28/14 04:19 PM
|
Joined: Aug 2004
Posts: 8,087
Elk Grove, Calif.
bigblock340power
OP
master
|
OP
master
Joined: Aug 2004
Posts: 8,087
Elk Grove, Calif.
|
Quote:
Quote:
I'm not talking about my Duster. I'm talking about my '98 Jeep.
Carp man, that makes a big difference, next time clarify what vehicle you are talking about. The Duster is a basic setup almost identical to my 72 Swinger, the Jeep is nothing like it. Hard too provide useful advice if we don't know what you are working on.
Didn't mean to anger you. That's why I put that info in my next threads.
|
|
|
Re: Heater won't heat inside car.
[Re: bigblock340power]
#1652015
07/28/14 05:03 PM
07/28/14 05:03 PM
|
Joined: Jan 2003
Posts: 6,591
Canton, Ohio
Sport440
master
|
master
Joined: Jan 2003
Posts: 6,591
Canton, Ohio
|
Dang it man, you need to clarify witch vehical your working on before you ask the question.  Yes the first step is to feel both heater core hoses to see if both are the same temp. Yours arte not and you feel crunchy sounds coming out the one end. Your definately in need of a back flush and maybe even a chemical flush. The back flush can remove the grit, the chemical flush can eat away at the rest of the rust that may be in there. You may have good enough results with just the back flush, but I recommend both. The chemical flush needs to circulate in the system for a few days to eat away at the rust. On some cars the Blend doors can be a problem. But your test of the heater core hoses and the crunch sounds says enough to where you should start at.
|
|
|
Re: Heater won't heat inside car.
[Re: Sport440]
#1652016
07/29/14 03:49 PM
07/29/14 03:49 PM
|
Joined: Aug 2004
Posts: 8,087
Elk Grove, Calif.
bigblock340power
OP
master
|
OP
master
Joined: Aug 2004
Posts: 8,087
Elk Grove, Calif.
|
First, I want to thank you all for your advise (no matter how misled I might have made you in the beginning (you know who you are!)). I back flushed my heater core through the lines in the engine compartment. Did this a bunch of times, back and forth, till the water ran clean, and steady both ways. Then I flushed the entire cooling system till it ran clean. Emptied the entire cooling system. Filled it up with new coolant, and water (as per the Chrysler specs). Started the engine, ran it up to temp. (thermostat opened, coolant dropped), added more coolant/water (in the over flow bottle too), put the cap back on (I'll check it again when she cools down). Jeep running, heater/defroster, and fan motor on. Lots of heat coming through now. Heater core lines are both hot, and hot. I think I've licked this one. Thanks again everyone!
|
|
|
Re: Heater won't heat inside car.
[Re: bigblock340power]
#1652019
07/29/14 11:57 PM
07/29/14 11:57 PM
|
Joined: Sep 2007
Posts: 14,889
up yours
Supercuda
About to go away
|
About to go away
Joined: Sep 2007
Posts: 14,889
up yours
|
Guess mind reading ain't my forte either.
They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.
|
|
|
Re: Heater won't heat inside car.
[Re: DPelletier]
#1652021
07/31/14 06:09 AM
07/31/14 06:09 AM
|
Joined: Aug 2004
Posts: 8,087
Elk Grove, Calif.
bigblock340power
OP
master
|
OP
master
Joined: Aug 2004
Posts: 8,087
Elk Grove, Calif.
|
Quote:
Quote:
I assumed it was the Duster.
No, it was my '98 Jeep GC. So, be careful of that word "assume". I assume, you know the old saying!? 
Everyone, have a great day.
A reasonable assumption seeing as how the thread said "car", given your username and the big honking pic of an A body below it.... I would call a GC an SUV or truck myself... 
Dave
Your correct, but as you read down the tread you see where I corrected the misnomer fairly early on. Damn, I'm getting more grief over this than help. I'm just glad I've fixed the problem.
Life goes on people! 
|
|
|
|
|
