My heaters isnt getting warm.

84blkstang

Member

Jun 4, 2003

544

1

18

Springfield MO

Oct 24, 2005

#1

• Oct 24, 2005

• #1

My heater isnt getting warm.

as the title says my heater doesnt get very warm, it has a new heatercore and a new heaterbox i know for a fact that there is nothing in it. When i first turn on the heater it is hot than after about 20 seconds it is luke warm and eventually gets cold, i dont know what the problem is the door is opening and closing, just fine. Would not having the restrictor in the heater core hose cause this? It has a 192* t-stat and runs 198-200 constantly.Any ideas are appreaciated.

 

84blkstang

Member

Jun 4, 2003

544

1

18

Springfield MO

Oct 24, 2005

#2

• Oct 24, 2005

• #2

I put a restrictor in which is a ....socket... dont worry about that. Anyways it didnt help it still doesnt blow hot it doesnt even blow luke warm. I checked my cooling system and it doesnt have any pressure on it, shouldnt it have pressure? would this affect my heater, the hoses are getting hot and it seems that you can feel the antifreeze running through the hoses. Would switching the hoses fix anything? I need a heater it is getting down in the 30's tonight and i dont feel like freezing my nads off.

 

Euphoric306

New Member

Apr 5, 2004

905

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0

Oct 24, 2005

#3

• Oct 24, 2005

• #3

all i can think of is maybe not enough coolant?

 

srothfuss

Last night I stabbed the same guy 7 times in a row

Oct 17, 2004

1,796

3

0

Woodward Ave.

Oct 24, 2005

#4

• Oct 24, 2005

• #4

You could have a couple air bubbles in the cooling system.. You should try to bleed the system of air before you spend any money.

 

iskwezm

10 Year Member

May 24, 2005

4,159

20

79

Rowland Heights,California

Oct 24, 2005

#5

• Oct 24, 2005

• #5

check your blend door operation,I think on your year there is a actuator that has a plastic arm and it gets brittle and breaks so cool air is always blowing out.

 

Black1987Stang

Active Member

Aug 22, 2004

1,422

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37

Jersey Shore

Oct 24, 2005

#6

• Oct 24, 2005

• #6

I say its the door too. Are both heater hoses hot also, they should be.

 

84blkstang

Member

Jun 4, 2003

544

1

18

Springfield MO

Oct 24, 2005

#7

• Oct 24, 2005

• #7

Both hoses are hot, the door works fine i got down there and operated it manually it was working, all the bubbles are out of the system it bad been bled numerous times. The coolant is full i just checked it yesterday. I am lost for ideas.

 

srothfuss

Last night I stabbed the same guy 7 times in a row

Oct 17, 2004

1,796

3

0

Woodward Ave.

Oct 24, 2005

#8

• Oct 24, 2005

• #8

If all of that stuff is working and you are not getting any heat out of the system that only leaves your Heater Core... You should check to see that the core is also heating up (with hot coolant passing through the core)

 

iskwezm

10 Year Member

May 24, 2005

4,159

20

79

Rowland Heights,California

Oct 24, 2005

#9

• Oct 24, 2005

• #9

srothfuss said:

If all of that stuff is working and you are not getting any heat out of the system that only leaves your Heater Core... You should check to see that the core is also heating up (with hot coolant passing through the core)

Click to expand...

yeah,theres no other possibilities.......make sure the knob isnt broken and it is turning the selector,also move the doors like you did,the deforst/vent door and the blend door just to make sure.Like it was said,if the core is plugged,you would have other problems

 

84blkstang

Member

Jun 4, 2003

544

1

18

Springfield MO

Oct 24, 2005

#10

• Oct 24, 2005

• #10

so how would i unplug the heatercore, the doors all work correctly i even moved them by hand. So how exactly would i check and make sure the heatercore is getting warm?

 

iskwezm

10 Year Member

May 24, 2005

4,159

20

79

Rowland Heights,California

Oct 25, 2005

#11

• Oct 25, 2005

• #11

both hoses should be hot,other then that,im stumped.Only other thing would be a stuck open t/stat.

 

84blkstang

Member

Jun 4, 2003

544

1

18

Springfield MO

Oct 26, 2005

#12

• Oct 26, 2005

• #12

Is it pretty common for a t-stat to stick, that would explain why it has no pressure, takes forever to warm up 25 minutes+, and has no heat.

 

T

tjm73

Founding Member

Aug 3, 2000

2,418

2

48

Rush, NY

Oct 26, 2005

#13

• Oct 26, 2005

• #13

The most common cause of a heater not blowing warm or hot air is a bad thermostat (even new t-stats can be bad). They cost like $12 bucks. I'd change that before I did anything else.

Why would you restrict coolant flow to the heater core? I can not figure out why you would do this? It would impede the normal operation of the heating system.

 

PuterAmI

Member

Mar 29, 2003

513

0

16

Madison, Alabama

Oct 26, 2005

#14

• Oct 26, 2005

• #14

tjm73 said:

Why would you restrict coolant flow to the heater core?

Click to expand...

The factory did this to lessen the pressure that the heater core sees to lower the rate of blown heater cores. As far as the temperature of the cabin air, it should not affect it.

 

jaymac

New Member

Feb 18, 2004

995

0

0

Northern Mass

Dec 6, 2005

#15

• Dec 6, 2005

• #15

OK, bringing this back from the dead:

My heat blows warm, but not hot. Last year it was just cold, and I backflushed the heater core, and it blew hot. This year it sucks again, but I already meagerly back-flushed it when changing the water pump and t-stat, and it's still only warm, and by the time it hits my face, it's cool. It's also a conertible, so that doesn't help.
I let the car each operating temp, but not enough to make the top rad. hose very hot.
Of the two heater core hoses, the one closest to the passenger side of the car was not as warm as the one closer to the drivers side.
Does this indicate that the heater core is plugged/dirty again?
When backflushing, which direction would I want teh water to flow, driver to passenger, or pass. to driver?

Thanks,
J

 

jaymac

New Member

Feb 18, 2004

995

0

0

Northern Mass

Dec 6, 2005

#16

• Dec 6, 2005

• #16

Forgot to subscribe...

 

jammer84_03

New Member

Nov 30, 2003

468

1

0

Dec 6, 2005

#17

• Dec 6, 2005

• #17

on my 4cyl it seemed like i was always taking the hoses off to flush it...i just a garden hose with a good amount of pressure and blast all the crap out....i did it twice in the same week and it worked fine after that...my 5.0 has yet to do it...not to jinx myself.

 

jaymac

New Member

Feb 18, 2004

995

0

0

Northern Mass

Dec 6, 2005

#18

• Dec 6, 2005

• #18

so which direction do I want to flush?
Garden Hose in the passenger-sidehose or the drivers sdie tube?

 

jammer84_03

New Member

Nov 30, 2003

468

1

0

Dec 6, 2005

#19

• Dec 6, 2005

• #19

i did it both ways a couple times....just to loosen it up. make sure you stand clear or sheild yourself or you will get wet....i learned from experience. try to get something that will completely block the hole that your spraying into. i just used a spraying attachment and it worked great

 

jammer84_03

New Member

Nov 30, 2003

468

1

0

Dec 6, 2005

#20

• Dec 6, 2005

• #20

i did it all the way back at the core itself....i didnt do it through the hosing at all....it would prob work though i guess. the firewall was simple for me....