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  #1  
Old 02-14-2016, 12:59 PM
Preston240sx Preston240sx is offline
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Default Heater question

Well like many ford ppl I am having the troubled no heat problem I've changed the thermostat , changed the antifreeze verified that the heater actuator is working , the heater flap actuates , burped the system couple times now ... If I leave the truck idle I have heat ... But as soon as I start driving it goes away ... I think it's the heater core but are they any other possibilities
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Old 02-14-2016, 07:17 PM
Ranger Danger 1998 Ranger Danger 1998 is offline
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Try flushing the heater core
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  #3  
Old 02-16-2016, 09:59 AM
4.0Rig 4.0Rig is offline
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Default Re: Heater question

No, Don't listen to Ranger Danger 1998

1. If the heater core was clogged it wouldn't be warm at idle.
2. The cold air you are feeling is because of the cold wind going into the radiator.
3. I would check for a stuck thermostat, vacuum leak, or possible blendor malfunction.

Flushing is not needed if it works at idle
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Old 02-16-2016, 04:49 PM
Preston240sx Preston240sx is offline
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Well kinda like warm at idle warmer ...I can drive have heat then... Will get cold in 15 sec turn blower off for a few sec have heat again for another15 sec
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  #5  
Old 02-16-2016, 06:47 PM
GSF1200S GSF1200S is offline
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Default Re: Heater question

Quote:
Originally Posted by Preston240sx View Post
Well kinda like warm at idle warmer ...I can drive have heat then... Will get cold in 15 sec turn blower off for a few sec have heat again for another15 sec
Mostly clogged heater core. Can move some coolant through it so it starts to warm. Blow air over it and like a radiator this cools off the coolant traveling through. However, since its mostly clogged, it cant generate much heat and once air blows over for awhile its no longer putting out heat. Makes sense in my mind.

Another possibility is a heater control valve that is clogged or stuck mostly shut, but it seems you addressed that.
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  #6  
Old 02-19-2016, 06:16 PM
Preston240sx Preston240sx is offline
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Flushed today real good with hot water and it's like night and day the heat came right back
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  #7  
Old 02-25-2016, 12:22 PM
Preston240sx Preston240sx is offline
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Well I let my mom take it back to Cleveland passed all the emission testing and everything but the damn heater started cooling down again I'm guessing I'm going to just swap the heater core
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  #8  
Old 02-25-2016, 12:28 PM
Ordinary Biker Ordinary Biker is offline
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Default Re: Heater question

Quote:
Originally Posted by Preston240sx View Post
Well I let my mom take it back to Cleveland passed all the emission testing and everything but the damn heater started cooling down again I'm guessing I'm going to just swap the heater core
I don't know what year your truck is, but if it's post 1998, I recommend doing everything you can to fix before going the swap route. Pulling the heater core is a major pain in the ass.
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  #9  
Old 02-25-2016, 12:42 PM
modelageek modelageek is offline
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Default Re: Heater question

Quote:
Originally Posted by Ordinary Biker View Post
I don't know what year your truck is, but if it's post 1998, I recommend doing everything you can to fix before going the swap route. Pulling the heater core is a major pain in the ass.
It's actually post 1994 that is a PITA. 1994 and earlier is a 20 minute job.
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2004 Ranger, Ext Cab, 2WD, 3.0, 5 speed , 4WABS, crank windows, no cruise, Edge 116k.(6/5,2014) (SOLD).
1999 Ford Ranger, Reg Cab, 2.5, 5 speed, 2WD, no AC, 150k (SOLD).
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  #10  
Old 02-25-2016, 12:44 PM
Preston240sx Preston240sx is offline
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I replaced the whole box assembly once before with one my buddy had laying around from a high mileage ranger I would have changed it then if I would of knew what I know now lol so won't take me that long couple hours to pull the dash back
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  #11  
Old 02-25-2016, 12:45 PM
modelageek modelageek is offline
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Default Re: Heater question

You first need to determine if the engine is getting to operating temp. About 190F
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2004 Ext Cab, 4WD, 4.0, Auto, 154k. (4.0 engine is out of a 2009 Ranger w/96k) ( as of 7/1/2017)

2004 Ranger, Ext Cab, 2WD, 3.0, 5 speed , 4WABS, crank windows, no cruise, Edge 116k.(6/5,2014) (SOLD).
1999 Ford Ranger, Reg Cab, 2.5, 5 speed, 2WD, no AC, 150k (SOLD).
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  #12  
Old 02-25-2016, 01:03 PM
Preston240sx Preston240sx is offline
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Yeah it's getting to temp I've flush and bleed the system about 20 times even bought one of those spill proof funnels that connects to the rad so u can watch it bubble out and visually see the thermostat open and suck antifreeze down and burp all of the system
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Old 02-25-2016, 01:07 PM
modelageek modelageek is offline
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Default Re: Heater question

Quote:
Originally Posted by Preston240sx View Post
Yeah it's getting to temp I've flush and bleed the system about 20 times even bought one of those spill proof funnels that connects to the rad so u can watch it bubble out and visually see the thermostat open and suck antifreeze down and burp all of the system
What year is it? You are positive it is getting to operating temp and staying there? Did you use a tstat with a bleeder on it?
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2004 Ext Cab, 4WD, 4.0, Auto, 154k. (4.0 engine is out of a 2009 Ranger w/96k) ( as of 7/1/2017)

2004 Ranger, Ext Cab, 2WD, 3.0, 5 speed , 4WABS, crank windows, no cruise, Edge 116k.(6/5,2014) (SOLD).
1999 Ford Ranger, Reg Cab, 2.5, 5 speed, 2WD, no AC, 150k (SOLD).
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  #14  
Old 02-25-2016, 01:08 PM
Preston240sx Preston240sx is offline
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It's a 2003 just did a rebuild on the engine changed thermostat and flushed heater core worked for short time had 190 degree thrmo
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  #15  
Old 02-25-2016, 01:17 PM
modelageek modelageek is offline
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Default Re: Heater question

Quote:
Originally Posted by Preston240sx View Post
It's a 2003 just did a rebuild on the engine changed thermostat and flushed heater core worked for short time had 190 degree thrmo
Sounds like an air bubble. Did you use a motorcraft tstat or at least one with a bleeder? I am assuming the heat worked fine before the rebuild.
Quote:
Originally Posted by Preston240sx View Post
It's a 2003 just did a rebuild on the engine changed thermostat and flushed heater core worked for short time had 190 degree thrmo
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2004 Ext Cab, 4WD, 4.0, Auto, 154k. (4.0 engine is out of a 2009 Ranger w/96k) ( as of 7/1/2017)

2004 Ranger, Ext Cab, 2WD, 3.0, 5 speed , 4WABS, crank windows, no cruise, Edge 116k.(6/5,2014) (SOLD).
1999 Ford Ranger, Reg Cab, 2.5, 5 speed, 2WD, no AC, 150k (SOLD).
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