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-   -   Heater Not Working (http://www.fordrangerforum.com/4-cylinder-tech/47137-heater.html)

lt1owner 11-18-2011 04:20 PM

Heater Not Working
 
Not sure whats going on. Its a 91 and the air blow out fine but the truck really doesnt heat up. My fan runs all the time and the air coming out is cold. Any ideas?

ZohanisBack 11-19-2011 12:18 AM

Re: Heater Not Working
 
Most likely a clogged heater core, especially if the heater stopped working slowly, a little at a time.

94mtx 11-19-2011 12:35 AM

Re: Heater Not Working
 
Does your temperature gauge operate normally?

djfllmn 11-19-2011 05:36 AM

Re: Heater Not Working
 
http://www.fordrangerforum.com/how-s...ing-guide.html

^^clicky

Rackster 11-19-2011 06:25 AM

Re: Heater Not Working
 
It could be a heater core, but it could be the thermostat. I haven't checked the link posted by dj, but it's probably a good place to start. Some simple things to check under the hood, checking hoses to see if the run warm, hot or cold. Keep your safety in mind if the engine is running or warmed up. Changing the thermostat in older Rangers is easier than more modern vehicles. Replacing mine meant located one blind bolt and the other one, heavily obscured by the AC tubing lines.

Good luck on the trouble shoot.

Kevin

lt1owner 11-23-2011 04:14 PM

Re: Heater Not Working
 
Well changed the thermostat. The truck still will not heat up, water pump was change not to long ago. Could the gauge be wrong? Also the prvious owner put stop leak in the radiator so somthing might be stuck in there

sheltonfilms 11-23-2011 05:26 PM

Re: Heater Not Working
 
Quote:

Originally Posted by lt1owner (Post 639432)
Well changed the thermostat. The truck still will not heat up, water pump was change not to long ago. Could the gauge be wrong? Also the prvious owner put stop leak in the radiator so somthing might be stuck in there

I've seen some stop leak clog a heater core before. Let your truck "warm up" and check both hoses on the heater core to see if only one is getting hot. Of course do this with your heat on full blast.

lt1owner 11-25-2011 01:20 PM

Re: Heater Not Working
 
Hoses do not get hot. Also The water pump was replaced last year because it was rotted out

sheltonfilms 11-25-2011 10:20 PM

Re: Heater Not Working
 
Quote:

Originally Posted by lt1owner (Post 641445)
Hoses do not get hot. Also The water pump was replaced last year because it was rotted out

Is your heater control valve stuck?

What engine is this again?

lt1owner 11-26-2011 10:16 AM

Re: Heater Not Working
 
Quote:

Originally Posted by sheltonfilms (Post 641989)
Is your heater control valve stuck?

What engine is this again?

2.3 where s the heater control valve how do you tell if its not working

sheltonfilms 11-26-2011 10:21 AM

Re: Heater Not Working
 
Should be the 4 port valve about 2 feet down the heater core lines. Plastic piece with a plastic vacuum line connected. Should see a vacuum actuator on it that pulls a rod that opens and closes the valves. You should be able to manually push the rod in and out.

Check for hot lines that lead up to this.

lt1owner 11-26-2011 11:10 AM

Re: Heater Not Working
 
Any pictures of this

lt1owner 11-26-2011 11:28 AM

Re: Heater Not Working
 
Ok we flushed the system and the heat is coming out. Going to do it again, temp gauge still isnt working though

94mtx 11-26-2011 12:28 PM

Re: Heater Not Working
 
My temp gauge doesn't rise at all in cool weather.

lt1owner 11-26-2011 01:56 PM

Re: Heater Not Working
 
Mine really doesnt work at all in any weather lol


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