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Ford Ranger Heater Not Working

Category Cars
Ford Ranger
If your truck's heater is not working, your defroster usually doesn't work either. This guide is about Ford ranger heater not working.
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Ask a QuestionHere are the questions asked by community members. Read on to see the answers provided by the ThriftyFun community or ask a new question.

By 1 found this helpful
January 10, 2017

My 2007 Ford Ranger 4wheel drive V-6 only blowes cold air.

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February 18, 20170 found this helpful

Heater blowing cold air

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By 3 found this helpful
October 7, 2016

I have a 2009 Ford Ranger 2.3 liter 4 cyl 5-speed manual and the temperature control stopped working. The A/C and defrost work fine, but blow only cold air. The vent and heat are lukewarm to lukecool at best. There is no change when the knob is turned to max cold (blue) or max heat (red). Any thoughts on how to fix this problem?

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December 11, 20160 found this helpful

I have a 1998 ford ranger that had the same problem. The truck ran cold and the heater was cold. It started blowing luke warm a while back then would only blow cold. After checking everything and finding no solution I removed the water pump and found the pump blades worn completely down. the water pump wasn't pumping enough water thru the heater core to provide heat. It also wasn't pumping water thru the thermostat to the heat sensors so I was getting a low temp reading on the gauge. I replaced the water pump and also put in a new thermostat and temp sensors and that solved my problem. My heat is now good and warm and my engine temp reads a good steady temp. Logic would tell you that a faulty water pump would cause overheating problems but that wasn't the case on my truck. The water pump seals were good and the shaft bearings were good so there was no indication of a problem with the water pump. Over time I guess the coolant had eroded the pump blades down to nothing and I wasn't aware until I removed the pump. Good luck with your issue, I hope this helps.

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By 1 found this helpful
December 17, 2016

I can't change the heater settings on my '98 Ford Ranger.

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December 30, 20160 found this helpful

From my research it seems that your heater blend door is broken and you need a new heater evaporation box from Ford.

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By 0 found this helpful
December 2, 2010

My 2004 Ford Ranger heating doesn't work. The coil does not leak. I have opened and closes the damper door manually. I have opened and closed the bypass valve under the hood, at different times while opening and closing the damper door. It still doesn't work. Any suggestions?

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By firedog658 from Cleveland, GA

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March 20, 20170 found this helpful

behind the glove box is a black box that controls the flap. the two front ones are easy to get to, but the back one you need small hands. take a 10 mm wrench

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December 26, 20140 found this helpful

I replaced the unit under the hood and the button on dash and the heater still does not work.

By Mike from Diamond Bar, CA

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March 20, 20170 found this helpful

i was told that behind the glove box of my 2004 is a little black box with three screws that controls the heat. i check the hoses and i got hot water circulating., i got no vacuum line leaks, so that's my next step. no hurry since spring is here

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December 1, 20140 found this helpful

My truck heater will only blow cold air. Why?

By Martin S from Reno, NV

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December 6, 20160 found this helpful

On a 1991 Ford Ranger 3.0 the heater blows out cold air works on all three speeds I did notice that the heater core 22 hoses going into it are both cold I flush the heater core out it is running good.

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By 0 found this helpful
December 22, 2009

Please help, it's getting cold. The heater is not working in my 1999 Ford Ranger. The heater core is getting hot and air is coming through the vents. I can't locate the transfer door between the heater core and the evaporator core. Where is the actuator? Is it vacuum or electric?

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By Mike from Millington, TN

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March 9, 20170 found this helpful

i have heat but the door won't open to let the heat flow any suggestions?

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February 9, 20151 found this helpful

I own a 2008 Ford Ranger and can't get any heat. I changed the thermostat and the control knob and still no heat.

By WF

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November 4, 20110 found this helpful

My 1996 Ford Ranger heater will not blow hot air. Any suggestions?

By AR

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November 5, 20110 found this helpful

I would check the thermostat. You should always replace the thermostat when changing the coolant with a high temperature thermostat. Sometimes people have the coolant changed and replace the thermostat with a low temperature unit and that will blow cooler air. My car was blowing cooler air but the reason was my coolant was down little over a half a gallon.

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By 0 found this helpful
November 21, 2016

I have a 2001 Ford Ranger 4.0 ,4wd. I replaced the 10 amp heater fuse, blower motor relay, blower motor, and three way dash switch. I also swapped around the under the hood relays. Still nothing? I used a test light and it seems there is no power to anything (relays, blower motor, dash switch). Also my air bag light is on. I was told the seat belt relay was bad a month ago, but then I replaced the fuse and the air bag light went out. This happened many times and now the fan is not working at all after replacing all of the parts listed above.

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November 21, 20161 found this helpful

There are a couple of Ranger Forums that may be helpful. I've gone to them in the past and sometimes gleaned helpful info that helped me fix my 2008 Ford Ranger. One of them is ranger-forums.com. Also, there is 1aauto.com. 1aauto sells parts but they also have a "online chat" option where you might find some answers.

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By 0 found this helpful
October 8, 2016

Any one have any ideas why my heat will not work and what I mean is sometimes the air will blow and sometimes it won't. It's a Ranger XLT.

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December 20, 20160 found this helpful

I have the same problem on my 91 ranger XLT have not been able to get it. Work last year fine.

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By 0 found this helpful
September 13, 2015

I own a 2005 Ford ranger. How do I tell which is screwed up, the temp control switch or the blend door actuator?

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September 17, 20150 found this helpful

Have you checked the fuses? Mine are on the firewall on the driver's side. Easy to access.

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By 0 found this helpful
April 9, 2014

I have a '97 Ford Ranger truck. The blower works on high, but doesn't blow heat. The a/c works fine. I replaced the thermostat; that didn't work. Any ideas would be a help. Thank you.

By Jason

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October 26, 20140 found this helpful

It sounds like your heater core is clogged.. It's usually very expensive and time consuming to repair a clogged heater core. It usually involves taking your dashboard off on the passenger side to get to the core... I would recommend getting a flush kit from your auto parts store (I usually get two) and where the hoses go to the heater core in the engine compartment, hook the flush kit up to both hoses coming from the heater core and flush it in both directions.

I usually try to hook my hose up to hot water to help break any gunk loose. You might also try pouring some coolant flush in prior and let sit to break up any gunk before flushing.

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January 12, 20140 found this helpful

How do I back flush a heater core for 99 Ford Ranger? Can I do damage, if I do it wrong?

By Mike H. from Boston, MA

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October 26, 20141 found this helpful

What I normally do is buy two flush kits that you can normally get at walmart or you auto parts store. I hook the "T" connector to both hoses going to the heater core in the engine compartment. I personally try to hook my Jose up to a hot water source, I also like to pour coolant flush into the core prior to flushing to help break up any gunk.

Also you want to punch off the hose on opposite side of "T" connector to force the water towards the heater core and not the toward the engine as this can mess up the thermostat and make sure that the second hose coming from core can dump into a container and is not attached towards motor or the gunk that will break free can go into motor and cause damage.

I've done this a hundred times and have saved tons of money from having to replace heater core. Total cost with new antifreeze and two flush kits should be around $30 rather than $400 for new heater core and $1500 for labor. It's definitely worth doing. You can also find videos YouTube and other sources (some prefer to use compressed air rather than water).

The only time you really need to replace heater core, is if it is leaking which in this case, your passenger side floor will most likely be wet).

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By 0 found this helpful
December 14, 2013

The block won't even heat up. I replaced the thermostat today and the old one was in pieces so I thought that was it but it still won't heat up. Any advice?

By Greg

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February 10, 20140 found this helpful

Mine has had so many heater problem, when I had that particular issue I for me it was as simple as a flush ... But a intense long flush. I got a hose and filled up a (Metal bucket) then boiled water wile that was cookin I opened the drain valve and radiator cap. Let it drain and filled up with distilled water and drained again and again.

Slightly closed drain to just a slow stream and poured in the boiling water turned on the car and let cycle. But remember the drain is still open so keep adding water when it starts to get really clean looking open can of sea foam pour 1/3 of bottle in radiator close drain and cap let cycle after a few min open drain (be careful under pressure and very hot) once drain valve is open for a few seconds, enough pressure should be gone to open cap add more regular distilled water till clean water continuously drains.

Shut drain cap and fill up radiator but add a little more of that sea foam to it and drive car around for 15-20 alternating speeds to make motor work and cycle have heater on high fan and heat throughout entire proses then check fluid level it should be low top off and wait 2 days and re-do proses u will prolly think this is re-donkulace Lol, but it really made mine work great once the car heats up.

You will need:

A can of sea foam

Found at most auto parts stores it's a white bottle red writing.

Remember 1/3 in with boiling water then drive hard or so! Then add another splash when filling coolant put remainder in gas tank I use it every other fill up :;

At least 4 gallons of distilled water depending on times you plan to flush and rinse

And finally what ever choice of coolant you choose.

Now my new problem is my thermo gauge never goes above cold line and also cold air is coming from some where in high speeds heater is amazing till I hit about 65 and up then cold It's like it can't keep up with the air entering system. Well it's up to you to try it or not but no mater my tips or anyone else do your home work on every thing you are informed about hope u get if fixed!

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October 2, 20120 found this helpful

The AC will not shut off to get heat in my Ranger.

By D.B

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October 5, 20120 found this helpful

Have it checked or do it yourself, to see if something is wrong with the compressor. Also have them check the thermostat. Hope this helps.

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January 4, 20120 found this helpful

I have only high speed on my Ford Ranger heater fan. How can I fix this?

By Serge

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January 6, 20120 found this helpful

Hi, my car did the same thing. It is the heat resistor fan speed control switch. t is usually found near the firewall on the passenger side. The part can be bought at most any auto parts place, cost about $35.Google your vehicle/heat resistor fan speed control switch and you should be taken to a page showing you where it is located. Good luck, Kathy

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By 0 found this helpful
January 3, 2011

I have a '98 Ford Ranger 4cyl with a temperature control problem. The temperature control knob does nothing with regard to changing the air temperature coming into the cab. I just put a new heater control valve in and it has vacuum to the valve. The blend door is changing to the selected outlet AC/floor/defrost, etc. I only get AC when in the max position, heat everywhere else. Any ideas?

By Frankieh from New Bern, NC

Answer Was this helpful? Yes
January 5, 20110 found this helpful

If you Google a phrase like "car repair forum", you might have a better time of finding people who can help you. That's where I got some good advice about a strange noise my car was making, and found out that it was the fuel pump failing.

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By 0 found this helpful
April 13, 2010

I have a '98 Ford Ranger. I am having problems with the temperature control of the heater system. The heat is stuck on. I have heard and read of problems with the heat and a/c blend door. I don't think this is my problem because it seems like I had shorted out my trailer lights and then the heat control problem started. Is there a relay involved in this that could have burnt out? I have already replaced the blower motor resistor on a recommendation of an auto parts store employee.

By Rodger from Fruita, CO

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April 13, 20100 found this helpful

EMAIL: sales AT diyrepairmanuals.com

good luck.

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February 9, 20150 found this helpful

The heat and A/C on my 2002 Ford Ranger Edge works fine, but the fan does not blow. How can I fix this?

By Gerry D

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January 25, 20150 found this helpful

I have a 1999 Ford Ranger. How do I fix the heater blower?

By Tina

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January 8, 20150 found this helpful

My 2008 Ford Ranger heater will not blow heat on the floor. Do you know what this could be or how it can be fixed?

By Carolyn

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November 20, 20140 found this helpful

Does anyone know why it would not work? If so please let me know, it is getting cold and colder. Thank you.

By Ernie

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September 18, 20140 found this helpful

On my 2004 Ford Ranger XLT the a/c won't change to heat.

By Dewey from Wylie, TX

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August 18, 20140 found this helpful

The cables won't pull blower open all the way.

By Cathy

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March 1, 20140 found this helpful

I have a 97 Ford Ranger that has heat, but the blower is not working. I replaced the resistor and blower motor. What else could it be, the relay? or a vacuum leak?

By Harold

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By 0 found this helpful
January 18, 2014

My 95 Ford Ranger pick up was running hot. So I changed the thermostat and the radiator cap, and checked the anifreeze and water levels. It still ran hot. So I then changed the water pump, flushed out the radiator and added more antifreeze and water. Now it still wants to run hot. What else do I need to check?

By Jamie from Trenton, GA

Answer Was this helpful? Yes
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