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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Here are questions related to Ford Ranger Heater Not Working.
I have a 1997 Ford Ranger XLT 2-WD where the cabin temperature cannot be adjusted. It stays hot no matter what. I turn the temperature control knob all the way to the right and it doesn't effect the temperature. How do I fix this?
By Bimmerknut from Springfield, MO
Have you tried changing the thermostat?
My 1993 Ranger won't heat up. I've put in 3 different thermometers, drained and flushed the radiator, new heater core, new temperature sending unit and still no heat. The temperature gauge won't rise above the "C" and the heater blows cold air. Any suggestions?
By TG from Mcdonough, GA
Most vehicles have some sort of valve in the heater hose to allow water to pass through the heater core , it can be not working. Then there is the mixing door for the heater and AC. It could be stuck in the AC position (either works by vacuum or electric). It also could be the controls in the dash.
The AC will not shut off to get heat in my Ranger.
By Henrietta B.10/05/2012
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.
I have only high speed on my Ford Ranger heater fan. How can I fix this?
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
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
By kathleen williams04/13/2010
EMAIL: sales AT diyrepairmanuals.com
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?
By firedog658 from Cleveland, GA
By Patricia Hamm12/03/2010
My husband has to remove the hoses and flush them out as trash accumaltes in them. When he does and fills the radiator back up my heater works great again. Hope this helps.
I have a 1997 Ford Ranger. There is no air conditioner, just basic heat. Anyway I lost the low and medium fan control. That left me only with high. I replaced the blower motor resistor and pig tail (because it was so rusted) still nothing. I took the blower motor out and jumped it and the blower works fine.
I checked continuity from the new tail and it looks fine, any other ideas what might be wrong? Also, when I first start the truck I here a beeping sound coming from under the glove box this beeps for about 30 seconds then quits. It starts beeping again after about 45 minutes of driving.
By wosets4 from Lorain, OH
My 1996 Ford Ranger heater will not blow hot air. Any suggestions?
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.
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?
By Mike from Millington, TN
Go to Auto Zone and they will pull up a print out for you and you will find it. The most likely cause is a vacuum door is not opening cause by a broken or loose vacuum hose, listen for a hissing sound and you will find it, it will be under the dash near the big black box (heater box).
My 94 Ranger has a heater problem that I can not figure out. First off the the temp gauge does the windshield wiper thing, up and down, up and down. To make matters worse, often there is no heat. I have changed the thermostat and that didn't help. The top hose from the radiator does get warm, sometimes the heater hose gets hot. I've flushed the system once already. Any ideas?
Richard from Waterford, CT
By Mary (Guest Post)12/20/2008
My husband had the same problem with our 93 Ranger. Several years ago, after driving for 2 Chicago winters with no heat (he tried all the usual stuff), I suggested he SOAK the heater core in CLR over night. Then he flushed it SEVERAL times with clear water, reinstalled it and it still works fine! He is toasty warm...of course NOW the Air Conditioner does not work...but his window does!
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 Chris H.02/10/2014
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!
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
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?
I have a 1997 Ford Ranger and I can't shut off the heat. Do you know how I can fix this?
Check to see if the switch is connected correctly, the thermostat could be stuck in the closed position causing heat to come through vents, or blower motor may need checked for faulty wiring/or replaced.
How do I fix a 2007 Ford Ranger heater? It has been to the shop and they said there was no problem with the heater core, but only a leak. It still does not work.
By Dana P.03/06/2013
Turn your cold to hot mixture knob back and forth and listen for it to open and/or close. Mine puts out either cold or luke warm air. I was pulling a uhaul trailer and the temp never went above low on the guage. When I stopped because I thought I was low on coolant I was able to actually remove the cap and see it was full also put my finger in coolant and it's luke warm. I've changed out the door on a ford RV that one wouldn't move so you wouldn't hear it close. I flushed my system and I will be replacing the thermostat.
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
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
By Melanie Jackson01/05/2011
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.