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If your Ford F-150 truck heater isn't working you will want to get it fixed before cold weather sets in. This is a guide about Ford F-150 heater not working.
It is maddening to get into your car or truck on a cold day to find that the heater is not working. Check out this guide for some troubleshooting ideas when your Dodge Dakota heater isn't working.
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I have an 04 Chevy Silverado 5.3 and I'm having heater problems. I'm not getting any air hot or cold blowing out, but when I get on the highway a very small amount will blow out. Days will go by and then out of nowhere the blower well start to work and blow perfectly fine on all speeds for a day or so and then it will stop.
By Andrew S. from Kansas
This same thing was happening in my husband's jeep. It was the heater core that had to be replaced.
Try having this done. Back flush the heater core. It cost me $100.00 to have. I had no heat at all.
I am 79, coming on 80 years old and still learning about a car. I own a
1994 Ford Crown Vic named Louie and he takes me everywhere. Hope this helps! Mrs C.
I just had my air conditioner replaced. My heater was working fine before I did. It would get really warm to the point that I would need to turn it down. Now it's blowing little to no warm air. I paid out a lot of money for the air conditioner work, only to have the heater not working all of a sudden. Could it be they did something during the work that would cause my heater to not blow hot air?
My heater stays hot thin back to cold the blower working fine
How do you get to the heat and ac vents that distrbute hot and cold air to the windshield? The hot air and cold air won't blow out of the bottom or windshield vents.
You likely have a broken fan.
I have a 1998 Chevy Z71 1500. My heater won't blow hot air unless I am driving it or giving it more throttle.
After reading several of your "why don't you just take it to a mechanic?" posts I feel compelled to respond. The whole idea behind these sites is to give people with some mechanical aptitude a chance to get advice on their car troubles so they, in turn, might be able to fix them. Labor is generally the most costly part of a bill from a mechanic and in some cases, worth it to have a professional do the work. However, there are many instances in which simple car problems can be handled by someone with some mechanical abilities and a few tools saving potentially hundreds of dollars on a repair bill. I hope this helps you understand the premise behind these sites.
U know its not only needing a trusted mechanic. Its the fact I done spent five hundred dollars getting ac fixed four months ago. For them to spend an hour replacing a 20 dollarpart.now I dont have six hundred for them to fix my heater. So thats what these forums r for. Im sure ur son GREAT trust worthy mechanic. But we dont leave near him. So please quit posting ur gp to a mechanic post.. we know this already.
Add more fluid and check for leaks
I have a 2002 Chevy Silverado. I turn the heater knob and nothing comes on. Can you tell me what is going on? Help, it's cold here in western New York.
I have a 1993 Chevy truck. I turned my heat on for the first time this year and it blows cold, last year it was hot. I replaced the T-stat and flushed the system with no luck. Is there something else that can be tried before I replace the heater core or should I go ahead and replace it?
I have a 2008 Silverado and yesterday I went to start it after only being parked an hour and heard a grinding noise, which stopped after 4-5 seconds. Then no air flow at all. I checked the blower motor, resistor, and wires, but it all is fine. The grinding sounds like it's coming from under the hood when it happens. It's happened again today and nothing will blow. If I wait 15 minutes, the air will blow again. Can an idler pulley or belt cause this? My belts need replacing.
My 99 S10 v6 heater/ac blower works well except the fan doesn't blow air/heat on the floor setting or the combination floor/vents. When I put the selector on floor setting, I can hear the "door" directing it to the floor open/close, and the fan running, but nothing is coming out of the floor vents. Also the blower doesn't work on the #1 setting no matter what vent setting. Position 2 - 4 works on all except the floor.
By Jerry c
Ohh wow! That was extremely helpful!!!! LMFAO!!!!
Check the vaccume hose that activates the vent door for leaks
I have an 07 Chevy van and that was my problem
Only had defroster venting until I replaced the vaccume hose between the intake manifold and vaccume ball
Now all works well again
Why is my heater turning on with the truck powered down? Also, when you drive, it turns off and on when it wants to. Only high speed works.
Hey can anyone please help? I just bought a 97 F-250 xlt extended cab and the heat will not work. It does not blow air and the heat/ac control does not light up. The truck did not come with a manual so I downloaded one from internet and I checked the fuses that the manual said were for the blower. I don't know how accurate the manual is because I'm also having an issue with my turn signals staying illuminated and when I take the relay that the manual says is for blinkers out they still have power. Anyway I do get a little bit of heat coming out while I'm driving but very little. I'm from jersey and it's starting to get cold can anyone please help.
I have never really read anything on this site which has been helpful for truck repairs, although problems with heaters are very common. Perhaps you could try googling for a truck repair/mechanics forum. My son belongs to several for modifying vehicles for off-roading. These are usually guys with a mechanical bent or actual journeymen mechanics asking each other for tips and advice. I would suggest that before you start making extensive repairs yourself, you take it to a shop with a good mechanic. I see many people on here who make extensive repairs, add all sorts of parts themselves, and still don't have their vehicle repaired. It is a false economy to attempt repairs yourself if you do not know what the problem is.
The heater will not blow hot air. The truck doesn't run hot and cools fine.
If it blows air at all, try checking the thermostat. It may be stuck in the open position, not capturing heat to blow into the cab.
Your heater fan is broken.
My truck is a 96 S10 2.2l with a manual transmission. The heater is not functioning. I have flushed and back flushed the heater core already and changed the coolant and flushed it too. So now I don't know what to do. I need help guys.
By Jon P.
Change the thermostat.
I asked my husband and he said the same thing as zoodad, so that is two in favor of so far.
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.
The key is you said it does work once in a while and you arent looking for a short or a switch problem and maybe you should. In the dash because it will work sometime and it wouldn't if the thermostat was closed. Think simple I would buy manual for the year of your truck and start reading. Being a female it was the way I had to learn how to fix my own vehicle. I think you'll find a simple small fix. Shucks guys I have fixed a radiator with a potato before.
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.
There is heat to the heater core, the fan blows cold air only to roof vents. When I open the cover to the heater core the fan blows the air out instead of sucking it through the core.
The heater on my '96 GMC doesn't turn on. I turned the knob and there is no air what so ever. What's the problem?
We have a 1997 Ford Ranger pickup. The heater is turned off and the blower is turned off, yet it is still pouring heat into the cab. Any suggestions?
I have a 1994 GMC Sierra with new A/C evaporator installed six years ago. The A/C works great with no bad odor. When the heater is turned on, the air has a bad odor. The odor continues (forever) during the winter. What could cause this?
leaky heater core, antifreeze around the heater core, replace or flush the system.
I have a 2004 Silverado. The heater works on one side, but not the other. One side blows hot air, but the driver's side doesn't, it blows cold air.
Call Auto Zone or O'Riley ' s I bet someone in there can tell.
Something fell in. How do I get it out?
Need to know the make, model and year of the truck, what dropped in and from where.
Why does my heater not blow hot air when it is turned to the red on the switch?
By J W
Need a bit more information to find an answer-the heater manufacturer, type, age, etc. However, it is possible that the element is damaged.
My truck heater blows hard, but does not get hot. If I turn the mix down it gets cool, but if I turn the mix up to total hot it gets lukewarm. There is a new thermostat, new hoses, and new fluid. It just don't get good and hot. The scan shows 180' hoses in and out of the heater core are hot going in an cool coming out. Could it be blocked in the cold hot mix? Can someone help?
Perhaps some of the heating elements stopped working?
My Chevy S-10 pickup heater only works when I drive fast. It'll work for a few seconds and then stop blowing hot air.
By David L.
Make sure your radiator is full of water.
I have a 99 Dodge 1500 that the heat blower works fine until you turn the head lights on; then there is no blower. Tried all settings and it just doesn't blow. If you turn the headlights off the blower turns on.
By Jamie G.
Louise, we all understand you are proud of your son, and I am sure he is a great mechanic...but replying to every post with "find a trusted, reliable mechanic" isn't really what this forum is about. This is for those who are mechanically inclined and may be able to fix the problem themselves.
I have a 2005 Chevy Colorado; it will blow heat and a/c and then it quits after awhile. If I shut the blower off for a little bit it will work again. I don't know what's causing it.
I'm not sure, but I too have a 2005 Chevy Colorado, and my blower only works on high. I'm wondering if this is a problem with Colorado's? I've checked for recalls, but have found nothing on this. Hopefully someone else will know the answer to your question... :)
Why does the fan in my '98 Chevy 1500 turn on and off by itself?
Sounds like an electrical problem to me. If you don't have the manual for your car go online and get one. Look up the problem once you get the manual.
What would be the problem if there's no power to the plug for the resistor?
By Samuel from Russellville, AR
The guide that is attached to this post has a lot of good suggestions. Here is a direct link to that guide. Click on any post to see all the information posted.
If you find a solution, please report back and let us know what you found.
My heater only blows hot air on the low setting, but cold air on high.
This usually means the antifreeze is old, and needs to be changed. It still has some ability to hold heat, so you get heat on low, but when you switch to high the extraction of heat is faster than the fluid can absorb. Replacing the antifreeze solution completely should solve this problem. You might also want to look at your thermostat, since a poorly functioning thermostat can create the same problem, except it never allows the heat to build up as high as it once did.
I have Ford E 250. The heater blower works, but there is no hot air.
Is the thermostat working? A poorly functioning thermostat never lets enough heat accumulate.
Does the antifreeze test in the correct range? Old antifreeze can't pick up heat fast enough to deliver it to you. If you get warm air on low, and cold otherwise the antifreeze is prob the first thing to check.
The heater core can be at fault. The hoses to and from the heater core. Check or replace them. A leak anywhere in the system can cause these problems.
Ford usually has excellent heaters, but they can only work well if everything is in good shape.
My new pick-up is blowing hot air out of the vents even when my heat is off. The only way to stop this, is to close all the vents and that's hard to do when driving and the other vents are on the other side of the truck. Once the heat is off I should not be getting heat coming out of the vents. This is over heating the inside of the cab and I have to open windows.
Does anyone know why this is happening? They have a recall that a part will cause a fire. I wonder if this could be happening to my truck? I am going to take it in once they send the letter for recall. Thank you!
It might be the switch is bad, I had that happen in my Tahoe. Your truck should be under warranty so I would just get it fixed, no reason to wait on a recall letter.
Sometimes it does, but not all of the time. It is just warm, not hot.
Are you low on antifreeze? Could also be a heater core.
I have a 1992 Chevy s10. The heater will not blow hot air and the only air that it does blow comes out of the floor vent behind the stick shift. It comes from there no matter which setting it is on. Any help would be much appreciated. The cold has set in.
By James R.
If you're air is just barely blowing, you may need a new blower motor. If your air is blowing, but isn't hot I would guess that you need a coolant flush. Hopefully you don't need a new heater core. But I digress. . .
If you can't change the direction of the air flow in your pick-up chances are that the cable or control arm connected to the actuator broke. Could be that it somehow disconnected, but not likely.
If you're feeling frisky you can go to your local library and review a Chilton's manual or something of the like. If I remember correctly, you'll want to locate a GM pick-up manual. You'll find step-by-step instructions on how to take everything apart.
Remember: It's not that working on your vehicle is difficult. It's just a matter of how much time it takes, and whether or not you have the tools to do the job. To my experience you'll most likely need some screwdrivers, a socket wrench with metric sockets, and some star bits. And a good light source is a must. You can get a "security set" of something like 100 bits at Harbor Freight for about ten bucks.
Take your time, pay attention, and make the effort to be organized.
I have cleaned my system out. I have made sure my hoses were not crossed, I have coolant, I have changed my thermostat and I have also made sure my core was not stopped up. I still have no heat, just cold air. I have checked my flap with my knob controls and it opens and closes. What can I do for the problem?
Don't worry about the air duct flap. Find the fluid control valve, that sends hot radiator fluid to the small interior radiator. Most likely that valve is stuck.
On most vehicles that valve is a rotary type valve, and luckily, some WD40 and some energetic cranking back and forth with some vise-grips for a few minutes, will loosen it up. Disconnect the wire or cable pull running to it, before you start forcing it.
If you can't loosen it up, replace it.
The a/c is not blowing cold in my 2004 Ford Ranger.
By Dennis from Rockledge, FL
You probably need to have your A/C recharged with freon.
I have a Ford 250 diesel pickup and it doesn't heat at all when it gets really cold. It is an intermittent problem. When it gets down to -20 celsius or colder it doesn't work. When it's above that temperature it works normally. The heater fan works and the antifreeze is good. If anyone has any ideas they would be appreciated. I had the truck at the Ford dealership and they said they could not find the problem.
My 2014 Dodge 1500 heater and thermostat are crazy. Why does the temperature gauge stay on cold after the temp outside is below -19, but after running the truck for 20 minutes and shutting it off the heater and gauge work properly. It has gone to the dealership several times and they can't figure it out.
I replaced the radiator and thermostat in my 199 1500 Chevrolet pickup. The climate control wasn't working properly so I replaced that. The air is now blowing fine, but I have no heat.