Heater only blowing out front vents no heat to feet or defrost I can switch it to all the other options (feet, defroster, mix) and the light changes but the air continues to blower out the front 4 vents. Pressing the diffrent modes on the control console did absolutely nothing. My truck was stuck on the heat all last winter. Feb 18, 2013 · The vacuum runs both the heater damper door and the 4x4 automatic hubs. Heat only comes out front vents. Nov 8, 2015 · My wife's 2011 Civic is only blowing air through the front vents. Mechanic's Assistant: Are you experiencing issues solely with the heating system, or is the A/C also affected? Have you noticed any coolant leaks? Customer: I haven't checked the A/C since it's 12 degrees here, and there's quite a Jun 26, 2014 · Problem started after a trip to south florida it was blowing on and off out of the vents but weak. So basically, it's not allowing me to select just the dash, just the floor or just the defrost. The defroster is part of the heater and air conditioner system which is housed inside of the HVAC plenum and uses forced air provided by the blower motor. All the air comes out of the defrost vents but none comes out of the front. The system defaults to defrost when there's no vacuum, but if it's blowing from the dash, the leak might be specific to the dash vent actuator. I ran the diagnostic test that everyone mentioned and I got 4 blinking lights which means "An Open or Short in the Mode Control Motor Circuit". It seems stuck blowing out of the defrost and floor vents, no matter which vents I select. Jul 13, 2022 · Then while I can hear the blower blowing at corresponding intensities, it will only blow out of the windshield vents and on the legs. Now it will not switch back to the heat or defrost. The control will turn the blower off and on just fine and a/c along with max a/c works. This is manual temperature control set up. Oct 10, 2010 · Been searching for an answer and came up with nothing. Next I had to remove the covers located under the dash and above the pedals. Oct 13, 2013 · Cooling, Heating, Ventilation & A/C - Easy cheap quick fix for Ford defrost/vent problems - Hi Everyone, Thought I'd share my easy, cheap, quick fix for the defrost/vent problem. After a power loss to my AC controller (pulled it from the dash to work on the radio) air will only blow from the defrost. It is frustrating when your AC doesn’t work when you need it to, especially during the hot summer months. I noticed this was happening Car still got warm from the rear vents blowing hot air, but front dash air was stuck on defrost. The system uses vacuum to control all movement, up to the point (year unknown) when they went to electric actuators. My question is this: which part controls the vents in which the air flows? I know there is often a faulty check valve on the vacuum line but are Sep 25, 2018 · Re: AC/Heat Only Blows out Dash Vents by chrishawn416 » Tue Sep 25, 2018 5:47 pm I can change it from heat to cool and it works and so does the speed of the blower works. Usually when the vacuum pump dies or a hole gets pinched in the line, the Damper door will default to the Defrost position. The air will not blow from front of dash. My heat works just fine but seems to be stuck in the front position. Any ideas? 2013 GMC Terrain a/c air not switching to defrost/feet/front vents Chevy Equinox/GMc Terrain Blend Door Actuator Replacement 2010 Chevrolet Equinox only Blows Hot or Cool ( when other selected). Nov 27, 2024 · To fix air only blowing out of the defrost and floor, you typically need to check and possibly replace the vacuum lines or the blend door actuator that controls the direction of airflow in your vehicle's HVAC system. I tried searching related topics but every case seemed to be Jun 15, 2013 · I discovered today that I only receive air through the defrost vents. Once again, it doesn't matter which of the three it's set on, it comes out defrost and floor vents. Dec 27, 2020 · Hey there, having an issue with my heater vents only blowing out of the front vents, no matter what the setting. Mar 27, 2021 · Basically the air only blows through the defrost fans, ive looked around on forums and tried to find a solution but i cant find anything, if someone could Jun 27, 2016 · The default setting for GM heater boxes is defrost/heater outlets, so a vacuum failure will still let you defrost the glass. When changing modes to feet, defrost, etc, it just stays on the dash vents. I was luckily able to get it to switch over to AC for the summer. Oct 29, 2020 · there are 5 "flaps" under the dash controlling air flow thru the ac/heater box, all controlled by stepper motors. No. You should hear what's called a "blend door" that directs/re-directs where the airflow is sent. Jan 1, 2023 · The top-solving method if air only blows through defrost vents? If you are stuck in this case, click on this post, and we will show you the answer in no time! Feb 12, 2019 · SOURCE: Heat wont blow through heater or defroster vents common problem, check under dash by the gas pedal if control arms are muving went selecting from ac to heat cuz this it is the control for the vents to go from ac to heat and to defrost. Jun 12, 2025 · Incorrect thermostat settings can be the cause behind no heat coming out of the vents, even with the furnace blower turned on. It will not blow on the windshield when I put on the defrost or on the floor when I put it on the floor setting. Nov 8, 2022 · But unfortunately, air only blows through defrost vents, not the main front vents that blow air on your face. Jan 8, 2020 · 2015 - 2020 Ford F150 - 2016 A/C and Heat Blowing Only From Dash Vents - My 2016 Lariat SCREW has started blowing cold/warm air only out of the dash vents. May 20, 2023 · And when you turn the vent knob, say to blow air through the front-facing vents, you are essentially opening a vacuum line that pulls the vent door into the desired position. So you can not get air to the dash or floor vents. It's a 2011 Dodge Grand Caravan. The heater blows warm air, but only from the front dash vents. Everything worked fine until the autostart run the battery dead and the poor truck sat with a dead battery while we were away for three weeks. I checked behind the control panel everything is plugged in snug. Apr 23, 2018 · I have tried closing the outer vents, and then I can get a trickle of air our of the middle vents, even on highest setting (again, hear air being blown) -Rear vents not working at all -Defroster vents all work perfectly It will blow cold and hot air out of the vents that are working, so it doesn't seem like it's the blend door actuator. No matter which is selected, defrost, lower, etc the majority of air is from there. Feb 10, 2010 · my air/heat only blows out of the vents that are pointed at you It wont blow on the window or the floor my a/c controls work as well as defrost so that isnt the problem the blower changes speeds so is there a vent control behind the dash that switches the air flow btwn window Mar 8, 2022 · The HVAC system is designed to blow air from either the floor, mid or defrost vents. . When you click defrost, it just blows out harder in the front vents. I have nothing coming out from the front instrumental panel vents and the rear vents. I think there’s a misunderstanding. Now there are gremlins The heat works but only comes out the front vents, no air will blow out the defrost vents in the front. There’s no heat for the foot area, and not much defrosting either. My vents are stuck blowing from the ones in the upper part of the dash. Blend door actuator works (can change temperature). No matter which selection I make air only blows from floor vents. if one of these faults, it will usually show up as an IKHA code. 4L Lariat with dual zone control has lost the ability to blow out defrost or floor. It will not blow through defrost or front vents. It's not unheard of for the motor or the mechanism to fail. tried to change it to the floor or the dash vents, no deal. Turn the HVAC system off (turn the blower motor switch to off), and the radio off. I tried switching to floor vents only and nothing changed. This is a common system across virtually all domestic vehicles made in the previously mentioned time span, including GM, Ford, Dodge, and all their sub-brands. Aug 26, 2021 · 2013 GMC Terrain not blowing any air out of front vents So today my wife's terrain decided to stop blowing air out of the front 4 vents. 2015 Fusion. The next day I Took to the shop asking them to check vaccum first, and that didnt seem to be the issue, after tests and inspection they tell me its Customer: I can't change which vents my heat and air come out of. Apr 12, 2011 · The only vents working in front are the two on the top of the dash for defrosting the windows and the big one in the middle to defrost the windshield. Check the thermostat to ensure the setting is in HEAT instead of COOL. Everything seems to be Nov 20, 2019 · I have a 2016 F150 xlt 4x4 w/ 2. Apr 15, 2024 · It can be a safety problem if the defroster is not working, or quite uncomfortable if the vents are stuck in the defrost position. Had to play with the switch to get it to blow. There can be many potential reasons why the AC blower vents are not Customer: I have a 2010 Outback. Nov 7, 2024 · Addressing the issue of no heat coming from your vents can be daunting, but by understanding and troubleshooting the common causes, you can often restore warmth to your home efficiently. Not able to change to defrost or floor. The problem is this seems to be happening intermittently, occasionally it will just start working as normal again, which only lasts a while then all of a sudden only the front vents again. It seemed to happen after an electrical issue with my truck. Nov 27, 2008 · I have a 2003 Silveraldo 2500 HD. After starting the engine with the vent selected to front vents, air will blow out of the proper vent Oct 7, 2023 · 2009 - 2014 Ford F150 - HVAC is blowing through vents only - Recently my 2010 f150 5. I'm asking about my heat and air conditioning only blowing out of the defrost and floor vents. Here's what I did, and it worked for me. I have installed a new blend door actuator (at the passenger side) and realized after the fact that wouldn’t have helped my issue. All good. In the following guide we will show you what to check for depending on the symptoms of the problem which is based on what you can hear, and feel. as youre getting full defrost heat, but not getting full heat output from the dash vents, id check the operation of the bowden cable from the center vent red/blue dot Mar 22, 2020 · As stated in the title, I am only getting air blowing out of the defrost and floor vents but not the ones in the dash. it just won't change from dash vents to floor or defrost or anything like that mmsstar wrote: Tue Sep 25, 2018 5:33 pm Sounds like a bad blend door actuator. Dec 22, 2016 · If the heat in your Jeep Wrangler TJ is only blowing from the dash vents, here's what to check: * **Vacuum Leak:** A vacuum leak is a likely culprit. Controller shows correct settings. Please help, this is my wife's car and she is panicking because defrost won't work. My truck will not switch from defrost. May 29, 2008 · Help! I have a 2003 F150 and i am experiencing a heating and a/c vent control issue. Then turn off the truck, and disconnect the battery for 5 minutes. If your car's dash and floor vents aren't blowing cool or hot air, it's probably caused by a clog or electrical failure. Thanks in advance. Switch the system from blowing out of the dash (facing you) vents to the floor vents to the defrost vents and keep repeating this. If I say go to defrost a TINY bit of air will come out of there but not much, getting Oct 29, 2011 · When the air flow is set to floor only, floor and defrost or defrost only, the air always comes out of the floor AND the defrost but not the dash vents. Its a safety feature to make sure you can see out the windshield in the event of vacuum failure. So I agreed for them to do a diagnostic, and the report came back as the following: SCAN SYSTEM, NO CODES FOUND. And you can adjust how much air and the temperature as well still. The truck cools great and blows heat great but will only blow out of the front dash vents. The Problem: Although the selector switch is set to vent, the blower blows out the defrost, and or the floor. Turn the fan down to a lower speed and turn off the radio. 7 eco boost and I noticed this morning that I selected defrost but it didn’t defrost and the heat was still blowing out of the dash vents. Vent only blows on the floor and top of dash. Jun 28, 2016 · Try resetting the HVAC system. Dec 17, 2016 · Before replacing Heater Control Unit, it would only blow hot air from front vents- With this replacement it will now change from cold to hot and the air flow pressure does change from the front vents when changing the setting dial but there is still no air at all to feet and defrost. Do I need to replace the actuator? If so, where is it and what is the part number? Oct 31, 2024 · This wasn’t enough to fix the problem with heat blowing only from the face vents on my truck, but it needs to done as the first step and may fix it for you. This article deals with this problem and how to solve it. Tried multiple days of just spamming them while Parked to see if it would work. It is going to get really hot, really soon down here and I am praying that the "brain" of this HVAC control hasn't died on me. Reconnect the battery, then turn the ignition on, but do not start. lnz r6 yzo7d esusyl bsgak m8bbzb zgx fg4 jxevwqeu d6mgng