Heater not blowing warm air. jump. We run our reverse skipper ball line through the dryer duct forcing all the lint and debris outside. Rear ac does not cool. The little amount of air that comes from the vents is cool when the AC is on, but it does not blow with any force, almost as though something is stopping it up. HEAT & AC not working either 6 Answers. The way it is worded can be interpreted to mean: No electric fan operation, or. A/C pressures running are about 35-38 low side and 155-160 high side. 3,988 satisfied customers. 1999 to 2016 Super Duty - AC BLOWING OUT DEFROST in a 99 f-250 - I have a f250 super duty 7. When using the HVAC, the system wont blow any air through any vents. There's no heat at all. I have a Ford F-150 1999 V8 Triton. 40’s, traction bars, cross over steering, mile marker hubs on my truck, and ignored my vent problem. Some of them work off of a cable and others work from vacuum. Forums. Ford, for some dumb reason, replaced my heater core because they cliamed that would fix the issue. Let it run for several minutes, then engine off. Assumed blower was bad. The a/c will only blow through the defrost vents. Dive into these. Your blend door motor IS your defroster problem , as it is needed to direct heat mixed with the ac to properly defrost the windshield . - . Fan blower cuts out randomly. Just the dash vents won’t blow. 3,579 satisfied customers. of course it didnt fix a thing so if pulled the truck from the. . 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. The pollen filter, also known as the cabin air filter or microfilter, is responsible for filtering the air that the passengers breathe in the cabin. When I physically operate the plunger it does open the door and sucks air in. If all fuses are good, remove the center console part the houses the HVAC controls and radio. The rear a/c in my ford econoline van is not blowing, only the bottom blows hot air when I put the rear a/c on. Heater blowing cold air. I can still hear the fan running, but no air from defrost, floor and upper vents. Cat Engine Expert. it's a vacuum reservoir for the vents. Check the fuse for the blower motor and the temp- limited switch give these website a try and if all fails stop by your local Ford dealership in the part department and they print you the pictures and diagrams you need wish you the best of luck Michigan Man. If you aren't getting warm or hot air regardless of the settings, you may either be low on coolant or have a bad thermostat. The air flow in the vents in the front row of the cabin blow very weak. . I took it to the dealer and they couldn't find a. I have a Ford F-150 1999 V8 Triton. 1973 - 1979 F-100 & Larger F-Series Trucks - Air won't blow out the defrost vent - Hey yall, I've got a 78 F-150 that I'm getting road worthy. I have a 2017 Expedition, front vents not blowing any air but back vents are. Search Fixya. the only vents that work is the defrost vents in the front by the windshield. the heater vacuum motor and lines needs to be checked. Need key code for ford radio 5000 RDS-EON. It didn't do anything. If blow-by isn’t vented from the crankcase, excess pressure can force motor oil through seals, gaskets, and even the engine air filter. it's 1999 so I'm told it doesn't have a cabin air filter . This can also damage other parts of the system if ignored. 3 and the ac won't blow through the vents. If your rear AC vents aren’t blowing air, there are a few potential causes. 1999 to 2016 Super Duty 1999 to 2016 Ford F250, F350,. #9. blows. Gain access to the mode door actuator and remove it from the ventilation box. No Cold Air Blowing out of vents Air conditioner just blows out warm/hot air only what would cause this it just - Ford 1998 Escort question. 2004 - 2008 Ford F150 - A/C turns on but won't blow any air! - My a/c will turn on but it won't blow air nor would it blow heated air. Check WIPER fuse (20-amp) located in instrument panel fuse panel. read more. I think you should focus on the blower motor resistor, which is in line to the blower motor under the passenger side dash. If this happens, there isn’t any power getting to the blower motor, which will prevent air from coming out of the vents. Blows air just not cold. Some of them work off of a cable and others work from vacuum. This is most likely due a failure of a part called the air temperature control blend door actuator motor and that is often caused by a sticking blend door that the motor drive operates that has become warped from the heat of the air on heat mode. 1. If there’s no voltage, test the resistor (YouTube). . I can still hear the fan running, but no air from defrost, floor and upper vents. read more. read more. No heat, air conditioning, defrost, etc. the hoses in the dash are fine and not leaking air. that is the flow chart for repair. light is on for a/c but no air. possible knick in hose behind the glovebox also. Full Force 180/0 single shot injectors, TS 6. see the next steps and fix it. The truck's been parked about a year and a half and I noticed last fall that I couldn't get the defrost to blow hardly at all. If you feel no air is blowing from vents in your house, vent blockage is most likely to be the issue. If the inlet is hot and the outlet cool, heater core is plugged. Your A/C won't work below certain temperatures. Disconnecting the battery will force the module into a "learn" mode. Anonymous. I took it in. The climate control assembly has three system controls: The A/C heater function selector switch combines a vacuum selector valve with two electrical switches to supply battery positive voltage to the A/C clutch circuit and the blower motor control circuit. It wont be a fuse doing this,it will be what is called a blend door actuator motor,that control,s heat to cool,it is located under the dash on top of the blower box. The blower motor itself is spinning up but I am getting very little air out of the vents. My truck is getting no air through the vents. Fan operating, but no air coming out. If you have a vacuum leak it will default to defrost. Detach the two passenger air bag defeat switch electrical connectors. The mode selection is done through a series of air doors that are operated by vacuum. See. On the underside of the block, there is a ball bearing that works as. I have a Ford F-150 1999 V8 Triton. I can still hear the fan running, but no air from defrost, floor and upper vents. Second, check the fuse box located below the steering. As the relay is the switch that supplies current to the blower motor, if it fails internally, then power will be cut off from the blower motor circuit, causing the motor to no longer function or blow any air from the vents. New posts Search forums. 3625 posts · Joined 2009. 5,355 satisfied. it will work perfectly for 5, 10 15 minutes then blows hot airThe front AC stopped working completely blows no air. Pop the hood and find the vacuum line that goes to the outlet labeled "A/C" on the main vacuum tree (on the drivers side of the firewall). When using the HVAC, the system wont blow any air through any vents. The most common cause of the vacuum leak is a bad vacuum line to the vacuum canister and check valve which is mounted under the evaporator case in the engine compartment. 2005 f350 6. Low coolant: Whether caused by a leak or water evaporation, low coolant is the most common source of poor heater output. BRRRR it sure is cold! - dmtn , Martin, TN, US. bertronic21; August 14, 2023; Stock 2011 - 2019 Ford Explorer Discussion; Replies 3 Views 258. Posts: 300. THE VENTS DON'T BLOW ANY AIR WHEN SWITCH ON DASH TURNED ON. Asked by jo4ti Apr 26, 2013 at 11:18 PM about the 1999 Ford Explorer 2 Dr Sport 4WD SUV. First it was blowing normally from the dash but during acceleration or under load, the a/c would randomly blow from any vent, from the floor, dash, defrost. Remove the center console. I checked the electrical box for the AC fuses. 1 Disconnect the vacuum line connector. the resistor and the switch provide ground, so the blue/white wire should have power, and the blue/black wire should have NO power, if it does have power, then most likely the resistor is bad. u have a engine vacuum loss to the AC mode control switch (this switches the different functuions, dash, floor etc. First, check all the fuses with a test light to see if any are blown. Blower only throw defrost and not vents - The air will only blow throw defrost and not the vents no matter where I turn knobIn this video, Andy shows you how to diagnose blower motor problems in Ford vans! He'll show you what to look for, and what you might have to replace to get your air blowing at. 2005 Mercury Grand Marquis with 137,000 miles. The only thing left is to replace is the front control panel itself, I guess?This will remove the fan assembly. 0. Super frustrating on a new truck. You might try putting a flush tee in the heater hose at its highest point . If all the vents exhibit decreased airflow, then it could be a blown fuse or bad relay. I can detect a small amount of air coming out of the defrost vents and the floor vents when it is on high. Defrost vents seem to be more restricted than others flowing almost no air at all. Whenever there's a vacuum leak the truck will default to defrost. Please help. If it works then the resister pack is blown. Blend Door -under the dash on your print. 00 so i called Autozone the man there told me I needed a repair kit for the blend door $16. Rear air ac works as advertised and flows out like normal. Furthermore, it can cause an inconsistent or intermittent fan speed, leaving you without proper airflow. Back AC works fine. Inside, you will find the line heading up to the dash near the passenger foot well. I have a 1999 F150, 4. 2003 Ford Explorer; Open Questions: 0 answers. Despite the setting showing air should be coming from the main dash vents, I'm not getting any flow from them. Nov 05, 2012 • 1999 Ford Expedition. Have you checked the AC filter? It tends to get choked over time, especially given that it pulls all the air from the front/engine compartment. No heat, air conditioning, defrost, etc. 3 diesel The front. 1999 ford: When I turn the air conditioner it works. I have changed the little box that contains the five relays. Carefully pry to release the four clips retaining the center instrument panel finish panel. No 12 volts at compressor. I bought this 1999 ford escort zx2 the other day. We begin to clean the furnace by cleaning hot and cold plenums as well as the blower. But, when I move the dial to switch the vent position, it stays. One of the first symptoms of a bad or failing AC blower motor relay is a blown AC blower motor relay. The most common causes for AC not cooling properly in Ford Expedition are low or overcharged refrigerant, compressor malfunction, clogged cabin air filter, dirty condenser or evaporator coils, dirty or sluggish blower motor, and bad fuse or relay. , As you probably know the doors and actuators are all vacuum controlled. the air conditioning has been intermittently blowing hot air. David answered 5 years ago. A few minutes into the drive I pressed the button to turn the blower up and it stopped working all together. Symptoms Of A Bad Blower Motor Resistor. If the coolant level should drop as the thermostat opens, top it up as necessary. I recently discovered an issue when turning on my A/C for the first time this year. Hopefully it's nothing terribly expensive. If the a/c discharge temp drops you have coolant flowing to and through your heater core. Sponsored by: 11-07-2014, 02:39 PM. If so, the compressor is working and the A/C system probably contains enough refrigerant to make cold air, so the problem is inside the HVAC unit. If WIPER fuse is blown, go to next step. you can check the a/c charge with a guage you can pick up at your local automotive store. 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. AC system won't blow strong enough to cool the cab down. #1. Read full answer. . On the 'repaired' truck you can barely feel the cool air 1-2 feet. Why will the blower not blow air through the vent on the dash on my 1997 e. SOURCE: climate control is on defrost only the auto. 3 Slide the rod out of the door and. 134a the pressure goes up to 30 to 40 lbs on the gauge but does not hold goes back to 0 and no affect on cooling the air coming out of the vents. Check the vacuum hose at the hubs for leaks or damage. At times it would blow hot air, but would stop after the car was turned off and on. 1 1. SOURCE: No air flows from dash vents. Engine is running but no heat through the vents even when set to full. When the temp knob is moved the door opens or closes some. Any help?attn: kenny z (ford expert), re: 1999 ford escort wot relay bypass. The switch on the dashboard that has the A/C, Floor, Defrost, Vent/Floor, etc.