Question about 1999 Ford F250 Regular Cab

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Vacume pump interior control for cabin vent system and defrost valve- located under the hood on the passenger side on the wheel well. What is this unit call by ford? Part number -f81h-2a451-b

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

tripletauto
  • 1450 Answers

SOURCE: Air conditioner blows through defrost vents

LOOK AT THE WHITE PLASTIC HOSE GOING TO THE RECIRC VACUUM ACTUATOR UNDER HOOD. THIS IS ON TOP OF A/C BOX BY RIGHT SIDE OF FIRE WALL YOU WILL FIND THIS HOSE IS STARTING TO COME APART REPAIR HOSE AND PROBLEM FIXED.

Posted on Sep 13, 2008

  • 37 Answers

SOURCE: PROBLEM WHEN SELECTING THE DIRECTION FOR THE AIR

Sounds like you have a supply vacuum problem. When you lose supply vacuum to the control head it defaults to defrost.

Posted on Mar 13, 2009

asetech74
  • 218 Answers

SOURCE: cabin filter 2000grand cherokee 4.7 liter v8

Your cabin filter on this vehicle should be behind the glove ox, gtly remove your glove bx and you should see the compartment for the filter behind it. Hope this helps.

Posted on Mar 17, 2009

  • 11 Answers

SOURCE: 2000 toyota tundra water leak passenger side under dash

It may be leaking through the evaporator intake vent... There are no TSB's for any kind of water leak in 2000, you may just have to start disassembling stuff until you find where the water is originating from. It's probably something stupid, but check any rubber grommets, harnesses, the evap intake port, anything you can see that goes into where you can get it to leak from.

Posted on Jun 06, 2009

  • 60 Answers

SOURCE: coolant is leaking into the passenger side of car

it sounds like your heater core is leaking , the heater core is like a small radiator that is used to heat the cabin of your car. if the heater core is bad or one of the tubes are cracked or rotted this will cause coolant to leak into your car. the heater core is usually located under the dash in the same box as the a/c evaperator.

Posted on Aug 19, 2009

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Heater works in cab blower works in cabnin just not blowing heat


hot air not being directed to vents? Check vaccuume hose under hood

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1999 escort heat shift from floor to defrost


you have a vacum leak check under the hood usally they make a whistling noise. Im sure one is off or broke. if this was helpfull please leave me good feedback ps the broken line could be under the dash usually on passenger side going to heater box. but the problem is usally under the hood. check hose on pcv valve

Feb 20, 2013 | 1999 Ford Escort

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MY A/C IS ONLY BLOWING OUT OF THE FRONT DEFROST VENTS.


Depands on year and model. Early models have a cable with directs the vent openings. If early check cable has not come off behind the sliding knob or more common the cable is broken. If later model usually controled by vacum. Check behind dash for hoses connected. First check under bonnet on passenger side near firewall. Look to see if small vacum hose has not come off or is cracked. It is about 3/4mm (1/4inch) thick. It runs into the cabin through the fire wall. Inside the car it is behind the turn knob in the dash. Again check hose and connections. I have even found them fallen off under the passenger side dash, people kick the hoses without realising.
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Jun 12, 2011 | Ford Explorer Cars & Trucks

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Looking for location of fuel pump relay switch on a 1994 Honda Accord LX


Hi!!

Check for a 15A Fuse labeled FUEL PUMP on the cabin Fuse Box located in the front seating area, driver side, under dash, behind kick panel.

The diagram shows the Main PCM relay controlling the Fuel Pump, but it wont hurt to check the cabin fuse box under hood, passenger side, rear side of strut tower, mounted in fuse/relay box on firewall
Don't forget to rate this post, Good Luck!!!

Jul 24, 2010 | 1994 Honda Accord

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Where is the cabin filter on a 2005 Grand cherokee ?


Location of cabin air filter (under hood, passenger side), shown without the filter cover installed.
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Jun 04, 2010 | 2005 Jeep Grand Cherokee

1 Answer

The glass is foggy


When control put on defrost a/c compresor should also come on, with defrost on look under hood and check that compr. is on, you can still control air temp from your controls, also make sure that when on defrost that air is coming out of defrost vent, if it is not could be a bad vacum hose, look under hood for vacum hose going into fire wall that it's connected and that it has vacum, good luck, hope this was very helpful.

May 14, 2010 | 2004 Jeep Grand Cherokee

1 Answer

Defroster is the only place the blower will deliver air to. The floor vents work just slightly but it wont switch from vent to floor etc.


Check for a loose vacum line under the hood over by the fire wall on passenger side if no vacum at that hose add vacum.Good Luck.

Dec 11, 2009 | 1996 Chevrolet Blazer

3 Answers

96 mustang a/c is cold and blower fan works. the problem is that it only blows out the defrost vents on top of the dash, not the normal vents? it would appear to me that some sort of a selector switch or...


The first thing is to check for a bad vacuum,under the hood.There is either a check valve,or a vacuum reservoir involved in this vacuum system.Look for a canister(could be round like a ball or look like a can or any shape)under hood,most likely hidden under a fender.If not found,look on passengers side of car,near the windshield next to fender and firewall.The check valve is a small plastic device,with a vacuum on each side of the check valve.It could be busted or the vacuum could be collapsed or have a pin hole in it.If you can not find any thing wrong,replace the vacuum lines that go to this system.If it still does not fix the problem,replace the vacuum control switch in the dash.It is located in the control selector.If I can help,let me know.>>roniecon@gmail.com

Aug 17, 2009 | 1996 Ford Mustang

3 Answers

No air from vents


you have a vacume leal to the heating a/c system it has gone to defalt by blowing the defroster check the vacume lines coming of the passenger sid of the intake manifold ther will be a few hoses the one you are looking for is the one going into the firewall and will have a one way vacune ckeck valve in it if it in in backwards it will not alow any vacume to go to the system and it will not operate. ck to make sure that you have vac from the manifold to the line into the fire wall and if you do then the problem in under the dash and can be alittle more troble than you want to undertake.ch under the hood first as the lines tend to crack with heat and age.

Jun 24, 2009 | 1999 Dodge Durango

1 Answer

When i turn on heat or ac it runs on the defrost setting but wont shift to the vent or floor until the 4 wheel drive knob gets turned on 1999 f250 I heard this was a common problem is it the switch for 4x4...


you have a vacum leak in the 4x4 engagement system. there is a vacum solenoid on the passenger side next to the battery. should have 3 hoses to it I believe. check those hoses for cracks they go all the way to both front wheels. the ones in the wheel wells are usually messed up. if all hoses are good hook up a hand held vacum pump to each wheel they should hold about 15 hg on the vacum guage if not your wheel hub seals are leaking.

Jun 24, 2009 | 2002 Ford F250 Super Duty SuperCab

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