Question about 2001 Ford Windstar

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No heat expect vacuum line is off how do I get to it

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This vacuum line runs from the intake manifold to firewall on the pass/side then inside on pass/side. with engine running you should hear a hissing sound, it most times breaks in the engine compartment. take a look around you may have to use a mirror to see the backside. you may have to take the wiper bucket out.

Posted on Oct 04, 2010

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Posted on Jan 02, 2017

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Heat wount come out of floor ventjust defrost vent


First thing I'd do is check the vacuum lines on the vacuum reservoir under the hood, then the heater box vacuum lines. Replace any bad ones you find. Run the engine and see if there is a good vacuum coming to the heater control. The doors that move the heat up and down to the vents, defrost, floor etc are run by vacuum. If you don't have vacuum there, check the vacuum lines under the hood and repair as necessary. Good luck.

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Why dose my 2006 crown victoria not give me a\c?


sounds like the damper to your heater core is not closing. your heater core is under your dash on passage side you should see a vacuum line plug to a solenoid. crank your engine then while your looking at this solenoid have someone turn the heat to cool then back to heat a few times see if the arm on the solenoid is moving. if it don't move unplug the vacuum line have them turn it from heat to cold a few time see if you feel a vacuum when they turn it. if you have vacuum on the line and the solenoid don't move more than likely it's the solenoid but if you have no vacuum on the line it's in your control panel unless you have vacuum line off on the engine going to it. to check get WD40 with engine running spray every vacuum line you see only about 4 to 6 inches at a time and if you here any change in the sound of engine you have a leak there.

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rough idle can be caused by vacuum leak, test the lines into the intake, if the dont hold vacuum, follow the line to detect the cause. Also the PCV could be broken and lead to a wrong air mixture. If check engine light is on I would expect lean bank codes...

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Cabin heat


Yes, it might be hard to find such a diagram. Short of a factory service manual, I don't know. Perhaps a friendly parts person at a Chrysler dealership might be able to provide you a copy of how the vacuum lines connect, and how routed.
What you generally have is a single vacuum line from the engine going into the firewall and under the dash to the rear of the heater/AC control assembly. The line enters a fixture that can distribute vacuum signals through several hoses. One of those is the hose to the water valve, the only vacuum line that goes back into the engine bay. Selecting heat on the control obviously will send vacuum from the fixture to the water valve. The other hoses or lines connect to diaphragm operated door levers to control where air is sent.

See where the vacuum line for the valve goes back into the firewall. Then get on the inside and try to find that line-it may have broken or come apart. You may need to pull the heater control assembly out to get to the podlike fixture that the vacuum lines sprout from.
An alternative in this frigid weather, a make-do temporary fix, is to tee off a manifold vacuum line from the engine, and run a hose to the water valve. It will be on constantly, but it's winter, hey?

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1 Answer

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Check your fuse on the side of the dash, driver side. Look to make sure the fuse has not gone bad, and replace if the fuse to your HAVC has gone bad.
The other thing that can cause this issue is bad vacuum line to your HAVC system. On the drivers side by the corner where the windshield meets in the engine compartment, there is where your vacuum canister. Follow the vacuum lines and look for any damaged lines throughout your jimmy and replace any damage lines.
Poor vacuum will cause the issues your have described and the other thing also that has been found is the vacuum switch to your 4WD on the transfer case to go bad and leak transmission fluid in to your vacuum line causing the same issues you have described.
Start from the beginning and 1.check the fuse, 2, check the vacuum line. 3 check to make sure there is no transmission fluid throughout your vacuum lines and replace the vacuum switch on the transfer case if there is. ($15.00 part at Auto Zone or Napa)
Thank you for using fixya and good luck

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1 Answer

The blower will not change from the upper vents to the floor vents. The blower, AC and heat all works well but cannot cet the vent source to switch from the upper vents to the floor


sounds like you lost vacuum there is a vacuum line running from engine thru firewall that supplies vacuum make sure it,s not off or broken hope this helps this is my last post on this website they do not live up to thier expectations so i will be posting @ another website in future

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1 Answer

Heater temp on mercury '98 mountaineer only blows hot


Everything that is heat and cooling in a vehicle is controlled by vacuum from the engine. It appears to me that your blend door vacuum line to the temp control switch is either off or cracked/broken and not making things work the way you want/expect. It's the vacuum friend.

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1 Answer

1998 olds 88 heater off switch is on a vacuum line


Have you checked the vacuum line with a gauge? If so, how many pascal units does the vacuum line read? Vacuum gauges are around $5. Furthermore, I believe the design is sealed vacuum only system. The solenoid could be bad, but to my knowledge it is not an electrical component. A split in one of the vacuum lines could be cause of your problem. You would have to trace the all the vacuum lines back to the source to find the problem. You would need that gauge to detect a leak in the system. Could also replace all the vacuum lines on principle since the vehicle is going on two decades.

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2 Answers

1996 GMC 1500 4X4- NO HEAT- NEW THERM / NO HEAT TO "IN" LINE TO C


there is a vacuum line running to a vacuum switch on one of the hoses try taking the switch out and connecting the hoses together. Thats what turns off the hot water while the air con is on. If that works then its bad or the vacuum line going to it has a problem.

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