Question about 2008 Ford Ranger 2WD

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Where is vaccum line for heater?

There is no difference on air flow and where it goes

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  • Ford Master
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Check lines on engine, all of them than check under dash on passenger side. Usually it is the ones on engine and when fixed engine usually runs better

Posted on May 12, 2014

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Need pitcure of vaccum lines on 1999 Ford Ranger v6 3.o air and heat blows only threw the defroster.


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Item Part Number Description 1 18A318 Vacuum Control Motor-, Panel/Defrost Door 2 18A478 Panel/Defrost Door (Full Vacuum Position) 3 - Defrost Air Flow 4 - Side Window Demister Air Flow 5 18B545 Temperature Blend Door (Full Heat Position) 6 19860 A/C Evaporator Core 7 19A813 Air Inlet Duct Door (Full Vacuum Position) 8 - Outside Air Inlet 9 18A318 Vacuum Control Motor-, Air Inlet Duct Door 10 - Recirculated Air Inlet 11 18527 Blower Motor 12 19A566 A/C Vacuum Reservoir Tank and Bracket 13 - Vacuum from the Engine Intake Manifold 14 19B888 A/C-Heater Function Selector Switch 15 - Vacuum to the 4x4 Hub Solenoids 16 18495 Water Diverter Valve (Full Vacuum Position) 17 18476 Heater Core 18 18A559 Floor/Panel Door (Full Vacuum Position) 19 - Floor Air Flow 20 18A318 Vacuum Control Motor-, Floor/Panel Door 21 - Panel Vent Air Flow

Dec 09, 2016 | Ford Ranger Cars & Trucks

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When i turn my heater on it blow out air on lo speed when i put it on hi hot air move to the defoster


well unfortunately, there is probably not a real easy fix, even the though the problem is probably pretty simple. the air flow in most all cars is directed by vaccume from the engine.. if you look under the dash in the general area of the heater controls, you might be able to see a bunch of plastic or rubber tubes..if there is an air leak in one, then the gate that directs flow does not have enough vaccume to direct the air,.instead the air directs the gate. its an upside wn nightmare usually to get to the....a mechanic or dealership is my suggestion

Jan 28, 2015 | Cars & Trucks

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I have problem heating the back seat section, the blowers are ok, but only cold air comes out. Please help!


Check and see if some one has bypassed heater core hoses. If they have theirs a goo bet the heater core leaked and needs replacement befor new hoses can be installed. Depending on year there is a valve in heater core line that tells hot water to flow it maybe stuck or no signal to valve is being recieved. If its operated by a vaccume hose make sure its not broken. This may require you access the heater control panel in dash make sure vaccume is being recieved and that hose to heater valve holds vaccume. If vehicle is a later model then control panel maybe electronic and electrical diagrams necessary to futher diag.

Jan 10, 2011 | Pontiac Montana Cars & Trucks

2 Answers

Ac and heat air flow stuck in defrost postion up top .


The hvac blend doors are vacuum actuated. It takes vacuum from the intake manifold via a line that goes through the firewall just right (passenger side) of center. Open the hood and look for a disconnected or broken line in that area and repair as needed. The default position for the blend doors is the defrost position. When vacuum is lost you'll experience what you've described.

Sep 05, 2010 | 1986 Buick Century

1 Answer

A/C blows thru defrost on my 1997 jeep cherokee


sounds like you have a vaccum leak on your engine, the switch that controls where the air flow goes is controlled by vaccum. check your vaccum lines and check the switch.

Aug 21, 2010 | 1997 Jeep Cherokee Country

1 Answer

1999 Dodge Caravan SE's intermittent heater


it sounds like a vaccume leak check under hood for vaccume line that goes through the firewall trace this line and look for leaks next pull controll unit out of dash most times this unit is worn an will leak causing lak of controll of the heat an airconditioning

Feb 13, 2010 | 1996 Dodge Caravan

2 Answers

What doe the code mean p0171 for 2004 mercedes c230 and my check engin light is on? Can some one HELP me please


either a vaccum leak, or a dirty mass air flow (maf) sensor. the sensor you can clean with crc maf cleaner spray at your local auto parts store. as for the vacuum leak, i heard there is a recall for m271 engines to replace two faulty vaccum lines. one line goes to the s/c, and i believe the other one is right next to it. check if your car needs this recall and go from there.

Dec 12, 2009 | 2004 Mercedes-Benz C-Class

2 Answers

A/c ford winstar 96 not worling only heather and


Possible you have a vaccum leak or blockage.The direction of flow for heat and air is controlled by way of vaccum lines.

Dec 08, 2009 | 1998 Ford Windstar

1 Answer

Heater


if its only coming out certain vents and will not change the vents when the dial is switched, it is probably in the vaccum lines under your dash behind the glovebox. Should be a long bar with a bunch of different colored vaccum lines hooked to the side of the hvac box. One comes in from a different direction then the others and that is your main vaccum feed. Check that one first. If it has vaccum check the lines at the plungers mounted on the side of the hvac box. (big round things) they should each have a line going to them, make sure they didnt break or unhook. You can squeeze the plungers by hand and it should change which vent the air comes from. If this makes it change its deffinatly a vaccum problem? Hope this helps.

Mar 14, 2009 | 1998 GMC Sonoma

1 Answer

My 1995 ford areostar van when heat is on only blows cold air


The aerostar has a vacuum operated watervalve in the heater tubing.the valve is located on the
passenger side inner fender behind the aircleaner.with someone operating the controls inside the van
you can check to see if you get vaccum by removing the tiny hose that goes to the water valve
and checking for suction as you in the van person operates the heater conthttp://www.fixya.com/PostAnswer.aspx?thid=1323651&prdid=696348rols. If you have no
vaccum there is a break in the hose between the intake manifold and the valve. If you do get
vaccum check to see if the valve changes position from vaccum on to vaccum off. you can see
this motion on the small lever on the side of the valve. If the valve lever doesn't move you can
move it manually to allow the water to flow through the heater core. if the valve won't move manually
there is an obstruction in the valve. If it does move manually the vaccum diaphragm is gone.
replace the valve. if it moves to the manual open position you can hold it open with a tywrap.
before you get to this point you should first check to see that there is enough coolant in the
radiator. If you still have no heat you can check the coolant flow through the heater core. to do
this remove both heater hoses from the valve and pump water from a hose into one of the hoses
water should flow from the other hose. If it doesn't the heater core is blocked. The rear heater
operates the same way with the watervalve under the van just behind the drivers seat.
Good luck.

Dec 02, 2008 | 1995 Ford Aerostar

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