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95 Pont. Bonnie blend door is stuck (?) so A/C blows from top and bottom only. NO vac. leaks and Dash control is NEW. A/C is charged.

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Could be the operating valve has rubber diaphragm and this is perished ,so it wont work

Posted on Aug 01, 2010


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1 Answer

87 chevy caprice A/C vent not opening

Depends on what is clicking. The engine vac opens blend doors under the dash. It could be one of the vac pots or a blend door is sticking. Normally the hissing noise means you have a leak, but a leak usually does not fix itself.

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Air is only blowing through panel not defrost or floor

Depending on the make model and year, it could be a vac leak for the HVAC controls, or a stuck blend door under the dash.

Dec 25, 2012 | Cars & Trucks

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My 1984 grand marquis does not have interior heat.

re check the coolant level, it most likely dropped when your engine reached temp for thermostat to open and took what you had just poured into radiator and put it in the block.

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A/c not blowing correctly

I would look for a vac leak or faulty blend door under the dash.

Jul 30, 2012 | 1988 Cadillac Brougham

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96 explorer wont blow a/c out of bi level vents also only blows on high

There is a vac control for the blend door to direct air flow. You may have a vac leak between the control and the engine - or the blend door may be stuck.
The blower motor uses a resistor to change speed, high speed bypasses the resistor. Check the resistor for melted wires inside.

Jul 21, 2012 | Ford Cars & Trucks

1 Answer

Why does the air not come out of my vents it was working fine until yesterday!

If the direction of air thru the vents is not being controlled by the dash control, the problem is usually a blend door stuck or faulty activator.
If the activator is vacuum operated, there could be a vac leak between the dash and the engine.
If the activator uses an electric motor, the motor could have failed, or the device that controls the activator.
The blend doors are behind the glove box.

Jul 17, 2012 | 1996 Buick Park Avenue

2 Answers

Ac is blowing out of defrosterandnot panels in the dash. Air is cool cold air will blow out of rear seat panel/vent 1998 ford explored

The most common cause is a bad blend door actuator which controls air flow throughout the cabin. When air flow only flows from 1 section (either floor, vent, or defrost) it's an indication that the blend door actuator is either stuck or broken.

Jun 02, 2011 | 1998 Ford Explorer

1 Answer

My heater only blows out cold air. When I first turn it on it blows out hot air for about 3 seconds then it turns to cold air. I have flushed the system twice, and that didn't work so I changed the...

check the vacuum lines going to the h-vac (under the dash where the blower motor is) make sure there are no vacuum leaks if there are no leaks start checking the blend door acuators firts locate all of them then start looking for the one that closes and opens the cold and hot blend door. turn the nob to heat and the other one to panel (not a/c panel just air) then if your not sure which one controls the hot and cold blend door start checking to see which acuator has vucuum going to them if there is vucmuum going to them but the acuator does not move replace it.but if it does compress take the rod lose from the blend door and see if the door in side the box is broken. if is not replace the climate controler on the dash. i hope this helps.

Nov 08, 2009 | Dodge Ram 1500 Cars & Trucks

1 Answer

2000 f-350 ac only blows through defrost vents

Sounds like blend/diverter door is not actuating. Check to see if blend door(s) actuate when controls are set. If not pry on blend door(s) to make sure they are not stuck. If fluids (beverage) has spilled on top of dash it can cause door(s) to stick. Also check vacuum lines at door and if necessary at control panel switch locations. If door stuck...clean. If no vacuum in lines trace back to find broken, leaking, or clogged lines.

Aug 11, 2009 | 2000 Ford F350 Super Duty Super Cab

3 Answers

01 silverado blend door changed /now works back wards!!!

most likely needs a LH (bottom) temp actuator. Located in the center of the dash on the bottom, you have to remove the hush panel on the rh side of the truck

Apr 24, 2009 | 2001 Chevrolet Silverado

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