Question about 1991 Chevrolet Cavalier

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1991 cavalier vl model diverter dor for vent,heat,defrost. not working is this controled by cable or is it a vac controlled system thank,s

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No look for vacum hose under hood that runs into fire wall, make sure it has vacum, if no vacum add vaum to it.

Posted on Dec 10, 2009

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Posted on Jan 02, 2017

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What diverts air to defrost. Air comes out vents and floor. ac works and heat , but won't go up to dash vents. The flaps are working.


You just THINK the flaps are working, but apparently the top vent is not. These multiple flaps are controlled by vacuum and you have a line off to that particular flap. This means the flap won't open and the vacuum leak, whether you can hear it or not, is making you lose MPG also, though slight. The vacuum line could be cracked or disconnected from the flap or at the vacuum block on the back of the lever unit.

Aug 18, 2014 | Cars & Trucks

1 Answer

Removing actuator from 05 cavalier


AC Actuator ?
The temperature control regulates the HVAC system air temperature in any mode. A temperature control cable mechanically links the temperature control to the temperature door. Your hearing stuff inside the blower motor housing , like leafs or someother de·bris .

Because your vehicle has no electric actuator .
Disconnect the electrical connections from the blower motor.
Remove the blower motor retaining heat stakes with a chisel or a screwdriver.

Apr 03, 2017 | 2005 Chevrolet Cavalier Coupe

1 Answer

I have a 1991 tempo and the vents on das h don't work defroster and heat to floor work great but not the vents


All the vents are connected, a vacuum controlled flap diverts the air to each area.

With that said I would say that either the vents are obstructed by something like a rat/mouse nest or that your vacuum controlled flap is stuck or does not have enough vacuum to move it.

A vacuum leak will sound like a constant hissing sound.

May 04, 2010 | 1991 Ford Tempo 4 Door

2 Answers

2003 Grand Prix not blowing hot air. Does the heater coil need to be replaced? If so where is it located?


If the heater coil was bad, it would be leaking radiator fluid... probably into your dash/floorboard (depending on where it is installed in your model car). There is a switch that diverts the hot radiator fluid through the heater coil when you want heat. There is also an air diverter valve that helps to mix the hot and cold air. The fluid valve is controlled by the A/C settings control. The one that you use to choose between heater/air conditioner/vent/ defrost. The air diverter is controlled by the temp mixing controller. The most simple explanation is that one of those valves or the controller of one of those valves is not working. If the hot water cant be diverted through the heater coil, the coil can't exchange the heat (warming the air). If the air diverter (hot/cold controller) cant move to add heat, then all you will feel is air from the vent side (from outside) or from the A/C cooling the air.

I would guess that its either a controller or one of the valves themselves. Odds are, it is a controller. That tends to be what malfunctions first.

Feb 25, 2010 | 2003 Pontiac Grand Prix

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

CANT ADJSUT THE CONTROL ON HEATER AND AIR


The controls for your heater/vent selection is inside the dash, behind the control switches you use to select the vents the heat/AC will come out.
When you move the selection levers, there's a few things that happen. Vacuum is applied to the doors (which are inside) and they open or they work using cables to move the doors or both. The different doors open, directing air flow to the vents selected.
Remove the controls from the dash (which should just be removing some screws, maybe a few small pieces of dash and pulling it out). The controls will be connected inside so they will not come out very far.
Just check to see if anything is disconnected and try operateing the controls with the heat on to see how they work.
Sometimes they just stick or the doors stick. This system is the way the 1991 models worked but since they are the exact same, it should be this way also.
Look it up in some sort of repair manual for more info. I find with these trucks, they don't heat very well using the front vents anyway. I find using the bottom vents work best for heat unless you need defrost.
The "heater" selection will atomatically use the bottom vents, "bi-level" AC will use the front and bottom vents if I remember right and regular AC will automatically use the front vents. For the trouble in removing these controls (the whole dash would need to be removed for repair) I probably would just live with the way they work if they do work atleast properly (enough heat and AC). If you find that you don't get enough heat or AC when in use, check the cooling system for proper operation and blockages/mineral buildup and check the AC system incase it needs recharging or you have leaks.

Apr 12, 2009 | 1992 GMC Sonoma

2 Answers

'04 Jeep Grand Cherokee: Heats...but only through defrost vents.


Check the control cable that operates the diverter door in the heater box at both ends, to make sure that it operates the door when you move the control lever.

Jan 15, 2009 | 2000 Jeep Grand Cherokee

1 Answer

Blend door not working.


check the vacuum supply and vac lines from the control head for a leak

Oct 08, 2008 | 2001 Dodge Ram 1500 Truck 2WD

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