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Are all the vents working? Does your Cruise Control work (properly) it may work and shut off. If your vents are working is only hot air or cold air coming thru, or just your defroster vent?
You have a 3 way check valve under fuel rail guard on passengers side, its a pastic barrel shape thing it rots and creates holes in it causing your ac vents and cruise control to malfunction.
next your heater control unit if you have the one with a slider to regulate the hot or cold temperature breaks easily inside unit, its only plastic. Its an arm inside unit to control the temp in car it slides a door open or closed for heat. If you look where he slider enters thru that hole space you will see a post it sits on to open and close .
If your vents are in the floor, you need to inspect your return air ductwork, you may have some air leaks pulling hot attic air in thru the vents. If the supply vents are in the floor, the return duct may run through your attic, if the duct work is uninsulated or pulled apart, it will pull hot air thru the return, causing a mixture of cold and hot air, giving you a warm air movement through the ductwork. Many service men will not catch this problem. You need to turn the unit on, go up in the attic and visibly inspect the entire return air. I hope this helps you. mark
Not exactly....if you can half or more of the side vent exsposed then you will be okay...I like the side vent models because they are less prone to recycling the air...they either pull in the side and expell out the back or visa versa...
On the total back models all the air is just pulling and pushed out the back and they are prone to overheating in some wind conditions...the air just recycles...
Of course the main problem is that most people fail to keep their unit cleaned properly and that causes the overheating...
There is a flap that directs the air. the flap is controlled by a vacuum actuator. This is located inside the venting. The actuator is connected to little vacuum hoses that attach to the temperature control switch. Either the flap is stuck, or the actuator has gone bad.
There is a baffle/damper that allows outside fresh air to flow through the unit. This is only supposed to be open in cooling mode when the outside temp is moderate, or whenever you want just fresh air and fan operation.
Find the lever that controlls the baffle.
Some units have a switch in the control panel for this.
so you mean the vents in the refer/frezer sections? yes ok there is a fan in the frezer section that moves the air thru out the box.its called the evaporator fan.you should hear a vissssss sound when you open the doors.some boxes you have to push the door switch closed with finger because fan goes off win door open.test fan with volt meter,should get 110 volts[may have to push that door switch in when testing]if voltage and not turning get new fan.hope that helps God bless ,tom