Normally wouldengage with A.C use or on defrost mode but does not engage at all.
There are a few reasons for the compressor not engaging. Lets start with the most common. low ac gas.A bad clutch on the compressor.Blown fuse.
Let is start with testing for low gas. (134a freon).Locate the dryer. this is on the passenger side of engine compartment. it looks like a tall cylinder, on the top side you will see a switch. unplug switch connector and jump the two terminals in connector with a piece of wire, this is the low pressure or cycling switch. you will be completing the circuit by jumping a wire across the terminals.If the compressor turns on when connectors are jumped then you are low on gas and the system needs recharging.
If the compressor does not urn on then check all fuses, if fuses are good then the next step is to go to compressor and test for power and ground. If you have power and a good ground on the connector to compressor then compressor clutch is bad.A bad clutch will some times blown fuses, so if you replace the fuse because it was blown and it blows again then clutch is bad.
Another test that will help is when you remove the connector from the cycling low pressure switch , test the connector. one wire on the connector should have power when ac is turned on,
Hope this helps let me know what the outcome is. Good day.
I have enclosed a picture of the switch and dryer to help you locate it.If you jump the terminals
SOURCE: how do i get the
place a jumper wire between terminals A and B of the diagnostic connector , located just under the steering column,pointing staight out. Turn the key on and after the initial 12 code ( flash ,pause, flash,flash), you can count the flashes to retrieve the error codes. ex. *** ** equals 32. each code will show 3 times . When 12 returns , you have retrieved all the stored codes. Good Luck.
SOURCE: astro van 1997
There is a flap in your heater box that is controled by your vent switch by your heater controls. listen for a vacuum leak. that is common and hopfully the problem. there is vacuum lines that control the vent door that redirects the air to your vents.
Has your dash been messed with recently? if so i would check there first. you should hear a hissing if thats the problem.
Otherwise these also are common for that door flap to break and not switch NE more. thats the only 2 things that i can think of off th wtop of my head to be the problem. this would require the whole dash to come apart if its this problem
Michael
ASE certified
SOURCE: Astro Van is running rough
Mixing two different oils wouldn't matter, but 10W40 is way too viscous for that engine. Replace that with 10W30 asap. The first number is the cold cranking weight, the second number is the weight at operating temperature. 10w40 gets worse for that engine as it approaches operating temp.
SOURCE: acc positions on ignition switch will not work on 95 Chevy Astro
ignition switch not lock cylinder may need to be addjusted it's on top side of steering column under dash
SOURCE: MY 95 ASTRO VANS BLOWER MOTOR SWITCH DOESN'T WORK
More then likely it's a resistor block, they tend to fail one step at a time like your's is.
The block is up under the dash, unfortuneately I can't show you, but your local garage, depending on whee you live shoudn't charge over $150 for the job, always ask for an estimate. Then check other garages to verify the cost.
I hope this helps you out.
Thanks for letting FixYa.com...fix ya
Terry
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