1989 S10 Blazer air conditioning problem

No hot air or no airflow at all ?

A mechanic would check to see if the system is full of freon, then check for voltage at the relay, the low pressure switch, and the ac clutch.

there is a vacuum diagrsm maby it will help u

my 89 s10 blazer's air conditioner compressor clicks on an d off...what is the problem?

the bolt on the cv halfshaft but sounds like you lost a wheel bearing if you loose the bearing the shaft can pull out

You really want to troubleshoot your AC. Here are some items to follow:
1- Make sure your Compressor clutch work first. You can jump the wire to test it when the engine is off.
When you know the clutch work then you can look for the other things not makeing it activated.
2- It it doesn't work then you know the problem right there.
3- If it works then check the Low and high pressure according to compressor spec.
3- Check your engine temperature sensor. Don't think that your temp reading gauge is coorect then your engine temperature for your AC is working.
4- Check your compressor sensor speed. It has to be in sych with your crankshaft sensor before it allows the clutch engaged to prevent burning your compressor when it is locked up is in freezing mode ( ex.in case some clever people jumping wire to control the clutch bypassing all other rerquirement).
5- If you think these items need to be addressed by professional better then do-it yourself then I have no objection. Good luck on trying.

being that it a dodge product they probably have used a vacuum based motor to switch where the air comes from. If this is the case then you must have leak somewhere. These are not easy to find they can take a lot of time or be quick it depends on the leak. to clarify does the heat or vent come out the top? is it supposed to?

That black box is likely the canister vent solenoid.

you have a bad control switch.

I have an 89 s10 blazer with the 4.3 tbi. the oil filter is a remote oil filter. there are two hoses running from the engine to the filter, which is located in the engine compartment in front of the left front wheel. it's mounted to the side.