The car has been sitting for four months and was only started periodically and driven around the block once. The air has not been used probably since last summer. It is now not functional. The compressor does not kick on. I checked the fuses for all hvac-related components and all were good. I did not test the relay for the a/c clutch however.
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Re: A/C Compressor not running
IT may be that the climate-control relay is in a open position and/or possible low-pressure switch fault, sometimes dis-connecting the battery for a few minutes will reset the operating modes and/or system.
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As it went for a period of time I suspect that the fuel system has a problem. I take it that it is a diesel being a kubota. When diesel sits unused for a period of time gunk grows in the fuel tank. I suspect that this gunk has now blocked the fuel filter or that there is air in the system that has to be bled out. I would also check that the stop solenoid on the fuel pump is working to allow it to start.
May just be some dirty fuel, or clogged dirty air filter...try putting 2 bottles of fuel injector/carb cleaner in the tank to be sure dirty fuel has been treated. Did your Dynasty sit for a period of time? (Not driven or run for several months, or did you let the fuel tank get very low? Same remedy. Hope this helps..
Sounds like the problem is in the air bag suspension, not the compressor. The air bags shouldn't be losing air when the car sits. The compressor adjusts the suspension level according to the load. The air bags have a valve similar to a blow up raft that allows air to pass through both ways. If when the car is running the compressor is constantly running and not turning off, the issue is within the air bags and/or the air line.
Not sure but you may need to replace the air compressor itself. Mine did that and because of the age of the van it cost too much to repair so we just bypassed the compressor but we had to get a used compressor from a junk yard with no wires to make the belt work. Thirty dollars was cheaper than a four hundred repair job.
they can be hot wired to test if its a switch or it could be the clutch to the compressor. have a freind turn it on and you look at the compressor see if the clutch inguages or not then get back to me and i can help you further.
If it needs and oil change, change it. If you haven't been driving it then no I wouldn't worry about the oil if it looks good. Pull out the dipstick, is the oil honey colored, maybe a little darker like maple syrup? If so it is good, if it is black and runs off the dip stick like water, change it. As said above check your tire pressure. Also check your tranny fluid, when a transmission sits over concrete for extended periods of time it "draws" out fluid, so if there is some spots on the ground I'd check the tranny fluid (People will say I'm crazy but I've seen it happen to the tranny fluid). Also I'd suggest checking the battery wells if your battery has them. Finally I would start the car if possible atleast ten minutes a month while it is sitting in the garage for extended periods, or if it is not going to be driven/started for a while add fuel stablizer to keep your gas good. If everything looks good (four months isn't that long) you are probably ok. If it gets cold where you are, and the garage wasn't heated, and the tank wasn't full of gas add some heat or something to take water out of the tank due to condensation.