BTW, the formula for determining induction motor speed, from power line frequency, and number of poles, is: no-load speed (in rev/min) =2*(60 s/ min)*(frequency)/(number of poles) And this page explains that a little bit:http://www.aosmithmotors.com/motornews/default.aspx?id=568, Answer The most popular service booked by readers of this article is Car surges when air conditioning is on Inspection. 8 years ago, The three fastest possible no-load speeds for a AC induction motor, with a power line frequency of 60 hertz, are: 3600 RPM (for a 2 pole motor) 1800 RPM (for a 4 pole motor) 1200 RPM (for a 6 pole motor) Assuming a "slip" of about 4.2%, those numbers become: 3450 RPM (for a 2 pole motor) 1725 RPM (for a 4 pole motor) 1150 RPM (for a 6 pole motor) Assuming the original motor was a different motor than the one you're using, it might have been a 2-pole, instead of a 4-pole. Look for oil residue around the hose ferrules, fitting connections at the compressor, condenser, and evaporator or expansion device. Optimize fleet uptime and compliance via mobile vehicle repairs, Partner with us to simplify and scale fleet maintenance, Over 25,000 topics, from beginner tips to technical guides, Check cars for recalls, common issues & maintenance costs, Hand-picked, community-rated professionals, Our mechanics make house calls in over 2,000 cities, Explore nationwide job opportunities for automotive technicians, Trusted mechanics, rated by thousands of happy car owners, Fleet maintenance with certified mobile mechanics, Car surges when air conditioning is on Inspection Cost, The statements expressed above are only for informational purposes and should be independently verified. The compressor was fully on and the car just was barely cooling before I began adding the freon into the car – but it certainly was not keeping up and was not cool enough. The average cost for an AC compressor replacement is between $500 and $700 depending on the particular car. Do you think it would be hard on anything to run at 600 RPM's, or should it be ok. Best Answer The car of course started when he got there, but he check under the hood and explained the chip in the key which was probably the problem. How it Works Car AC Compressor Magnetic Coupling Circuit and Wiring Diagram Download for Automotive, Car, Motorcycle, Truck, Audio, Radio, Electronic Devices, Home and House Appliances published on 29 Des, 2020. 1. I think it's a great idea and will use again in the future. … Yo… He took it upon himself to even ride around in my car with me while I pointed out different concerns. I attempted to let refrigerant out, only small amount via gauge only partially engaged. Any AC system requires a refrigerant, such as R-134a. Rencool manufactures DC Voltage Compressors up to 8Kw @ 24 Volt for Mining, Military and Heavy Construction Industries. It does this to offset the power drawn by the air conditioning system. (The only reason I am not giving five stars is due to the fact that no actual repairs were made on my vehicle) I purchased a compressor, designed for maintaining 40 psi in fire sprinkler systems. Air conditioning compressors Compressor kits Complete vehicle air-conditioning checks available Stay cool with ... For a full 3-year warranty on a new AC compressor, ... Natrad are air conditioning compressor suppliers who can also fit a new A/C compressor to your car. What a great friendly person. TBH, keep it well lubricated, and go for it. I believe that an incorrect belt can affect its performance, as well as a number of other things (especially if it hasn't been used in a while, or maintained). Mini Cooper - Water Pump - Santa Ana, California, Pontiac Firebird - Oil is leaking into spark plug well - Orlando, Florida. What Typically Causes the Heating or AC to Stop Working. Diagnosed problem right away and scheduled repair shortly after. The A/C compressor has a clutch which is engaged only when the “A/C” button is switched on. If no obvious leak is found, recover the refrigerant and replace the service ports or valves, evacuate and recharge the system, and add dye in case there is another leak. The labor costs alone are estimated to be just over $200. Your vehicle’s compressor, powered by the serpentine belt, compresses the refrigerant into a liquid, putting it into a high-pressure state. He did a great detailed job on inspecting the car I was looking at possibly buying. AC is cold only when the engine is revving above certain rpm. You would then have the engine run at a constant speed so the "Alternating" part of AC would be a consistent frequency. Hi all, I have a 1997 merc sable, out of the blue the a/c started putting out hot air intermittently. Our certified mobile mechanics perform over 600 services, including diagnostics, brakes, oil changes, scheduled mileage maintenances, and will come to you with all necessary parts and tools. Even a well maintained compressor, sitting for 40+ years will dry out and may have a lot of dust inside etc. Youâll also find that the power drawn from the engine has a more noticeable impact with smaller engines. I mean that would be the way to proceed if you're too chicken to try just doubling the speed, and I do not blame you if want to be cautious. YourMechanic All rights reserved. P.S. © The company that made it is all but lost among all reaches of the internet and around here nobody knows any more than I do about old compressors. Made with ♥ in Silicon Valley. A pressure test with AC on max read into the yellow/red zone. 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