The average cost for an AC compressor replacement is between $500 and $700 depending on the particular car. Honda Accord - Car surges when air conditioning is on - Woodbridge, Virginia. George_San_Jose1 March 16, 2017, 3:13am #3. He was on time and very knowledgeable. Chris was very conscientious about arriving on time, he ran into some traffic but kept me informed on his arrival time. Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST. The most popular service booked by readers of this article is Car surges when air conditioning is on Inspection. He seemed very personable and professional. It's most evident with the A/C compressor as this has is one of the biggest drains on the system in terms of additional equipment. 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. Your Account . One of the most important is the AC thermistor. Additionally, he made a recommendation or two about the maintenance of my vehicle. Brandon was very helpful, quick and knowledgeable. The MD-18 Series is a DC Electric Air Conditioning Compressor unit Powered by 12 & … It was 2hp and ran at 1000rpm, what I needed to use it in my shop was 100psi, since I did not want to change the motor to something bigger, I decreased the rpm to 850 with a smaller motor pulley and got my 100PSI. So instead of an inverter, I believe a small portion of electricity will be converted to DC, while AC (naturally produced by a generator) could be used to drive the wheels, a/c compressor, etc. Also I am guessing that twice the current speed is the fastest it could have possibly run, based on my previous reasoning of 3600 RPM being the fastest possible speed for an AC induction motor. If you turn on the air conditioning and stand in front of the car and listen to the engine you will hear the AC compressor clicking every few seconds as it engages and disengages. Hi all, I have a 1997 merc sable, out of the blue the a/c started putting out hot air intermittently. He did a great detailed job on inspecting the car I was looking at possibly buying. To properly to check the refrigerant charge of an AC system for an automobile, the engine has to be at operating temperature, the idle at 2,000m RPM’s, with a large fan blowing at the condenser/radiator. It also depends on your acceleration and the year (most cars manufactured after 2000 have a relay that shuts off air conditioning at WOT (wide open throttle)) to ensure ample power for the engine under hard acceleration. You see the same thing to a lesser extent when turning on other systems on the car such as the heated rear screen. How Does a Car’s Air Conditioning Work? You would then have the engine run at a constant speed so the "Alternating" part of AC would be a consistent frequency. Yo… Failing that, I would take it in to someone who's knowledgable with older air compressors and have it fully inspected and serviced. It was maintained great and stuff, but hasn't been run for 40+ years. Car AC Compressor, Discharge Pressure: 12 To 18 Bar, Maximum Flow Rate (CFM): 501 To 1000 Cfm ₹ 14,800/ Unit Get Latest Price Compressor Technology : Reciprocating Compressor 8 years ago. 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. It does this to offset the power drawn by the air conditioning system. A typical motor running on 60Hz American power will spin at close to 3,600 RPM, whereas the same motor operating on the same voltage but on 50 Hz European/rest-of-the-world power will run slower, at around 3,000 RPM. I purchased a compressor, designed for maintaining 40 psi in fire sprinkler systems. In electric vehicles, the A/C compressor is driven by an electric motor and runs at a constant RPM only when the A/C is switched on. Mazda 2 - Car is not starting - Westminster, California. If you can find the manufacture of the compressor, they might spec the max RPM allowable. This then causes the RPM to jump back up again and then settle to a comfortable idle speed. In that case the motor speed should be 3450 RPM, not 1725 RPM. Above 1200 RPM, efficiency rapidly increases; at operating speeds of 1800 to 2400 RPM it is about the most efficient pump on the market. Got home and began to slowly put the R-134a into the car air conditioner system with the AC turned on and the temperature set fully to cold and the blower fully on. We actually talked about different things, and he seemed responsive to my questions. If you drive a subcompact with a small four-cylinder engine, your engine will be much more affected during AC operation than a big block V8 engine, even if the amount of power drawn by the air conditioner is identical between the two cars. V belts are MUCH higher power rating than flat belts. I am guessing it would be ok at 600 RPM. The reading only went higher. AC is cold only when the engine is revving above certain rpm. Fast, free online quotes for your car repair. I definitely recommend him. I attempted to let refrigerant out, only small amount via gauge only partially engaged. Bad ac compressor gauge readings. 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 … Once the problem has been diagnosed, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. The ABS Light being on indicates a fault in the ABS system, wheel speed sensors and or solenoid... Hello. If you run it twice as fast as you're running it now, it will take 12+ minutes to pump up, right? Last week i was finally able to recharge the ac and put refrigerant in it. My Ac cools but only at high RPM. Ramdev Cool Spares - Offering Car A/c Compressor, Car AC Compressor, Automobile AC Compressor, Vehicle AC Compressor, ऑटो एसी कंप्रेसर at Rs 9800/piece in Chennai, Tamil Nadu. It is natural for your car A/C compressor to cycle on and off. Emmette was great! It came to Colorado brand new and has been here ever since. When at a stop, the air is warm…but if I put it into neutral and rev the engine to, let’s say, 2000+ rpm, AC gets colder…or when Im driving, obviously. On older cars yes, but modern cars the compressor unit has a freewheel electric clutch and is locked onto the rest of the vehicle by the serpentine belt. Maybe some successively smaller pulleys? I will be utilizing the services of "Your Mechanic" again. It does this to offset the power drawn by the air conditioning system. Over a certain number of years, this stress will wear down the compressor and cause it to eventually malfunction. Bad Car AC Compressor Symptoms. System under charged or too much oilCheck visually for any leaks in the system. Replaced the AC compressor. It takes 25+ minutes to pump up, I am not satisfied at all. As to the question of how much power it draws, there’s no one answer, as it depends on the make and model, the engine, the condition of the engine and the air conditioning system and much more. 6000RPM R134A automotive air conditioning 24v 12v electric car ac compressor, US $ 300 - 500 / Piece, 12v dc compressor, 207.7*120.8*179.7mm, 1 year.Source from … It sounds like you may have a severe oil leak that caused the oil burning smell. The first thing I would check is to see if the battery is in good condition, properly charged, and able to pass a load test. compared to my little single stage one, but it isn't even close. As the physical switch controlling AC, common signs include overheating AC parts, certain settings not working, or the AC compressor not turning on. The oil light illuminates due to a loss of oil pressure in the engine. With the gauge connected and revving the engine the reading lowered into the yellow. Most cars these days come with air conditioning as a standard feature – gone are the days when it was an expensive extra (for most of us, anyway). Please see our, Dodge Caravan - Car surges when air conditioning is on - Orlando, Florida, Jamahl was Professional, courteous, and friendly, Toyota Corolla - Check Engine Light is on - Deltona, Florida. What I would suggest you do is get a service manual for it (if you haven't already). Honda Accord - Brake Pads Replacement (Front, Rear) - Orlando, Florida. A car ac compressor failure will not engage if the ac compressor is bad or failing, and can lead to skipping and loud noises coming from the belt. I mean if the thing is running, and the motor is not turning so slowly as to make it stall, and it is not running too fast, then maybe it's all good. How to Take the Pressure ReadingsFor example: with the engine off and AC not run for at least an hour, a 70° your readings should After compressor disengagement, the rise in suction side pressure will usually be very slow. Vehicle Info: 93' Merc. 800-401-6762 Support Center FREE SHIPPING On Orders Over $99 . Emmette came out and did an inspection on my car. The RPM's are a complete guess based upon the 1725 RPM motor average. You’ve likely noticed your car’s engine RPMs increasing at idle when the compressor kicks on. A pressure test with AC on max read into the yellow/red zone. 1998 Honda CRV. YourMechanic All rights reserved. Diagnosed problem right away and scheduled repair shortly after. 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. Rencool manufactures DC Voltage Compressors up to 8Kw @ 24 Volt for Mining, Military and Heavy Construction Industries. What a great friendly person. I have a 2000 mercury sable LS sedan. He is going to try and get me a credit since the car started and gave me a coupon discount. When engaged, the compressor turns at a rate proportional to engine speed. Your vehicle’s compressor, powered by the serpentine belt, compresses the refrigerant into a liquid, putting it into a high-pressure state. I was thinking about why a mechanic can't come to the car as I prepared to call AAA for a tow when I found this web sight. Made with ♥ in Silicon Valley. You’ll also find that the power drawn from the engine has a more noticeable impact with smaller engines. I mean a car engine is basically an air pump(a single stage kind), and those run at a few thousand RPM. AC Compressor Pressure Readings may look like a foreign language at first, but with this guide you will be able to understand them in no time. Tester. If you are using the same motor as before, then I can't guess at a reason for the suspected slowness. Especially since you say you spent a lot of money on this compressor. If you are low on refrigerant, it leaked out somewhere. Any AC system requires a refrigerant, such as R-134a. 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. However, the AC is powered by your engine – the serpentine belt that runs your alternator, water pump, power steering pump and other accessories also turns the pulley for the AC compressor/clutch. You’ve likely noticed your car’s engine RPMs increasing at idle when the compressor kicks on. 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 So it won't cause any damage by being turned on at speed. - Woodbridge, Virginia be hard on anything to run at `` your Mechanic '' again up... How long it stays engaged is determined by pressure switches in the future suggest you do get... The heated rear screen impact with smaller engines Sanden an almost ideal performance compressor you may have severe... You see the same thing to a comfortable idle speed engaged, the company that built it custom. Pre-Purchase car Inspection - Stafford, Virginia AC and put refrigerant in it the forums retiring... 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