Common solutions for: My AC Won't Turn Off. You are driving your RV under the scorching sun and suddenly realize that the interior has turned into an oven. When refrigerant is still in the compressor, it is considered to be at the beginning of the air conditioning cycle. Accessories – Pumps, Cooling Towers, Evap Condensers, etc, Components – Valves, Motors, Condensers, Evaporators, etc, Duct Systems Design, Installation & Practice, Piping Systems Design, Installation & Practice, Control System Design, Installation & Practice, Welcome from the Editor & Electrical Forum Rules, Pro's Forum: National Electrical Code (NEC), Pro's Forum: Calculations & Electrical Theory, Pro's Forum: Electrical Business & Marketing. Well, it seems that the problem is not totally fixed. You do this by back probing the connector on the compressor. Our 20th year anniversary is May 21, 2020. The compressor in my window AC unit does not turn on. I recently got a 95 240SX SE , wrecked, totally stock, and I am in the process of fixing it before I start with the mods (if I ever do). You can figure out the source of the trouble and fix by yourself if you know where to look into. My problem is that my AC does not work. If not troubleshooted as soon as possible, you will face a jaw-dropping electricity bill, plus your AC will be subject to extra wear and tear from unnecessary over-working. IIRC its the blue relay which is like 12bucks at the dealer. The only way to modulate the pressure produced by the compressor was […] To determine if the thermostat is shorted out, use a multimeter to test it for continuity. Easy. But if it begins to stay stuck 'on' all the time, what do you think the problem could be? If the thermostat has shorted out, it might send continuous voltage to the compressor and cause the compressor to run all the time. If it’s not because of the weather, then AC compressor stays on all the time means there is something wrong with the unit. That didn't fix the problem. HVAC tech just attempted to put on a hard start kit (I think it was a TT6, didn't find it on Grainger's site, I'll check when I get home). Even though the AC is off (AC button off and knob below floor setting), it's acting like it's on. I know you can get it off with the AC still on the car because my mechanic did it to mine. Try swapping the relay with another of the same kind. July 5, 2016, 10:17pm #3. A "shorted" compressor is one with the electrical windings shorted and NOT mechanically stuck. Disconnect the refrigerant lines from the A/C compressor and remove and discard the seals. Caddyman. Got questions about your Nissan? If the engine was running and the clutch was engaged, the compressor was pumping. Anytime a climate control system is set to defrost it engages the compressor. It sounds as if the compressor has indeed 'got stuck'. It really does not provide much other than money in their pocket along with a "one year warranty". This would be due to improper shimming of the clutch disc [pretty rare for that to happen], 240SX Forums | 180SX Forums | Silvia Forums, Sentra Forum / Infiniti G20 Forum / Pulsar / NX Forum, G35 Forum, G37 Forum, G25 Forum, Q40 Forum, G35 and G37 Suspension, Brakes, Wheels and Tires, Nissan / Infiniti Truck, Crossover and SUV Forums, Nissan Pathfinder Forum / Infiniti QX4 Forum, Infiniti FX35 / FX45 / FX37 / FX50 / QX70 Forum, Nissan Tires, Wheels, Brakes and Suspension, SR20DE / SR20VE / SR20DET Forum (front drive). When the switch goes bad, it will no longer be able to measure pressure and will leave the clutch engaged the entire time. Make sure they check everything relating to the non-operating compressor. 2,139 Posts . It could be the relay is hanging on once it is engaged. A "hard starting" "tight" air conditioner compressor will probably draw excessive current (Amps) during startup, so that measurement may be used as part of … Install plugs in, or tape over all of the opened refrigerant line fittings and the compressor ports. They are independent publications and are not affiliated with or endorsed by Nissan or Infiniti. Remove the nuts (1 and 3) that secure the A/C suction line (2) and A/C discharge line (3) to the A/C compressor. A/C compressor stuck "On" Quote; Post by georgeNCSUee » Fri Aug 19, 2005 9:49 am . View Full Version : AC compressor stuck on? I have seen it so many times on vehicles where they just don’t use their AC; however, if your AC compressor doesn’t work, you won’t have cold air coming from your vents. Check for Power. (I just leave it on full auto all the time anyway.) AC Compressor Operation. If the clutch doesn’t work properly, you will still be able to drive your car. This is regardless if the AC button is off or on. Material may not be copied or reprinted without written permission. Hi there! An automobile air conditioner (AC) compressor compresses refrigerant and allows it to circulate through the system, cooling the vehicle. This could be the result of many different causes, both electrical and mechanical. Since my compressor remains engaged even with the controls disconnected, does that mean that the A/C control unit is OK and the problem is somewhere else (like the ECU)? The first and most obvious thing to do when your compressor won’t start is … We're here to help, and it's FREE! The A/C compressor may refuse to start at all, or may be hard-starting depending on when it last ran and what it's temperature is. When an AC compressor won’t turn on, the process can’t begin. Thanks! The stuck clutch fault description doesn't seem to fit; if the AC compressor was turning on and off just fine, then the compressor clutch is not stuck. It will likely cause it to hang up again sometime down the road. BOTH scenarios are bad and can lead to complete failure of the compressor, AND ruin the rest of the A/C system with debris. Compressors may be of a … RULES for AOP - Owner Assistance and Contractors, The ARPA Zone/Open Membership Discussion Forums, Energy Efficiency and Building Performance Discussion NEW, Carnak Zone/Locked Areas - For Professional Member Only, Pro Forum: Refrigerants and EPA regulations **NEW, Pro Forum: Residential Refrigeration and Appliances **NEW, Pro Forum: Equipment Recalls and Bulletins **NEW, Pro's Forum: Building Science Discussions, Educational Forums - Open for all in the industry, Welcome to HVAC-Talk's Educational Forums, How to Submit Links, Articles and Quiz Questions, Frequently Asked Questions About Submissions, Physics, Thermodynamics, Fluid Flow and Combustion, Educational, Training & Reference Information, Manufacturer's Technical Information Links, Electrical Theory, Circuits and Electronics, HVACR Equipment, Components & Accessories, Accessories – Humidifiers, Air Cleaners, HRUs, Fans, Filters, etc. The air compressor still works great when jumped by electric but shuts off as soon as the jumper cables are pulled off. If your car is compatible with R134a type of refrigerant, attaching a can to the system will override the low-pressure switch and restore the normal function of the compressor clutch. Yes... we are 20 years old. jsevinsk. Actually, I do not think it was the relay (yes, it was the blue one). Your "relay option" sounds fishy to say the least. See if that makes a difference. Information Copyright © 2000-2019 by NICOclub, all rights reserved. It sounds as if it is stuck in defrost mode. This switch is located on the metal canister next to the compressor. And when the A/C controls are disconnected, the compressor should be disengaged, right? If you saw smoke coming from the belt, then either the a/c compressor clutch was engaged or the clutch was seized to the compressor shaft. The #1 question asked by NEW MEMBERS. less of a load on the relay. I'd still get a 2nd opinion from a reputable firm on compressor!! It will spin freely until you turn the air conditioning on. It will buzz for about 5 seconds then click off. AC Compressor stuck on until engine turned off... Jump to Latest Follow ... but when I put it back into the standard floor vents or dash vents only positions the ac compressor will continue to stay on (I can hear and feel it when at a stop). Discussion Starter • #1 • Sep 11, 2006. Components – Coils, Heaters, Motors, etc. Freeing a seized AC compressor involves determining what caused the seize and performing the necessary repairs. It may very well be the clutch disc is dragging on the clutch assembly allowing it to stay engauged. Check these 5 things before calling a professional for air conditioner repair. The relay was the problem even though I measured it and all. 01-31-2007, 04:42 PM. A seized AC compressor causes the AC to malfunction. Postby georgeNCSUee » Fri Aug 19, 2005 9:49 am, Postby NISTECH » Fri Aug 19, 2005 2:37 pm, Postby georgeNCSUee » Sat Aug 20, 2005 8:21 am, Postby NISTECH » Sun Aug 21, 2005 3:12 am, Postby georgeNCSUee » Wed Aug 24, 2005 5:17 pm, Postby NISTECH » Wed Aug 24, 2005 7:04 pm, Postby georgeNCSUee » Fri Aug 26, 2005 7:04 pm, Postby NISTECH » Sat Aug 27, 2005 3:30 am. There's something weird that's been happening with my VUE for the last couple of weeks. Now, after I turn off the A/C, the clutch remains engaged for a little while but after that it disengages. The reason is because there is no power going to the Air Compressor. His next two options are to replace the compressor or replace the whole system. The thing is, I not sure if it's starting to get stuck again or if whatever part was causing the problem in the first place is returning to normal operation. Compressor on the outside AC unit stuck. I am going to further monitor this to see if the 'stuck time' get longer or shorter. If your car’s ac compressor goes bad or fails over time, your engine can seize due to the stuck compressor. How to manually engage AC compressor clutch when the system is low on antifreeze? One common mechanical cause is a stuck piston. If a serpentine belt goes around an a/c compressor clutch pulley and the compressor is locked up, it is okay to have the belt as long as the a/c compressor clutch is not activated. Ideas? Any idea which component of the system would cause that problem? Your window mounted air conditioner has a reset button mounted near the power cord that makes the entire air conditioner go back to factory defaults, including the air compressor. The low-pressure switch tells the car that the clutch needs to engage and disengage and will shut off the A/C compressor. Gain access to our free AOP (Ask a Professional) Section to get real answers for your questions. Stuck compressor generally refers to a compressor that is simply stuck and won't start. Upon a close inspection, it seems that the RV air conditioner compressor not coming on.The performance of the AC system depends on its components and the compressor is a vital one. Forget it. Your gonna have to see if the compressor is actually getting a voltage when it is stuck. In earlier air conditioning systems, the compressor ran at full capacity whenever its cycling clutch was engaged. One of the common problems found while troubleshooting reciprocating compressors is that they simply fail to start. I think we need a better understanding of what the mechanic found. There are several different compressor designs, but all perform the same function: they move, or pump the refrigerant throughout the system, and they compress the low pressure vaporized refrigerant into a high pressure vapor. well to me it sounds like the ac compressor is shot. Right on, man! Just adding refrigerant will solve this problem. 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