You’ll know once they’re broken, as they will cause the whole air conditioner system to act out. Please enable Cookies and reload the page. As the pressure switches control the on/off function of the AC compressor, a switch failure can prevent the AC compressor from functioning at all. Disconnect the negative battery cable with a wrench of ratchet.

How to Put Refrigerant in a 2000 Ford ... How to Troubleshoot a Sunfire Radiator ... How to Troubleshoot Air Conditioning in ... Klimaanlage pkw image by crossgolfing from. Part 2 of 3: Remove the A/C pressure switch. Set the resistance range to 'x1.' A closed switch should read 0 Ohms. %PDF-1.4 As I mentioned, this 1992 motorhome was retrofitted from R12 to 134a at some point. If you are draining and starting from scratch, it doesn't matter if you are adding, better not to mix type. Although there are different types of pressure switches, they all work the same in principle, and testing them with your digital multimeter will look the same. Open the doors to the vehicle, preventing the air conditioning from cycling off. The first part of the testing process stays the same. endobj

For more results, apply pressure with the hand pump and read the pressure gauge to get a better idea of what to fix or improve about the pressure switch. Four Seasons’ trinary switch part numbers are 35889 and 35901. Or does it kick the compressor off when a set high pressure is reached? 2) high pressure cut-out, shuts off the compressor if the high side is too high to prevent blowing a hose or opening the blow-off valve on the compressor if so equipped, and 3) it controls a fan for the condenser if the high side pressure rises to about 275 PSI. Well, it's definitely an expansion valve system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ind out more about A/C pressure switches in this video: Now, let’s find out how to test a pressure switch with a multimeter. This protects the compressor from damage.

Hello, I'm wiring up my Vintage Air Gen II Supercooler. Although replacing a pressure switch is quite a technical job, testing a pressure switch and pinpointing the real problems with your air conditioner is something you can easily do yourself with a multimeter.

Some multimeters offer special accessories that help you with specific problems. I added about an ounce of oil. The compressor is what pumps refrigerant through the entire system. It’s a great multimeter.

If you see ‘infinity’, you’re indeed working with a faulty switch. Yes, but it is not easy, you need to apply pressure and test for continuity between the terminals.

Remember that actually fixing a pressure switch can be very tricky. At the same time, testing the pressure switch is an easy way to eliminate more elaborate problems with your air conditioner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hen set it aside. Tech Video: Installing a Trinary Switch Posted on June 10, 2017, 2:19 am, by Ryan Zwicker, under Tech Video In this video, Vintage Air Vice President Rick Love discusses the importance of safety switches while walking through the process of installing a trinary switch as part of a … The meter should show continuity. If not, replace the pressure switch. Listing both refrigerants makes me think the switch could work with either system.

The sticker is completely unreadable.

Refrigerant does not wear out or evaporate: only leaking air conditioning … It only had one set of wires on it, one of which runs to the compressor clutch. Select the ohm meter function. If the sensor's electrical connection is working correctly, the multimeter should read between 4.0 to 5.0 volts. This article was written by the It Still Works team, copy edited and fact checked through a multi-point auditing system, in efforts to ensure our readers only receive the best information. If you don’t see any terminals, there is a chance you need to remove the cover first. There needs to be enough pressure to "turn on" the compressor. Turn on the multimeter. This page was generated at 1 minute ago.

Your email address will not be published. Note that the Trinary Switch will turn on the Radiator Cooling Fan by grounding the Power Center Temp Sw terminal as soon as the refrigerant pressure gets high enough. When a certain pressure is reached, the switch will activate and pause or stop the electrical circuit that the pressure switch is a part of. Turn the air conditioning system on. try spraying the condenser with water while watching the pressures and vent temp. If the air conditioning pressure sensor or switch is faulty, then the OBD II code will relay that information to you through the scanner.

AC systems in vehicles run with a pressure switch. /Length 13356 This gives you the initial test results. Your browser will redirect to your requested content shortly. How to Replace the Crankshaft Sensor in ... What Are the Symptoms of an MAF Sensor ... How to Replace the Oxygen Sensor on a ... Hemera Technologies/ Images, Copyright 2020 Leaf Group Ltd. / Leaf Group Media, How to Recharge Your Car's Air Conditioner. One might wonder how to jump 3 wire ac pressure switch by own.

Plug the switch in. That helps. This means that once the component (a pressure switch in this case) is disconnected from the main body (the A/C unit in this case), you can test the pressure switch as you would any switch. /Creator (��%����qd2Z%v��\\��c��J�&) btw, i have jumped that switch, in 2 prong config, on multiple makes, and ECU never had any issues with me doing this. Trial, yes, but hopefully not too much error! Most of the time, it is easier, cheaper and faster to just replace a faulty pressure switch. Place the leads of the multi-meter, set to ohms, on the prongs found on the pressure switch. Remove the air conditioning pressure sensor and test the electrical connection leading to the sensor from your vehicle's electrical harness. If not, repair the leak and add refrigerant.

Thank you for the explanation. This article discusses how to test a switch with an ohm meter. Place one lead against the vehicle frame and the other lead into the plug openings, one at a time. Login is located in the upper right corner of all pages. /CreationDate (��q�U��?urgh��\n��0K�) Maybe somebody could post it or a link. If the AC pressure switch is bypassed, then the compressor can potentially freeze up from a lack of fluid and lubrication, requiring expensive work to be done by a professional mechanic. %���� Check the voltage going to the plug with the multi-meter turned to DC-Volts. And yes, I did replace the drier. Any sensor codes that come up on the OBD II scanner can either be read directly off of the scanner or you can look up the code on a website such as OBD II Code or AutoZone.

Touch the probes of the multimeter to the electrical harness end of the electrical connection and turn the ignition key to the accessories position. Required fields are marked *. This means that once the component (a pressure switch in this case) is disconnected from the main body (the A/C unit in this case), you can test the pressure switch as you would any switch. System is nice and tight, holding vacuuming perfectly. You might have to do some repairs by yourself to make it run correctly again. And the electric fans spliced into it. I did that to mine while I was replacing all the o-rings in the system. You disconnect the wire connector at the compressor and put a lead to the battery to see if the clutch engages. Locate the evaporator, which is a block or grille-type component connected via hoses and tubes from the compressor, which has a belt and pulley system. /Producer (��%����qdqji��m��d��OS�,$�ۻsK5 ���:P�) Insert a jumper wire into the two openings of the plug. If the air conditioning pressure sensor or switch is faulty, then the OBD II code will relay that information to you through the scanner. That is called a "trinary" switch. The trinary pressure switch is working as it should.

Amount: depends on the compressor, What compressor does it have?

One opening should read between 12 and 14 volts. 1) is low pressure cut out that shuts off the compressor when the system is low. I've had it for a year and a half, and this year I am trying to get the AC to work. An automotive air conditioner's pressure switch cycles the vehicle's compressor on and off when the refrigerant pressure falls below an acceptable level. Place a lead on each fuse terminal. High pressure side would rise to 250, and then the fan would kick in, as it should.

AC systems in vehicles run with a pressure switch. I don't know about amount, without a sticker, try and contact the Mfg, otherwise its going to be trial and error. You can jump three-wire AC pressure switch to control the AC system as well. In most models, you will be able to remove the switch separately from the A/C itself, so you don’t have to take out the whole A/C. If the pressure is at an adequate level, then your pressure sensor may be failing. This not only signals the need for a recharge of refrigerant, but also saves the compressor from running without the proper lubrication. you didnt need to test the pressure switch, you need to test the compressor clutch. As I'm getting ready to re-charge the system, one question remains: How can I know what type of oil to use in the system and how much, and also, how much refrigerant to use? Put one of your leads on the common terminal, and the other on the normally open terminal. I was expecting it to read 25-35. Low pressure side, however, was reading about 50 or so, and staying right there. This process is automatic. -�r��r7iá+�זj2�?��r�v�e�6\[���������1_��e�3 y@�)�(#JBTh�=�D[�aI []))), +((!+[]+(!![])+!![]+!![]+!![]+!![]+!![]+!![]+[])+(!+[]+(!![])+!![])+(!+[]+(!![])+!![]+!![]+!![]+!![]+!![]+!![])+(!+[]-(!![]))+(!+[]+(!![])+!![]+!![])+(+!![])+(!+[]+(!![])+!![]+!![]+!![]+!![])+(!+[]+(!![])+!![]+!![])+(!+[]+(!![])+!![]+!![]+!![]+!![]+!![]))/+((!+[]+(!![])+!![]+!![]+!![]+!![]+!![]+[])+(!+[]+(!![])+!![]+!![]+!![]+!![]+!![]+!![])+(!+[]+(!![])+!![]+!![]+!![]+!![])+(!+[]+(!![])-[])+(!+[]+(!![])+!![]+!![]+!![]+!![]+!![])+(!+[]-(!![]))+(!+[]+(!![])+!![]+!![])+(!+[]+(!![])+!![]+!![]+!![]+!![]+!![]+!![]+!![])+(!+[]+(!![])+!![]+!!

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