On the PTC relay, all of the pairs at any combination read 10 ohms. Thanks to all authors for creating a page that has been read 191,601 times. Please connect starting capacitor of 5mfd, 400volt parallel to ptc relay. If so, loosen the screw with a screwdriver before pulling the wire out of place. Position the relay where the two female terminals are on a work surface, with the male terminal on the side facing down. Is this correct? Since there is a lot of wire in windings, the compressor can be extremely hot. This article was co-authored by our trained team of editors and researchers who validated it for accuracy and comprehensiveness. This image may not be used by other entities without the express written consent of wikiHow, Inc.
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\u00a9 2020 wikiHow, Inc. All rights reserved. Flip the relay back over to its original position. wikiHow marks an article as reader-approved once it receives enough positive feedback. Most high load or heavy load applications have this start then run mode. When it is necessary to make a change, do not try to improvise or make use of not recommended solutions. Fit the relay and press to fasten it in the compressor. 4. This image is not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. The display on a digital multimeter should read zero, or the needle should sweep across the face of the display to zero on the far right on an analog multimeter. To find out how to replace your PTC relay, keep reading! Either you have a bad connection somewhere in your wiring, including your plug for the refrigerator, or your compressor is internally dragging, causing a high amp load. It rarely breaks down due to not having many moving parts. If there is, change the relay. Use the prongs that are horizontally across from one another for the first measurement. You cannot. At ambient temperature, the values should be near those presented in the list below: Relay PTC– Relay PTC 8EA 1B1X – 2.8 to 5.2 Ω; – Relay PTC 7M4R7XXX / 8M4R7XXX / 8EA14CX– 3.8 to 5.6 Ω; – Relay PTC 8EA4BX / 8EA3BX / 8EA21CX – 3.5 to 6.5 Ω; – Relay PTC 8EA5BX – 14 to 26 Ω; – Relay PTC 7M220XXX / 8M220XXX / 8EA17CX – 17.6 to 26.4 Ω. Turn off the water supply to the ice maker and use an adjustable wrench to remove the supply line from the water valve. My 10 year old Whirlpool refrigerator runs great for about 24 hours, but then stops running. Then, use a multimeter to check the relay for open resistance. Check supply voltage. Step 1: With the relay in any position, check if there is continuity between terminals 1 and 2 of the relay. The PTC relay starts the compressor inside the fridge to make cold air so your food stays cool. There's a pretty simple shake test you can try to see if your relay is bad. This image is not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. Writing is dedicated to assist mechanics in their learning about it. Use a screwdriver to remove the small access panel on the back and look for the compressor inside your fridge, which will be a large black cylinder on either side of the machine. The refrigerator does not works the whole time. Step 2: With the relay in the vertical position, coil of the relay upwards, check if there is continuity between terminals 1 and 3 of the relay. https://www.foodsafety.gov/food-safety-charts/food-safety-during-power-outage, https://www.sciencebuddies.org/science-fair-projects/references/how-to-use-a-multimeter, consider supporting our work with a contribution to wikiHow. Include your email address to get a message when this question is answered. I unplug it and plug it right back in and it runs great for another 24 hours. A refrigerator requires a compressor to keep the interior cold. If the windings don't burn up, there will be current causing heat to be in the wiring. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. Try testing the compressor before getting a new PTC relay to make sure it’s not the cause of the problem. Find out more, Choose The Air Conditioner’s Ideal Settings. This image is not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. If your refrigerator stops producing cold air, there may be something wrong with the PTC (positive temperature coefficient) relay, also known as the start relay. Before replacing it by a new start relay, do the test to discover if it really is the part which has a problem. This image may not be used by other entities without the express written consent of wikiHow, Inc.
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\u00a9 2020 wikiHow, Inc. All rights reserved. If the relay still works, you may also need to check the compressor to make sure it’s still functioning. If relay goes faulty, will the compressor will be hot or not? How to change the start relay As already mentioned, there are different types of relays. You do not have to remove the entire back of your fridge. The resistance between the 2 prongs will vary depending on the fridge model and compressor. If the compressor still works, then there may be a problem with the internal fan. Then, replace the panel, plug in your fridge, and test it out. The PTC relay starts the compressor inside the fridge to make cold air so your food stays cool. Grab the relay with your fingers. By using this site you are aware of the Terms of Use and Privacy Policy. When the metal piece comes into contact with the ports, it closes the line and creates 0 Ω of resistance. Tip: Use a toothbrush to clean any dust from around the ports if the reading didn’t change, and then take another reading. Avoid opening the doors to prevent it from heating up faster. But, when it does, some bad starter relay symptoms will make you aware of the problem.. A failed starter relay means the car may not start at all. Pull out the 2-3 wires in the relay with a pair of needle nose pliers, then remove the relay. If supply voltage is in between 160- 170 Volts, then there should be the problem of low voltage. Contact a repair person to take a look at your fridge to further diagnose the problem. Turn the relay over once again with the probes in position. Here are warning signs that yours may be … This image is not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. I have changed the overload but still have the problem. Look for burnt marks around the ports on the relay to see if it’s shorted. The material on this site may not be reproduced , distributed, transmitted, saved or used without explicit permission of the Refrigeration Club Edition. Unscrew the connectors holding the access panel to the bottom rear of the refrigerator. How to Test a Refrigerator Relay Switch. wikiHow's Content Management Team carefully monitors the work from our editorial staff to ensure that each article is backed by trusted research and meets our high quality standards. This image is not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. Step 3: With the relay in the vertical position, coil downwards, check if there is continuity between terminals 1 and 3. In this case, 84% of readers who voted found the article helpful, earning it our reader-approved status. Turn the dial on a multimeter to "Ohms X1." See the step-by-step to change the start relay: 1 – Remove the start relay After having located the relay, remove it paying great attention to the color and where the wire is connected. It could also mean that there is some sort of compressor overload. References If you can’t find the model number on the PTC relay, then search for the refrigerator model you have so you can buy a piece that fits inside. By continuing to use this site you agree to our use of cookies. This article was co-authored by our trained team of editors and researchers who validated it for accuracy and comprehensiveness. In addition to finding more technical information here on the Cooling Club website, you can also check our channel on YouTube. The analog multimeter needle should sweep to the far right of the display; a “0” should appear on the digital display. Use a pair of needlenose pliers to remove the wires, then pull the relay off of the compressor. wikiHow's. You can buy replacement PTC relays from appliance specialty stores or online. All tip submissions are carefully reviewed before being published. The needle should move to the far left on the analog multimeter, and “1” should appear the display of the digital meter. Cecilia Harsch has been writing professionally since 2009. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. Pull it from the terminal box, disconnecting the two female terminals from the stationary male terminals inside the box. What do I do if my fridge compressor is cool to touch? I have had to change it several times in the past two years.

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