A/C Not Working? Check this! | How to test and replace an Evaporator Temperature Sensor
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- Опубліковано 26 лип 2024
- We are continuing our series on how to diagnose and repair your vehicle's a/c system. The last two episodes dealt with low refrigerant (low r-134a refrigerant) and testing an a/c compressor clutch. Today we're looking at the Evaporator Temperature Sensor. Subscribe today and save hundreds (if not thousands of dollars) repairing your own vehicle.
Why isn't my car AC not working? How to recharge car AC. AC not working in car. Car AC stopped working. Car AC problems and solutions. How to fix car AC not blowing cold air. Car AC blowing hot air. Free car AC diagnosis. How to check if my vehicle has refrigerant. What is an ac compressor? How much does it cost to fix car ac?
The evaporator temperature sensor is commonly found on many vehicles. It is a part of the vehicle’s AC system, and as its name implies, detects and monitors the temperature of the AC system’s evaporator. The sensor (or switch) is usually installed directly on the AC evaporator or in close proximity and monitors the temperature of the evaporator so that it can be properly regulated to stay within reasonable operating temperatures. When the sensor detects that the temperature is approaching high temperatures, the AC system will increase flow through the system to increase cooling and will reduce flow when it detects that the evaporator is cold to conserve power and prevent it from freezing over. When the sensor fails or has any issues, it can hinder the performance of the AC system and even cause it to malfunction. Usually, a bad or failing evaporator temperature switch will produce a few symptoms that can alert the driver of a potential issue that should be serviced.
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Chapters:
0:00 - Intro
:29 - Locating evaporator temp sensor
1:28 - Removing evaporator temp sensor
1:46 - Testing evaporator temp sensor
3:00 - Wrap up
Note:
Any attempt to repair automotive parts and/or systems carries risk of personal injury. Always adhere and follow safe practices when working on vehicles. Such as, safety glasses, jack stands, no loose clothing, etc. No guarantee or warranty is implied. Use the information in this video at your own risk. Carsntoys is a member of the Amazon Influencer Program.
Publication, reproduction or distribution of this film is strictly prohibited.
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Thank you for this! I had replaced the thermistor on a 2017 Tucson and saved the $1200 repair bill. Later I had the same issues on a 2017 Genesis but could not find the thermistor. Your video was the key to locating it.
Super bonus points to you for: showing how to test the resistance of the sensor. The Genesis tested good so I most likely need a new compressor. I still had the thermistor from the Tucson and it tested bad. So I confirmed I made the right choice before and also that it wasn't the same (cheap to fix) problem again.
Thanks for the info on how to test it. Mine had 3 wires, but I found a combination that gave me resistance on the new sensor. The same prongs on the one in my truck gave me no resistance. This test was important for me because the A-hole engineer at GM put this sensor on top of the HVAC fan box, so I had to completely remove the entire dashboard to even get to the sensor. I am relocating the new sensor to the bottom of the dash so if it fails again, I can replace it and not have to take anything apart.
Very nice and simple, thanks
Thank you teacher 🌼
Excelente información me es muy útil, saludos desde el Puerto de Tampico Tamaulipas México
Need to try this out✌✌✌✌✌thanks
You can also get a resistor and bypass the sensor. These resistors cost like $3 to $5 at hardware or electronic stores. They also usually dont require you to disassemble the dash as you just need access to the plug wiring harness and do not need to remove the sensor.
What car did you test the temp sensor from?
Hi, Having this problem with my A/C system replace compressor checked all fuses checked relays also checked gap of clutch, but after charging system blows 38 degrees as long as the clutch is engage but when it dis engage cab runs hot about 70 degrees. Now on the old compressor i checked the coil ohms read up to 14.5. a bit off from 5 - 2 ohms. so the new compressor doing the same as the other. I did check the new one for ohms and it came out 4.4 ohms. just as the old one after running, it dis engage around the same time, and want engage.
So I switch car off let sit for about 10 minutes switch ac on clutch engage bring temp down to 38 degrees just to repeat the same cycle over and over. Oh i check the new compressor for ohms while still on car and hot came out 1.2 ohms
Where can we find the car repair manuals that you use in your videos?😆
Can I use different evaporator sensor from other car brand..? Example, my car is Mazda 3 and I will use evaporator sensor from Ford, or for other car brand that is similar to Mazda 3, I will just replace the socket to fit on my Mazda 3. Is it possible. I hope you read my comment. Thank you..😊🙏
How do I find it on a 2009 Ford fusion?
is this a common problem on a 2006 Mazda 3s 2.3l ?
It's the same for the pontiac torrent 2006?
anything on 2008 honda civic dx
my engine shutters at 3 and half rpm. I've read it's the throttle control relay or a fuse but I have no idea where the fuse or relay is , also read it could be the mass airflow sensor dirty , I'll be sharing your Excellent explained videos to my Facebook thanks
There’s a fuse box in the engine bay and there’s a second fuse box called the modular control panel I think typically left side of steering wheel down, also if ur mass airflow sensor was dirty it would put the check engine light and give a misfire code
He have only one ? O he have on in each side ? Thanks
I have a Nissan minivan NV 200. I’m having an AC problem everything works except I’ve got an open circuit somewhere between my relay and the clutch. I checked the high-pressure switch I could not find a low pressure switch. However, I believe there is any evaporator temperature switch that they are using in place of a low pressure switch. Could you possibly tell me if this unit has such an application before I start tearing into the dashboard trying to find something that may or may not be there I have looked everywhere to try to get information on this unit and I can’t get it from anybody unless I join some kind of an auto group and pay them about $35 a month, I’m not going to do that because I can buy a chiltens book for about the same price I’m just warning to know a simple yes or no answer to a simple yes or no question. Thank you.
What car is this your working on?
❤
where is this in a 2010 dodge ram 1500
Anyone know the part number kn this?
What the name of this sensor?
Thermistor or evap temp sensor is the one under the dash
I think I'ma check that because I'm lost... Compressor and fan turn on and still no cold air... Like when I add freon it's cold for like an hour but after that it's not working anymore
Did you check for a leak? Remember the clutch won't engage if the pressure is too low or high!
@@marcosanchez896 there is Freon and the clutch AC does spin so I'm not sure what else would it be... I even changed the condenser... And it ran for like 2 hours and then it stopped blowing cold.... I'm guessing maybe it's the AC switch button like the one that's inside the car will you turn on the AC.. not really sure
@@marcosanchez896 it does not have any leaks
@@hacatan24 Hablas español?
@@hacatan24 The compressor could be spinning but the clutch not engaging or engaging on and off. You can hear the click e verytime the clutch engages or disengage.Check the clutch relay or swap it for another one in the fuse box of course has to be the same! What kind of car do you have?
Can we contact u