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3 Symptoms Of A Bad AC Pressure Switch [HIGH OR LOW] & DIY Fixes

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Is your car's air conditioning system not functioning properly? In this video, we will explore the common bad AC pressure switch symptoms and look into its location and replacement cost. More info: mechanicbase.com/ac/ac-refrig...
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00:00 Introduction
00:31 AC Function
01:17 Bad AC Pressure Switch Symptoms
02:34 AC Switch Location
03:29 How To Test An AC Switch
06:17 Repair Cost
06:47 Emptying The System
The information contained on this RU-vid channel is for general information purposes only. This video cannot and does not contain automotive advice. The automotive information is provided for general informational and educational purposes only and is not a substitute for professional advice.
#acpressureswitch #acswitch #badacpressureswitch

Опубликовано:

12 авг 2024

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Комментарии : 79

@MechanicBase 7 месяцев назад

Did you solve your AC switch issue? Let us know in the comments below how you did it, and maybe you can help someone else with a bad AC pressure switch! Don't forget to like the video and subscribe to our channel! More information: mechanicbase.com/ac/ac-refrigerant-pressure-switch-symptoms/ Website: mechanicbase.com/

@RUSHnRoulet 4 месяца назад

I’ve done this over two decades, I like watching others explain. You sir explained it very well, great job 👌🏼

@user-ji8ls9dr9f 3 месяца назад

Your hand deserves a special mention for its hard work in explaining the content for your viewers.

@Thunderbyrd. 11 месяцев назад

Great info and well explained, I'm going to test my switches as my ac and compressor clutch stopped all of a sudden when the air was good and cold. There were no noises like I've heard from clutches going out, so I think maybe it's a switch because fuses and relays are testing good. And finally, someone who cares enough about their car to keep the engine bay clean. Everyone else on YT are doing tutorials with dirtiest and nastiest engine bays on the planet, lol.

@richardmoorer2668 2 месяца назад

Low pressure side is the large tubing, high pressure is small tubing

@darrellteague8629 2 месяца назад

He did get them backwards. Good catch

@jimmysapien9961 2 месяца назад

Omgggg

@mdoubleu4028 4 месяца назад

Great video… Explain a lot of questions I had about my AC… I replaced the switch and it works awesome now… Thank you

@saad2988 23 дня назад

Wanted to know if the refrigerant will escape or not you are the boss thanks

@kkenneth100 3 месяца назад

I've done heating cooling work. This is the first I've heard of the low pressure switch on the small liquid line.

@jimmysapien9961 2 месяца назад

Me 2

@Originalyardiesandy Месяц назад

Hi there, I’m just checking out your channel. Good stuff. My AC is constantly running like if you’ve turn off the switch or turn off yeah if you turn off the switch, the AC is constantly running. It’s supposed to. It’s supposed to stop like time out, but it’s not doing that like my switch that’s supposed to stop accelerate or something like that it’s not working

@hassannihat1512 8 дней назад

If the switch is faulty would the out cover plate still spin with the pully whether the air-con is on or off as I can't hear the compress clutch clicking?

@1776FreedomNow 8 дней назад

i have a 94 civic. it has a Dual AC pressure switch (detects high and low pressure). is there a way to bench test the pressure switch with a vacuum pump/gauge? the service manual doesnt have any specs for bench testing the switch.

@alonsonavarro2126 3 месяца назад

Great info, even better presentation and explanation. Thank you, sir.

@stephtraveler7378 7 часов назад

great vid but you got the tube size backward. large tube is low pressure.

@shojo8708 14 дней назад

My car tried to stall when I had the AC on and I saw white smoke coming out of the ac vents that went away after a few seconds. I turned it off then when I got home 20 miles later the car stalled then started. What do you think the problem is?

@louperkins5497 4 месяца назад

What obd app was that? I want to get a Bluetooth one that works the best with the most options.

@jrockaz548 3 месяца назад

2011 highlander new compressor condenser expansion valve flushed charged to correct amount no leaks the AC runs fine above 1500 rpm but compressor and fans stop below 1500 rpm n ac light flashes

@ismaell615 Месяц назад

Do you then an impact can make the sensor go bad ? I hit a bad pot hole and my ac stop working there no leaked or broken wires and the fans are not spinning, which makes me think it’s the sensor

@AVR.Kannan Месяц назад

Great explanation. Thanks.🎉.

@SolomonX-ic3gr 2 месяца назад

Where would ac switch be located in 2014 S550 Mercedes Benz. Will a bad switch cause the fan to run at top speed? Thanks

@user-uq5zi4ku3z 4 месяца назад

Hi, please confirm that the low and high pressure lines are identified correctly in the video.

@thromboid 4 месяца назад

I'm pretty sure the high pressure line has the smaller diameter, and the low pressure line is fatter. The service port caps should be labelled L and H to identify clearly.

@jeffreybarrett1910 3 месяца назад

High pressure connection is larger on mine but line is smaller

@user-ji8ls9dr9f 3 месяца назад

Just watch the hand.

@danielploy9143 Месяц назад

Can a faulty switch cause Freon to leak out?

@ronaldh2246 29 дней назад

Theres a valve BEHIND the pressure switch on my truck just like the low line. Youre supposed to change them ALL at the same time to avoid a leak happening in one of the other ones. They sell a kit. Comes with 2 caps for the high and low lines. 2 shrader valves ans a valve for the high line under $15

@EvolOne-ic5xv 5 дней назад

Bought a car 2 weeks ago that ac blew very cold, but all of a sudden now, it's just warm. Does anyone know exactly what it is ?

@m.t.v.7934 Месяц назад

How do you know what pressure sensor is the bad one? Low or high? I do not have a high end scanner but it did pick up a code (B1079) and most common fixes says "Replaced A/C Refrigerant Pressure Sensor" but doe snot tell me high or low? Any ideas? It is on a 2013 Lancer

@mikerizzo167 Месяц назад

Just put your hand physically on each one, you will feel which one is clicking. Just like with relays

@MrRohanstar Месяц назад

My friend spend hundreds to replace compressor, change all seal condenser, on a 2019 hyundai kona and still no ac ,it uses 1234yf freon ,I'm thinking pressure switch or computer command wire,I scanned the system with autel 908spro no code ,al 3 fuses are good ,I command the relay on with key on engine off and the clutch clicks with engine running try to command relay on fails

@diont7967 2 месяца назад

I need help locating the AC pressure Switch on a 2011 GMC terrain 4 cylinder. Any help would be greatly appreciated. Thank you

@stugrant01 Месяц назад

There would be two pressure switches, a low pressure switch (on the fat pipes) and a high pressure switch (on the skinny tubes).

@JayZapata-bi6tk 2 месяца назад

I have a 08 dodge avenger and I can't find my ac pressure switch 4:13

@joe-pm3lb 2 месяца назад

on mine the low high switch ground out and was blowing the fuse like blow now

@kaisonwworld 2 месяца назад

I have a 2002 BMW e46 330ci I can’t find ac pressure switch?

@jacquescarrera7180 2 месяца назад

Hi guys where is that ac pressured switch located on a passat B8 TDi...? I cannot find nothing on the Internet Also on passat B8 is tgere a low pressure switch and a hight pressure switch or just 1 switch . I found 1 switch near the fuel filter but I am nir certain that is the one. ( coukd it be the fuel switch..😂) Thank you

@Ghost_png_ 2 месяца назад

Appreciate your video. My only symptom is the display showing the ambient air temp is lower than it really is. Are there any other reasons that would cause it that’s not in the video ?

@jonathantrejo6853 5 месяцев назад

Hello I’ve replaced my ac compressor, my condenser, also the expansion valve and I’m still having trouble with my ac. It blows really cold then cuts out. I’m leaning toward the ac pressure switch any ideas what it could be? 🙏

@niftysin 5 месяцев назад

Does it work intermittently? Like when you first start your car it works then just shuts off.

@wdchaconpereira 5 месяцев назад

@@niftysinyes

@niftysin 5 месяцев назад

@@wdchaconpereira definitely sounds like your pressure switch. What vehicle do you have

@maniacslap1623 3 месяца назад

This definitely sounded like the pressure switch.

@shannonprice525 3 месяца назад

Could be a pressure switch or could also be a clogged system or even a bad ac filter/drier

@earthisfat6184 4 месяца назад

My compressor is coming on. No short cycling but my ac lines don't even get cold. Full of correct amount of refrigerant.

@shannonprice525 3 месяца назад

That sounds like a blockage in your ac system. I'd start with the cheapest fix and replace the expansion valve and drier filter after recovering the Freon from your system and then recharge after replacing both the expansion valve and drier filter

@earthisfat6184 3 месяца назад

@@shannonprice525 I got the expansion valve. Going to install it first and see if my levels change. My high and low side were staying equal even with my compressor engaged. Problem is my car takes an oddball compressor that's hard to get.

@A.Musa76 2 месяца назад

Actually before you do anything hook up the AC pressure gauge first (I used the Recovery machine). I’m in the same issue. I narrow it down to the Compressor Control Solenoid Valve. (Part is in transit).

@earthisfat6184 2 месяца назад

@@A.Musa76 me too. I just replaced the compressor and the expansion valve. Working fine now. Mine takes a very rare compressor that was only used on a few hundred cars too. Found a used one.

@A.Musa76 Месяц назад

@@earthisfat6184 That's great you got your A/C working. I got mine working over the weekend. It was the A/C compressor solenoid valve was the culprit for me.

@wonders5596 5 месяцев назад

Very concise and mechanic genius video for DIY, thank you.

@abdalqadr1 4 месяца назад

Thanks

@thedronedudedenmark 2 месяца назад

Great video 💪 Do You know where I Can switches in Mercedes ML320 2006 ?

@wesleyblake8552 4 месяца назад

Hi just asking for help with my aircon it has been to 2 aircon guys a new compressor put in and still wont work properly. At around 29 degrees the air flow cuts in half and so does the cold air , I have to turn it off and put on the through air on 4 fan speed and then the air speed comes back after 10 seconds I then put the aircon back on works fine again for about 5 minutes then it all happens again ....can someone help me please.

@allabouttravel1007 3 месяца назад

Wow mine does exactly the same thing , no idea why it's all been leak checked and refilled compressor is ok drive belt renewed,

@juntong651 2 месяца назад

HI THE TRUCK 80% BLOW HOT AIR SO I REPLACE THE AC COMPRESSOR EXPNSEN VALVE AND ALSO THE PRESSORE SENSER , VACUM THE SYSTME AND RECHARGE THE FREON , BUT THA AC COMPRESSOR KEEP ON AND OFF FOR A MINUTE , DO YOU KNOW WHAT IS GOING ONG WITH SHIS AC SYSTEM

@MSGxBlueForce 2 месяца назад

What about evaporator ??

@MSGxBlueForce 2 месяца назад

When you turn AC on, look behind your “radiators” and see if the fans start running. (While car is running and on idle)

@juntong651 Месяц назад

@@MSGxBlueForce Hello, the ac sometime work ， sometime not , but when it work , it really cold , dddl Has code: lost communication with front HVAC / HVCF for 3 seconds or longer, 524025 31 I been replaced AC COMPRESSOR /EXP VALVE /PRESSURE SENSOR VACUUM AC SYSTEM recharge the freon, it work one month and it happened again, can you tell what is going on with my truck , I did not replace the dryer filter , you think could be dryer problem? Truck is 2019 freightliner. Cascadia if you know anything, please let me know!🙏🙏🙏

@ronaldh2246 29 дней назад

@@juntong651you probably have a leak at one or all of your valves

@Shadow-qg6wc 3 месяца назад

Does a 2017 toyota Yaris ia only have one switch? I cant find any information on this and I only see one.

@kkenneth100 3 месяца назад

It could just have one. The low pressure switch usually cycles the compressor on and off but it's on the big line not the small.

@shannonprice525 3 месяца назад

There is two. The other switch is located inside your dash where the evaporator is located behind the firewall

@hawkslayer2351 3 месяца назад

My ac blows fuses every time i turn it on is that a pressure switch

@shannonprice525 3 месяца назад

If it's blowing fuses every time your ac cuts on, that's a bad ac compressor. The ac clutch is causing the issue and cuts it off.

@jimmyjones8021 2 месяца назад

Where's my switch on my 2019 Chevy Impala at

@rayrodriguez3745 4 месяца назад

Ac ac sensor on 2020 Chevy malibu???? Location???

@MrRohanstar Месяц назад

Can u bypass it

@MechanicBase Месяц назад

That wouldn't be a good idea, TBH😉

@TheUltimate65 3 месяца назад

The AC system must be emty before the swith must be replemended

@shannonprice525 3 месяца назад

Only on vehicles with no check valve. I've replaced plenty of AC switches and as long as it had a check valve, I've replaced the switch without having to recover the Freon from the system