Grand Marquis AC blows warm with good pressures and cold low side diagnosis (dtc self check)

[@paulkelley86]

FYI everybody this is meant to be a diagnosis than a repair. Although it may repair it temporarily. We later replaced the temperature door actuator behind the dash in very tight work space with radio etc. removed. We were able to do it without pulling the dash.

[@brendandemjanec5737]

yes, if you loosen all the dash bolts and jam a piece of wood behind the dash on passenger side, even then its a tight fit haha

[@Elliott502_]

I just wanted to say thank you so much for this video. I’m finally have cool air in my car from pressing two buttons at the same time.

[@anthonyalain5378]

It worked when I reset it. You made my day man.

[@user-qz8un3po1n]

Worked perfect it reset the ac and is blowing cold now thank you sir

[@tylerwilkins2096]

Thank you for posting this video! It helped me so much!

[@ninoblack3772]

Just worked on my 2009 grand marquis thanks bro

[@pedrothemexican3360]

Only two things break on these vehicles: The plastic intake manifold and the blend door actuator. One is a $130 part and 6 hours labor, the other is a $20 part and 4 hours of labor....and abraded knuckles. ;)

[@alexr.sauceda1732]

Thanks for the help you really helped me out with this thank you so much.

[@user-lm4dn3hf1v]

Bro that worked, you the man!!

[@chriswasson8414]

This fixed my issue! Thanks a ton!!!!!

[@TerryCarroll-ui9mv]

Thanks for the video, I fixed my ac. Thanks

[@Darealdirtydonkey]

Thanks for the video, helped alot!

[@timf.3130]

it didn't work 100% for my 98 ltc (it didn't beep) but i did see a difference in heat. i need to recharge it and i think you helped greatly with the process!

[@therealkreolejay5108]

Ohh yea big brudda you hard , I reset mine and it's now workin , big thanks

[@Felipe-fuerte]

Great video ! 👍🏽 📹

[@ianjabagt5474]

Thank you very much! It worked 💪

[@nbatredayoungsta8990]

Mine works when I reset it big thank u cuz🔥

[@katogee7042]

Holy sh**

[@kellymc239]

I have an '03 Grand Marquis (Ultimate). Check the Blend Door Actuator. Mine failed, and it allowed the blend door to stay open to the heater core. Pull the glovebox, and airbag, and use an 8 or 10mm ratchet-wrench on top of the hvac housing (under the dash cover). Note: you can replace the actuator WITHOUT pulling the whole dash out, but you need small fingers/hands to pivot the ratchet-wrench on the 3 bolts holding the actuator in place. Also, DON'T drop the little bolts, if you do, they're gone. Trust me on this. Just have a set of 3 spare bolts when replacing it.

[@paulkelley86]

Yeah that was the fix on this one as well. You saved yourself a bunch of money 💰

[@lvnvxlt8653]

I've done this with my 95 Linciln TC and the thump is the mode door actuator which involves dropping the dash and it's a pain. You can temporarily get the mode door 2 move but should've been done with car on run but not running. Push defrost to cancel mode test after you see any codes.

[@dontorgeson5327]

97 Mercury Grand Marquis same problem. No thumping. Pressed floor- Auto same time. 024 then 025 then repeat those numbers showed in my display. Tried all buttons then last button was blue AC button upper left and now Ice Cold Air. Thank you

[@rafiulrasheen4738]

Hey Paul, what would you say would be a reasonable price a mechanic would charge? I have the exact same problem in my vic lx. Thanks

[@MrGgarcia7298]

A/c was blowing hot in my 09 Grand Marquis. Performed this self test and I got cold air again. But, there were no trouble codes present. Wondering what's going on in my case.

[@VizmaL]

The code fixed mine temporarily. Thank you, it’s hot af outside

[@jonathanreich9694]

Once I did the reset as you described in the video my A/C started working again. Thank you, no telling how much money you saved me. The code I got was 025 what is that code say. Thanks again for the video!!

[@christophermolnar804]

Replace blend door actuator

[@JesusMartinez95830]

​@@christophermolnar804 and code 041?

[@esw427]

Do you know what code 031 means on the ETC unit? This is the code I get when I do the self test.

[@nelsoncline4373]

Not sure if you'll see this as it it's 5 years later but mine is showing codes 024 and 025

[@anthonyburnett6043]

Pressed off and floor then automatic didn't work... wont self test... Doe's that mean bad Head unit?

[@WebNstyne]

My 06 LX Sport is doing the same

[@franciscomolina2240]

Gracias 👍🏼

[@susanm7355]

i cant get my compressor to come on. i replaced my entire system evacuate and charged the system and will not come on if i direct wire it will com on but the high side pressure goes up. any ideas im really stuck. i replaced the low and high switches pressure switches too fuses are good, checked the ground using continuity and it works as well as the positive side. so no breaks in the wires

[@paulkelley86]

Check for 12v and ground right at the compressor clutch connector on the compressor. Update me with your readings.

[@Beardshire]

I can't use max ac, i have to put it on Auto or it doesn't work.

[@shayblayzer]

I have a 2005 Mercury Grand Marquee the air compressor spins the clutch is not engaging every once in awhile like it should the freon and pressure is great low pressure hose gets ice cold but the vents are blowing really hot air will this also fix the issue with my 2005 Grand Marquis?

[@paulkelley86]

This may temporarily fix but it is intended to be a diagnostic procedure. Try it, sounds like you have an issue with a temperature door actuator.

[@norohealy5344]

I have a 2011 Gran Marquis and need to take it to a shop which can charge it. I'm in Elizabeth, NewJersey. Can you please make a recommendation. Thank you Noro Healy

[@villapinstriping]

While holding floor press automatic...

[@WebNstyne]

How do you stop the clicking?

[@paulkelley86]

Replace the actuator that is defective, it has internally stripped gears and it is the one making the noise

[@aidanwhite7278]

I have an 08 marquis and I recently got a new compressor but it just started blowing hot air, what do you think I should do?

[@paulkelley86]

The root cause needs to be diagnosed. The new compressor is just a part of the system with many components so that being replaced means nothing about all the other components.

[@aidanwhite7278]

@@paulkelley86 thx, the ac was working for a few days until it started blowing hot again, do you think it will be an expensive fix ?

[@paulkelley86]

@@aidanwhite7278 You can't estimate it when you don't know what is wrong. You are going to pay for someone's time to diagnose, hopefully they are qualified and diagnose correctly. Then you are going to pay for an unknown theoretical part most likely, then for the labor to more than likely replace or repair a part. Maybe it is a leak, maybe its a failed component, damaged harness, who knows...... When you understand that, yes, it will cost money. Would I consider it expensive? I don't know, a $7 starbucks is expensive to me, a first time correct diagnosis without multiple guesses and wasted money on incorrect diagnosis sounds like a great bargain if you asked me. Make sure whoever does your work knows what they are doing, and pay them what they are worth. Or try to save some money by using a "cheaper" option and see how that goes.

[@pedrorivero3251]

It took me 3 self test on the system and then my cold air started blowing

[@kisserofdogs3218]

How much should this cost to repair ?

[@paulkelley86]

The point is the video is to aid in diagnosis. You don't know what is wrong with your car, which is why a reputable shop will charge a diagnosis fee, to determine the source of your issue, then provide you with an estimate. There are dozens of possibilities when AC blows warm.

[@n.b.p.davenport7066]

I have a 1998 Crown Vic and I don't have that self test their diagnostic on my climate control, or maybe I'm doing something wrong?

[@paulkelley86]

you may have the more basic manual HVAC system rather than this automatic temperature control system. Does it look the same and have the same buttons?

[@robloxtower8822]

orifice tube?

[@paulkelley86]

An orifice tube issue would affect pressures and this test wouldnt have changed the vent temp. If doing this makes it work, it is a problem with the temp/blend door.

[@timf.3130]

it didn't work 100% for my 98 ltc (it didn't beep) but i did see a difference in heat. i need to recharge it and i think you helped greatly with the process!