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Discussion Starter · #1 ·
Hey fellow Xers, I purchased a 2009 mdx tech this past winter. Awesome vehicle, but now that it's getting hotter here in New England area i wanted to use my AC. I turned up the ac to the max, but nothing but warm air is blowing.So I figured just low on freon, I purchased some Artic freeze R-134a refrigerant. I plugged the can to Low valve and pressure was in the red already (about 130 psi). Is there a big problem here? Or should I take to a shop for a evacuation and recharge? Anybody else experience this issue? Thanks
 

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The ac clutch relay is probably out. Very minor problem. Google around u will find out really quick.


Sent from my iPhone using Tapatalk
 

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*even though I'm not experiencing any AC problems (presently...knock on wood) on my 2009 MDX, I'm contemplating changing the AC clutch relay on it anyhow, as the part doesn't appear to be costly ($16.69 for a Duralast relay- anyone have any better recommendations?)- and it appears to be something so easy that even I can do!! :29:


Duralast Relay - A/C Clutch
(Autozone part #: 20743 ) $16.69
Duralast Relay - Heated Seat 20743 - Read 1 Reviews on Duralast #20743
 

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2008 MDX Tech+Power Tail Gate, Sterling Gray
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Hey fellow Xers, I purchased a 2009 mdx tech this past winter. Awesome vehicle, but now that it's getting hotter here in New England area i wanted to use my AC. I turned up the ac to the max, but nothing but warm air is blowing.So I figured just low on freon, I purchased some Artic freeze R-134a refrigerant. I plugged the can to Low valve and pressure was in the red already (about 130 psi). Is there a big problem here? Or should I take to a shop for a evacuation and recharge? Anybody else experience this issue? Thanks
1. What kind of pressure gauge did you use?
2. If 130 psi in the LOW side port is correct as you say, you might have a bad compressor.
3. What is the pressure on the HIGH side?
 

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dumb (quick) question of the day....is 'Clutch Relay' SYNONYMOUS with the term 'A/C Clutch Relay'? Or do they mean/represent two different parts?
I'm gonna go out on a limb here and say "Yes, same part." But dealer should have listed a Honda part number on the invoice, and you could check that against parts listings if you really want to make sure. It's a useful skill to be able to navigate the somewhat arcane organization of the Honda parts listings and diagrams.

I like these guys for OEM parts, but there are others. And some dealers will price match at the counter.

https://www.oemacuraparts.com
 

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I'm gonna go out on a limb here and say "Yes, same part." But dealer should have listed a Honda part number on the invoice, and you could check that against parts listings if you really want to make sure. It's a useful skill to be able to navigate the somewhat arcane organization of the Honda parts listings and diagrams.

I like these guys for OEM parts, but there are others. And some dealers will price match at the counter.

https://www.oemacuraparts.com
Gracias! :1:
 

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Discussion Starter · #14 ·
I used the reusable dispenser gauge that came with the ac refrigerant, since my initial thoughts were my freon was low, because of the warm air that the ac was blowing. The compressor wasn't engaging,that's why pressure was reading 130 on the gauge on the low port. I didn't measure the high port.Went to auto zone for ac clutch relay $13 and plugged it in. Compressor then started to engage, put the gauge back in the low port and it read about 25 psi.
 

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the threads may be relevant/useful if problem is in fact the clutch relay...it's good that you're looking to do the potential replacement yourself, poor fellow (I think) in the 2nd thread below spent about $600 in Acura stealership labor- just for the clutch relay replacement on his 2nd gen. MDX!!!!!!

http://www.mdxers.org/forums/74-second-generation-mdx-2007-2013/52321-c-clutch-relay-bad.html

http://www.mdxers.org/forums/74-sec...13/71241-battery-drain-ac-problem-1100-a.html
Finally got around to reading some of the background. The poster who paid lots of dealership labor had the "A/C clutch" and associated electromagnetic coil replaced, not just the "A/C clutch relay" that sends electricity to the coil. It's the difference between replacing a light bulb and rewiring a room. Sorta. Lots of labor to get access and remove and disassemble the A/C compressor. And the clutch and coil are much more expensive than the relay.
 

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Finally got around to reading some of the background. The poster who paid lots of dealership labor had the "A/C clutch" and associated electromagnetic coil replaced, not just the "A/C clutch relay" that sends electricity to the coil. It's the difference between replacing a light bulb and rewiring a room. Sorta. Lots of labor to get access and remove and disassemble the A/C compressor. And the clutch and coil are much more expensive than the relay.
thanks for the clarification- i would NOT have been able to decipher that one on my own...just used my friend 'Mr. Google' and see that average (generic stealership) Car AC Compressor Relay Replacement costs between $78-$146 to replace, which means that one can most accurately conclude that the Acura stealership cost (parts & labor) for the AC Clutch Relay replacement (by itself) would likely amount to about $200-$250 :p
 

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Is anyone able to please confirm (with regard to the 2nd gen. MDX CLUTCH fuse/relay location on a 2007 MDX vs. a 2009 MDX) that the CLUTCH relay locations are in fact different when visually comparing the engine compartment (primary) fuse boxes between an '09 MDX vs. an '07 MDX?

My cousin from IL us currently at my home in suburban Detroit, MI with her crimson red 2007 MDX- parked beside my shinier bali blue 2009 MDX in my garage, and I just recently manged to convince (more like bribed her lunch and dinner today :p ) to be the guinea pig as I (or shall I saw WE?) replace our AC clutch relay's on our slightly different years MDX's.

While I can easily refer to the you tube video (for a 2009 MDX clutch relay replacement) below to locate the correct fuse/relay within the engine compartment fusebox of my 2009 MDX...

The owner's manual (downloaded online) for my cousins 2007 MDX seems to show that this clutch relay/fuse location is in fact located within a different area/region within the engine compartment (primary) fusebox:
<img src="http://www.mdxers.org/gallery/500/thumbs/ClutchRELAY-2007.JPG">

*Is the diagram above correct (for a 2007 MDX AC/Clutch relay location- within engine compartment fuse box) or has my mechanical disinclination and/or overall stupidity just gone into hyper-intensive overdrive?!<br>
I really don't want to mess up her 2nd gen. MDX and end up plugging this Clutch relay (purchased from Advance Auto Parts for about $6 bucks) into the wrong relay/fuse location of her '07 MDX- she just recently endured the infamous, 2nd gen. MDX parasitic Bluetooth draining/battery problem last year, and will certainly kill/maim me if I end up messing up her car- especially the electronics!
 

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Google is my friend :29:

so I guess all MDX's (2007-2013 at least) have a primary and secondary fuse box in the engine compartment, and it's the SECONDARY fuse box where the A/C Clutch relay will be located :nerd: (please correct me if I'm wrong):

<img src="http://www.mdxers.org/gallery/500/thumbs/ClutchRELAY2-2007.JPG">
<img src="http://www.mdxers.org/gallery/500/thumbs/Capture3.JPG">
 

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Priscilla, have a look at the link - there is a photo with the fuse box open and the relay circled

http://www.mdxers.org/forums/74-sec...battery-drain-issue-2011-mdx.html#post1292874
Thank you Jeremy :29:

Our goal today was to get my cousin's '07 MDX's A/C clutch relay replaced before dusk today (we're now ahead of schedule! :D) and my '09 MDX's AC clutch relay replaced before bedtime...we're on a roll now :laugh: ...

i'm actually applying some of that recommended 'dielectric grease' to the metal contacts of the new relay's before I put them, that is of course after I figure out how to use these 'ABN Relay Puller Pliers ' that just arrived via Amazon Prime (to remove the old AC clutch relays and to do as such w/o breaking any nails!). :nerd:

I'm just glad we're doing this on my cousin's 07' MDX first- if the car explodes or completely dies after she starts it, and then turns the Air Conditioner on, at least I'll still have my '09 MDX to reliably transport me along the rough & tough streets of Detoilet! :13:

<img src="http://www.mdxers.org/forums/attachments/second-generation-mdx-2007-2013/93186d1496248156-battery-drain-issue-2011-mdx-ac-relay1.jpg">
 
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