Jayco RV Owners Forum
 


Reply
 
Thread Tools Display Modes
 
Old 04-15-2016, 02:34 PM   #1
Member
 
Rjhuser's Avatar
 
Join Date: Feb 2015
Location: Urbana
Posts: 37
Exclamation ALERT - Coleman Mach 8 A/C Fan Failure

Everyone that has a Coleman Mach 8 Air Conditioner needs to inspect their outdoor fan blades! If you have a Part No.: “1472B504 or “1472C504” fan, read on.

A few weeks ago, while we were in Florida, I noticed one night that the bedroom A/C was noisier then usual. The next day, after the A/C had run a few minutes, it started making a terrible racket. I went on the roof and removed the A/C shroud and found the fan motor (the outside condenser fan) had broken loose from its isolation mounts. Closer examination revealed that the fan had failed at the root of one of the blades.



This caused the fan hub to bend, go out of shape, throwing the fan out of balance. This out-of-balance condition caused the motor mounts to fail.

Further examination of the fan revealed the beginning of cracks on the other fan blades:



I checked my other A/C unit and found the start of cracking on two of its fan blades, as shown above.

An internet search found several threads concerning these fan failures at these sites:
http://www.irv2.com/forums/f278/rvp-...it-210236.html
http://www.irv2.com/forums/f278/plea...re-228386.html
http://www.irv2.com/forums/f278/rvp-...an-225536.html

Very little else was found for this problem, no recalls were found, and nothing was found on Coleman/Airxcel/RVP’s website.

Apparently, RVP made a fan blade change on the Mach 8 A/C’s in mid-2014 from a six-bladed fan (the original 1472A504 version) to a three-bladed fan (the 1472B504version) due to a noise problem. There was a design/manufacturing problem with the replacement part, and failures started to occur. The fan was redesigned and a new version was released (the “C” version) shortly followed by another change (the “D” version).

I contacted Airxcel/RVP and requested replacement fans and new fan motor isolation mounts for both of my A/C units. After a bit of static and mumbling, they agreed to send the replacement parts to me under warranty.

Upon receipt of the new 1472D504 fans, some of the modifications I noticed in the “D” release included:
1. Filleting of all the fan blade to hub joints. Whereas the B design fan blades met the hub at right angles, the D design fan blades have a curved radius at the joint that should greatly increase the joint strength. Even the thin edges of the blade now curve gently into the hub.
2. The bottom blade edge on the B design fans ended right at the bottom of the hub, on the D design fan blade the bottom edge of the fan blade ends a good distance above the bottom of the hub. This should provide significant additional resistance to cracking. The hub height appears to have been increased to make this change.
3. Significantly improvement in the stiffness of the entire blade assembly was noted also.




So, if you have a Coleman Mach 8 A/C manufactured between mid-2014 and mid-2015 you need to inspect or have your dealer inspect your A/C units to see which outdoor fan you have. Molded on the top of the fan hub is the part number. If it is “1472B504 or “1472C504” you or your dealer needs to contact RVP at (316)-832-4357 and request a 1472D504 replacement fan kit under warranty. Of course you’ll get the “we haven’t heard of this problem before” or “it’s not really that big of a problem” but be determined with them and get the replacement fan.

If you’ve had a fan fail, also request the isolation mount replacement kit. Due to the imbalance caused by a failed fan, the isolation mounts could be weakened or damaged.

While you’re up there checking you’re A/C unit, it is also the perfect time to check and clean your condenser coil. You’ll be amazed and how dirty they get. They’re easy to clean – spray with a good degreasing cleaner suitable for aluminum, let set for a short while, then flush through the coils from behind with a water hose, being careful not to use a strong stream of water that could bend the coil fins. If a lot of the fins are bent, carefully straighten them with a fin comb or a plastic knife. This little bit of maintenance will improve the operation of you’re A/C unit and extend its life.

Rick
__________________

__________________
Rick & Debbie; Brandy & Schnoodle, (Dexter & Fritz R.I.P.) (The Doxie "Kids")
2015 Pinnacle 36RSQS
2013 Chevy Silverado 3500HD LTZ, 6.6L Diesel Dually;
20k B&W Companion Fifth Wheel Hitch
Rjhuser is offline   Reply With Quote
Old 04-15-2016, 03:17 PM   #2
Senior Member
 
Grumpy's Avatar
 
Join Date: Nov 2011
Location: Where ever the boss says we're going.
Posts: 4,119
Yep. Had them replaced on both units under warranty.
__________________

__________________
DISNEY LOVERS
PINNACLE 2015 38FLSA. aka: "Roam Sweet Home"
Grumpy is offline   Reply With Quote
Old 04-15-2016, 03:26 PM   #3
Senior Member
 
Join Date: Feb 2014
Location: MD
Posts: 2,428
Thanks for the info. Is there a quick way to tell if my Coleman is a Mach 8 (other than finding the paperwork that came with the trailer lol)? I've sold my 2014 264BH w/ a 15k a/c. I'd like to replace the blade before handing it over if necessary or at least let the buyer know it needs to be done. So far ours works great and is pretty quiet.
__________________
2017 JayFlight 28BHBE
2014 JayFlight Swift 264BH (Sold)
2007 GMC 2500 Sierra Classic Crew Cab LBZ Duramax / 6spd Allison
SouthCo is offline   Reply With Quote
Old 04-15-2016, 04:16 PM   #4
Site Team
 
norty1's Avatar
 
Join Date: Jan 2011
Location: Charleston, SC
Posts: 10,658
The Mach 8 is the low profile model line.

Coleman Mach - Mach 8 Ultra-Low Profile AC Units for RVs | Airxcel
__________________
Moderator
2011 351RLTS Eagle, Mor/Ryde suspension & pin box
06 F350 Lariat PSD, SRW, LB, CC, EGR delete kit, 16K DrawTite hitch, Timbrens, TST TPMS

Can't find what you're looking on JOF? Try:Jayco Owners Forum Custom Google Search
"It's easier to fool people than to convince them that they have been fooled." - Mark Twain
norty1 is offline   Reply With Quote
Old 04-15-2016, 04:50 PM   #5
Senior Member
 
Join Date: Feb 2014
Location: MD
Posts: 2,428
Thanks norty. Mine doesn't look like that...
__________________
2017 JayFlight 28BHBE
2014 JayFlight Swift 264BH (Sold)
2007 GMC 2500 Sierra Classic Crew Cab LBZ Duramax / 6spd Allison
SouthCo is offline   Reply With Quote
Old 04-17-2016, 08:42 AM   #6
Senior Member
 
3'senough's Avatar
 
Join Date: Sep 2010
Location: New York
Posts: 1,954
I have 2 of these units on my roof, but they were from 2013 manufacture date. Did you notice a noise reduction with the new fans? I would opt to buy just to lower to noise level as my fans sound like a 747 getting ready for take off when they both kick on.
__________________

2014 375 BHFS Eagle Premier
2014 Ram 3500 Longhorn DRW CC
6.7 CTD, Aisin, 4.10's
Yamaha EF3000iSEB
3'senough is offline   Reply With Quote
Old 04-17-2016, 08:51 AM   #7
Senior Member
 
Grumpy's Avatar
 
Join Date: Nov 2011
Location: Where ever the boss says we're going.
Posts: 4,119
Quote:
Originally Posted by 3'senough View Post
I have 2 of these units on my roof, but they were from 2013 manufacture date. Did you notice a noise reduction with the new fans? I would opt to buy just to lower to noise level as my fans sound like a 747 getting ready for take off when they both kick on.
It won't change the outside noise level if that is what you are referring to. Since there are two separate fans the inside noise level will not be affected.
__________________
DISNEY LOVERS
PINNACLE 2015 38FLSA. aka: "Roam Sweet Home"
Grumpy is offline   Reply With Quote
Old 04-18-2016, 07:25 AM   #8
Member
 
Rjhuser's Avatar
 
Join Date: Feb 2015
Location: Urbana
Posts: 37
It is my understanding, that if you A/C has the original six-bladed fan, the "A" version, the three bladed fan is quieter, how much I don't know.

The change to the three bladed fan was to address the noise problem.

Rick
__________________
Rick & Debbie; Brandy & Schnoodle, (Dexter & Fritz R.I.P.) (The Doxie "Kids")
2015 Pinnacle 36RSQS
2013 Chevy Silverado 3500HD LTZ, 6.6L Diesel Dually;
20k B&W Companion Fifth Wheel Hitch
Rjhuser is offline   Reply With Quote
Old 04-18-2016, 08:44 AM   #9
Senior Member
 
3'senough's Avatar
 
Join Date: Sep 2010
Location: New York
Posts: 1,954
Outside noise is my issue. It is double, if not triple what the 2011 noise level was outside. Yes the inside is quieter, but at night around the campfire when my unit kicks in you can hear it 3 sites away. It sounds like a diesel truck in 1st gear revving up. It is clearly the cooling fan outside that makes this noise. It's bugged me since day one.

If memory serves me right it is 6 blades. Have to check it when I clean the roof and AC drains in a few weeks.

I am going to investigate this further and change one fan out to see if there is difference.
__________________

2014 375 BHFS Eagle Premier
2014 Ram 3500 Longhorn DRW CC
6.7 CTD, Aisin, 4.10's
Yamaha EF3000iSEB
3'senough is offline   Reply With Quote
Old 04-18-2016, 10:24 AM   #10
Senior Member
 
Grumpy's Avatar
 
Join Date: Nov 2011
Location: Where ever the boss says we're going.
Posts: 4,119
The three blade does change much. In order to operate it has to move a large volume of air and that doesn't change , 6 blade or 3 blade.
__________________

__________________
DISNEY LOVERS
PINNACLE 2015 38FLSA. aka: "Roam Sweet Home"
Grumpy is offline   Reply With Quote
Reply

Tags
1472b504, 1472c504, coleman, fan failure, mach 8

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


» Virginia State Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

All times are GMT -6. The time now is 01:01 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Copyright 2002-2016 Social Knowledge, LLC All Rights Reserved.