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Old 09-07-2014, 02:15 PM   #99
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True, but does require climbing on roof.!
Unless you have a long mirror!
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Old 09-07-2014, 06:55 PM   #100
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Don't even have to take the shroud off. Just look through the openings, 3 large blades you've got the new style fans. Noel
Got on my roof for the first time today. 2 week old coach - recently off the line (I bought it before the dealer had time time to list it) - six blades to my fan. The noise does not bother me at all. Unless my wife complains, I'll leave it alone... Or I may not choose to share the fan upgrade info with her.
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Old 12-05-2014, 02:40 PM   #101
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Sadly, the replacement fan blade I put in lasted only 3 or 4 months! Heavy usage. But still, not long at all!

The blades started cracking away from the center disk, and the center disk is deformed. It looks like the plastic is doing one thing where the blades attach and another thing where there is no blade, just the center disk. Very much looks like a design issue. Either the physical design of it or the plastic isn't durable enough for the heat/cool that the unit experiences.
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Old 12-05-2014, 05:35 PM   #102
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Sadly, the replacement fan blade I put in lasted only 3 or 4 months! Heavy usage. But still, not long at all!

The blades started cracking away from the center disk, and the center disk is deformed. It looks like the plastic is doing one thing where the blades attach and another thing where there is no blade, just the center disk. Very much looks like a design issue. Either the physical design of it or the plastic isn't durable enough for the heat/cool that the unit experiences.
Entegra and RVP is working on this issue. Hopefully, they'll have fans in stock with the problem fixed in a month or two. See the thread started here by Rob, where you can enter your problem fans. Noel
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Old 12-05-2014, 06:54 PM   #103
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Noel, what is Entegra's stand on this? Will they warranty any part's that break due to the new replacement fan blades or will it all be on the fan blade vendor? Thanks.

Dave
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Old 12-06-2014, 01:35 AM   #104
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Thanks. I believe this is the link you are talking about so I'm posting it here so there is a convenient cross link for folks coming later.

http://www.irv2.com/forums/f278/rvp-...an-225536.html
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Old 12-06-2014, 06:42 AM   #105
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Noel, what is Entegra's stand on this? Will they warranty any part's that break due to the new replacement fan blades or will it all be on the fan blade vendor? Thanks.

Dave
Dave, I can't speak for Entegra, but I know they are on top of the problem. I have dealt directly with RVP, but I'm sure Entegra c/s would do the same. It's just easier, in this instantance, to talk directly to the horses head so to speak. Noel
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Old 12-06-2014, 10:15 AM   #106
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Hi all, I set up a separate thread for reporting any RVP MACH 8 3-blade fan failures or cracks in the blades:

http://www.irv2.com/forums/f278/plea...re-228386.html

If you had a failure or inspected your fan and found cracks (even small ones), please report it at the link above. I have sent that link to Engineering at RVP and also to Entegra so this will give RVP/Entegra a single point to gather how many of us of seen the problem without wading thru all the other posts on this and other threads.

The thread above also has links to photos of where to look for the cracks and who to contact at RVP if you also want to report the failure directly.

So far I count four of us that have reported a catastrophic fan failure, but there are likely going to be more.
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Old 12-10-2014, 01:02 PM   #107
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Update from Airxcel regarding fan blade cracking

Phil Robinson at Airxcel was in touch again over the past few days with some new info. I've got to say Phil and the team there jumped right on this once they had hard evidence and have been super responsive and helpful. Kudos to RVP/Airxcel!

Reference to the fans by letter A, B, C, D is in regard to the letter in the middle of the part number, for example 1472B504 is a B fan.

The new "D" fan protoypes will be at Airxel by around 12/20. Once they have passed muster, full production will begin in Jan and they should be ready for delivery around the beginning of Feb. The "D" fan will have a beefed up hub structure and be made of the same glass filled nylon as the previous B and C fans.

The "A" fans were the original six blade models. Phil just mentioned to me that they have some of these back in stock if anyone wants to go back to them for the interim.

"B" fans are the first of the 3 blade quiet design and were produced up until about May it would appear. Unless you replaced your fan recently this is probably what you have.

With the "C" fans the embossed part number stays the same (1472B504) but there is a white sticker over it that says 1472C504. NOTE: "C" fans have a thicker top section and should NOT require the second washer underneath the hub that many of us needed to add with the "B" fans to keep them tight on the motor shaft. If you have a "C" fan you still need one washer under the hub but not two.

All the fans have a production date code - to see that you will need to remove the fan and look inside the hub. Embossed into the plastic you will see four "dials" with an arrow pointing at a number. One dial is the year (13-18), one is the month (1-12) and the other two indicate the day. Please indicate the date code if you are reporting cracked blades.

Phil told me date codes around 2/14 were "B" pre-production models. The fans I installed last June had a 2/14 date and at this point all of mine have failed or developed cracks. Of the last three fans I received all were "C" fans with dates of 6/14.

There was a theory that some of the "B" fans had a production issue involving over drying the fabrication material. here is the latest quote from Phil about that: "The theory of using over-dried nylon material seems to not be supported by what we know at this time."

In regard to the loosening rubber fan motor mounts - these are known as "fan isolators" here is a quote from Phil:
"The fan isolator installation was moved to position #2 on the assembly line several months ago, this allows the installer of the isolator a visual clue as to whether the serrated screw has backed out to any degree after installing the isolator. The incidence of Loose isolators has decreased markedly since then."

Bottom line is the "D" fans should be the final fix and should be available by Feb 2015
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Old 12-10-2014, 01:47 PM   #108
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Winnebago uses the same Coleman AC. Had the factory replace mine at the factory in Sept. Was even on there dime! I believe that they are at least 40% quiter!
Haven't noticed any separation. But will keep cking.
See sig.
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Old 12-10-2014, 05:42 PM   #109
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Winnebago uses the same Coleman AC. Had the factory replace mine at the factory in Sept. Was even on there dime! I believe that they are at least 40% quiter!
Haven't noticed any separation. But will keep cking.
See sig.
Thanks for contributing and let us know if you find any problems! The more use your AC's get the sooner the problem will appear. If you haven't seen it yet this thread has some photos of what to look for.

http://www.irv2.com/forums/f278/rvp-...an-225536.html

A fan I installed in June failed in Oct. The replacement fan is starting to show very small cracks as of yesterday.

Rob
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Old 03-24-2015, 07:06 PM   #110
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Did the revision D fan blade make it into production as predicted for February?
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Old 03-24-2015, 07:16 PM   #111
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Around 1st of March.
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Old 04-07-2015, 11:04 AM   #112
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While on the roof the other day, I checked my fan blades out of curiosity. We had been hearing a strange noise form the rear A/C unit when it was running. At first we thought it was a very faint alarm sounding somewhere in the rear of the coach. The next day, it sounded more like a flock of birds nesting in a tree for the night; faint but audible. Anyway, the rear A/C has the 6 bladed fan and the middle and front A/C units have the 3 bladed version. Will check today to see if I can identify the model/version on those.
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