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Old 08-21-2015, 04:33 PM   #1
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Radiator Fan

Hopefully I've found the right area for Holiday Rambler questions since the old owners forum disappeared.

The electric fan on the front of my radiator in my 1991 Holiday Rambler with a 454 gas will not turn on no matter how hot the motor gets. I jumped the fan with a 12V source and it still won't turn on, so suspecting it's the fan motor itself.

Anyone help me out with where to purchase a new fan? Number off the motor is 1120572. Fan is about 18" in diameter. See attached pic.
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Old 08-21-2015, 06:33 PM   #2
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Remove the fan and look for markings as to how powerful it is. You don't want to install a smaller capacity fan. If you take it to a auto parts store, they can probably set you up with a equivalent fan. You did jump both the 12 v (+) and ground, right? Bad grounds can cause a lot of issues.
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Old 08-21-2015, 06:48 PM   #3
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Rock Auto has a replacement motor for the fan, the although the number you list does not match what on the website


Its listed under A/C condenser fan


RockAuto Parts Catalog


Looks like Autozone carries a fan also


http://www.autozone.com/cooling-heat...0919_995341_0/
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Old 08-21-2015, 09:42 PM   #4
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Old 08-22-2015, 12:03 PM   #5
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RockAuto's website is not very navigation friendly. Gave up with them.

But I did find a 16" Phoenix Mobile Air part # 720-79235. At the time of this posting, you can get them on eBay for $45 with free shipping. The mounts it comes with isn't correct, so I'm hoping the mounts off my old fan will slide into the same grooves.
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Old 08-22-2015, 01:02 PM   #6
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An 18" diameter fan is about 254 sq. in in area. A 16" fan is about 200 sq. in. That's quite a reduction in area the fan can pull air through. 18" fans seem rare, but it's a big RV with a big engine. You could ask in some of these yards:

RV Salvage/Surplus Yards (List) Updated 8/1/15 - RV Forums - myRVparks.com

Or you could mount two or more fans that will give you the square inches you need to replace the 18" fan.
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Old 08-22-2015, 10:51 PM   #7
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If you measure the blades themselves, it's a 16" fan. If you measure it with the housing, it's closer to 18". So not sure if it's a 16" or 18"? Anyway, I'll be able to compare when my order arrives.
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Old 09-01-2015, 07:16 AM   #8
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Just an update to close-out this thread. I received the $45 16" Phoenix Mobile Air part # 720-79235 condenser fan. The blades matched my old blades exactly. The mounts from my old fan slid perfectly into the slots of this fan. The left-to-right spacing of the mounts was perfect. However, the housing was smaller so the top to bottom spacing was less. So I purchased some longer bolts and some spacers and got it to fit fine. I also had to change the end of the cord. Fan works great. That project is done.
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