RV Trip Planning Discussions

Go Back   iRV2 Forums > THE OWNER'S CORNER FORUMS > Monaco Owner's Forum
Click Here to Login

Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
Thread Tools Search this Thread Display Modes
Old 07-16-2015, 03:34 PM   #1
Junior Member
Join Date: Jul 2015
Posts: 6
Monaco Dynasty fan speed

I don't appear to be getting high fan speed on my 01' Dynasty with side mount radiator and its causing a hot running condition. Has anyone ran into this?

RyanG is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 07-16-2015, 05:34 PM   #2
Senior Member
jacwjames's Avatar
Monaco Owners Club
Join Date: Jun 2014
Posts: 5,521
Do a search for Wax Valve.

The speed of the fan is controlled by a wax valve, when the coolant gets hot the wax valve allows more hydraulic fluid to the motor and either opens a port there or simply supplies more oil.

There have been several recent posts.

Here is a parts page for my coach which is probably set up just like yours, the thermo valve is located on the radiator, top left corner looking from underneath, it has 2 small hydraulic lines running to it.

The valve is listed as the Thermo Valve B5531-09857-210, it is not shown on the picture. Do a search for this on IRV2, I read one a while back that had a source out of UK for ~$250. Do some searches on the Wax valve on IRV2 and you'll find more info.
Attached Files
File Type: pdf 1 Engine Fan Cooling.pdf (78.4 KB, 77 views)

Jim J
2002 Monaco Windsor 38 PKD
2005 Jeep Grand Cherokee w/5.7 Hemi
jacwjames is online now   Reply With Quote
Old 07-17-2015, 08:46 AM   #3
stich's Avatar
Monaco Owners Club
Join Date: Aug 2012
Posts: 82
Yes, I believe I have/had the same problem in my '98 Exec. I had elevated temps the whole two weeks that I was on vacation but upon return, I went to drive it to my mechanic and couldn't duplicate the problem. I suspect that it started running the high speed OK now. I don't trust it anymore but don't want to replace that $$$$$$$$$$$$ part for no positive reason.
Jack & Dianna Purdue
1998 Monaco Executive 40'
2007 HD Ultra Classic- summer toad
stich is offline   Reply With Quote
Old 07-17-2015, 09:02 AM   #4
Moderator Emeritus
Mike Canter's Avatar

Join Date: Apr 2008
Location: Freeport, ME
Posts: 4,707
Here is a quick test to see if the wax valve is working. First before you remove either of the -6 hydraulic lines from the wax valve you need to mark them as to which one goes on which fitting. Not sure what the size of the hoses are, I can't remember but you need three fittings to test the fan. You need two block offs that you can put on the ends of both hoses and a joiner to join the two lines together. If you mark and then pull off both hoses and install plugs in the hoses stopping flow then the fan should run at max speed. Then take the plugs out and join the two hoses together and the fan will run at slow speed. If that works both those ways then the problem is in the wax valve. If the fan doesn't change speed then the problem is in the fan controller.
Mike Canter
"Gunner" USN Retired, Airdale
2004 Monaco Signature 44' Conquest. Detroit 60
Mike Canter is offline   Reply With Quote

fan, monaco

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Looking to purchase a 1996 Monaco Dynasty 40' Allgood Monaco Owner's Forum 0 04-19-2015 07:23 PM
Compare: 2007 CC Intrigue & Monaco Dynasty Emp IV Forza4us Country Coach Owners Forum 5 03-30-2015 10:00 PM
2015 Monaco Dynasty tricotec Monaco Owner's Forum 32 10-21-2014 07:38 PM
Side Radiator Fan Speed HicksRA MH-General Discussions & Problems 17 06-29-2014 02:25 PM
Coleman Roof Air Fan Speed duncanracing Class A Motorhome Discussions 2 06-04-2014 07:58 PM

» Featured Campgrounds

Reviews provided by

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 06:46 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.