Go Back   iRV2 Forums > MOTORHOME FORUMS > MH-General Discussions & Problems
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  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 02-13-2016, 06:34 AM   #1
Senior Member
 
davismills's Avatar
 
Join Date: Jul 2011
Posts: 242
Rear Heater Issue

I have a Mor Aid rear heater in my Winnebago 2011 Sightseer 33C. Recently, I noticed that the rocker switch lights were not illuminated, nor would the fan operate. Traced to a bad fuse, replaced and the fan then worked in both low and high speeds.

I went down to the storage facility and started the motor home and discovered that the fuse had blown again. Keep in mind, that the unit is winterized and the water heater is in bypass.

I had no time for troubleshooting at that time, so will return for more troubleshooting later. When I replace the fuse and the fan works (temporarily) there appears to be no binding noises at all. I've searched all the threads on this subject and nothing seems to address this issue directly. There appeared to be one helpful thread, but all the pictures had been deleted.

Advice welcome. Love this forum and all the helpful folks.
__________________

__________________
Dave and Holly
2011 Winnebago Sightseer 33c with a 2011 Honda CRV behind.
davismills 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 02-13-2016, 09:55 AM   #2
Senior Member
 
ChasA's Avatar
 
Join Date: Mar 2007
Location: Apex, NC
Posts: 1,857
It's called Motor aid, not Mor aid.
First, verify that the fuse is the correct size.
If it is, I suggest you put an ammeter in the circuit and measure the amperage the fan motor is drawing. Do this first at the motor. If the amperage is less than the fuse rating, repeat the test at the switch. If you get a higher reading here, you've got a short in the wiring somewhere between the switch and the fan motor.
__________________

__________________
2010 Winnebago Journey Express 34Y
2010 Freightliner XCS (mfd 9/'09)
'07 Saturn Vue V6
ChasA is offline   Reply With Quote
Old 02-13-2016, 12:25 PM   #3
Senior Member
 
davismills's Avatar
 
Join Date: Jul 2011
Posts: 242
Quote:
Originally Posted by ChasA View Post
It's called Motor aid, not Mor aid.
First, verify that the fuse is the correct size.
If it is, I suggest you put an ammeter in the circuit and measure the amperage the fan motor is drawing. Do this first at the motor. If the amperage is less than the fuse rating, repeat the test at the switch. If you get a higher reading here, you've got a short in the wiring somewhere between the switch and the fan motor.
Thanks! I will proceed with this great advice soonest. I did verify the fuse as this is the second time I've replaced it. 10 amp.
__________________
Dave and Holly
2011 Winnebago Sightseer 33c with a 2011 Honda CRV behind.
davismills is offline   Reply With Quote
Old 02-14-2016, 07:39 PM   #4
Senior Member
 
Join Date: Apr 2015
Location: Rogers, AR
Posts: 435
I you can get to it, spin the fan with your finger to see if it spins freely. If it drags, it may run but burn the fuse after it runs a while because it's drawing too much current.
__________________
2017 Fleetwood Discovery 40D w/2012 CRV toad
alank is offline   Reply With Quote
Old 02-14-2016, 07:45 PM   #5
Senior Member
 
cbeierl's Avatar
 
Winnebago Owners Club
Freightliner Owners Club
Join Date: Aug 2005
Location: Nashua, NH
Posts: 2,002
My understanding is that a number of folks with older vehicles have had problems with the fan sticking and blowing the fuse. I would recommend getting access to the fan to check it out.
__________________
Chris Beierl

2005 Winnebago Vectra 36RD
cbeierl is online now   Reply With Quote
Old 02-16-2016, 10:55 PM   #6
Senior Member
 
Ray,IN's Avatar
 
Join Date: Aug 2001
Location: North America somewhere
Posts: 13,699
Rent, borrow, or buy an AC/DC inductive ammeter and determine ampere draw of the unit while running. It clamps around pos. wire and reads current draw/flow through the circuit. It may be left in-place to constantly measure current draw from start-up to when the fuse blows.
__________________
2000 Winnebago Ultimate Freedom USQ40JD, ISC 8.3 Cummins 350, Spartan MM Chassis. USA 1SG, retired;PPA,Good Sam Life member,FMCA."We the people are the rightful masters of both the Congress and the Courts - not to overthrow the Constitution but to overthrow men who pervert the Constitution. "Abraham Lincoln"
Ray,IN is offline   Reply With Quote
Old 03-06-2016, 08:40 AM   #7
Senior Member
 
davismills's Avatar
 
Join Date: Jul 2011
Posts: 242
Wrong fuse size

I keep blowing 10 amp fuses with this problem and looked up the voltage for the fan and lo and behold it's a 15 amp switch/fan. I really don't know why the factory put in a 10 amp fuse. Shoot me down if my reasoning is wrong. Definitely not an electrician. Nothing else appear to be wired to the same fuse.
__________________
Dave and Holly
2011 Winnebago Sightseer 33c with a 2011 Honda CRV behind.
davismills is offline   Reply With Quote
Old 03-06-2016, 08:43 AM   #8
Senior Member
 
davismills's Avatar
 
Join Date: Jul 2011
Posts: 242
Here's a link to the switch. 15 Amp switch
__________________
Dave and Holly
2011 Winnebago Sightseer 33c with a 2011 Honda CRV behind.
davismills is offline   Reply With Quote
Old 03-07-2016, 03:36 PM   #9
Senior Member
 
Workhorse Chassis Owner
Join Date: Jun 2003
Location: Palisade CO
Posts: 3,562
It's a known issue. The motor seizes up because the fan shifts to one end and binds. Mine did it at about 6 years.
On mine there were three other items connected to the same fuse including the auto step retraction signal lead and the backup monitor. Removing it was going to be a major pain because it was located way back against the wall and the water heater would have to be removed to access it. I had used it maybe twice in the six years since I bought the motor home in 2004 so pulled the dash switch out (it is just snapped into the dash and comes out easily) and unplugged the connector and put the switch back in place. I did that so I wouldn't inadvertently turn the fan on and blow the fuse again.
__________________

__________________
Clay WA5NMR - Ex Snowbird - 1 year, Ex Full timer for 11 years - 2004 Winnebago Sightseer 35N Workhorse chassis. Honda Accord toad.
Clay L is offline   Reply With Quote
Reply

Tags
heat, heater



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
Rear TV Cable Problem laheze Monaco Owner's Forum 3 11-30-2015 10:33 AM
Fiberglass Rear lower body fenders and front and rear access doors breaking loose bruce Dixon Winnebago Industries Owner's Forum 2 05-14-2015 06:16 PM
New water heater woodworker414 Class C Motorhome Discussions 2 06-02-2014 06:28 AM

» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 03:30 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.