Free 7 Day Trial RV GPS App RV Trip Planner Campground Reviews RV Maintenance Free 7 Day Trial ×
RV Trip Planning Discussions

Go Back   iRV2 Forums > RV SYSTEMS AND TECHNOLOGIES FORUMS > RV Systems & Appliances
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 09-18-2021, 01:45 PM   #1
Junior Member
 
Join Date: Sep 2012
Location: Tampa, FL
Posts: 3
Onan coolant temp sender

Onan 8KW Quiet Diesel model HDKAK
Have fault code 3-24 which is Coolant Temperature Sender Fault.
Where is the Temp Sender physically located? Is it near the coolant fill? or the radiator? or elsewhere?
Thanks.
Mike1944 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 09-18-2021, 02:26 PM   #2
Senior Member
 
ziaptrn's Avatar


 
Newmar Owners Club
Spartan Chassis
Join Date: Mar 2004
Location: Las Cruces, NM
Posts: 290
Water Temp Sensing Unit

The sensing unit is located on the top of the rear of the generator when you stand looking from the front of the rig to the rear.
To access the sending unit, you must remove the top panel of the generator set. The top isn't hard to remove - a bunch of 10mm bolts - if the generator is on a slide or has access. I'm not sure about generators that are bolted in-place in the front of the rig.

The first pic below is of the sensor itself; the second is a picture of the location after the top panel has been removed....you can see where someone has taken a photo of a drill bit making a hole in the fairing/cover. The white wire goes to the tip of the sensor, and in the photo the thermostat has been removed.

In order to access the sensor to remove it, I made a big hole in the fairing/cover to allow access straight over it using a socket and a short extension. The space is very tight and the sensors are usually a bear to remove with just a wrench from the side.

I soaked the sensor on ours for 3 days with PB Blaster, then heated it with an electric heat gun (didn't have a propane torch). Immediately after heating, I oh-so-slightly turned the sensor clockwise as if to tighten, just until I felt it begin to move. Then, reverse direction of ratchet counterclockwise to remove and it came right out.

When replacing, I did put a small dab of non-seize on the new one before snugging it down.

Most folks recommend checking and possibly replacing all hoses while you are in there. I also replaced the thermostat and gasket.

After replacing the sensor and before buttoning everything up, I used two layers of alumimum ductwork tape to cover the hole that I made, facing several pieces sticky side in. Air flow is critical to the generator, and I made sure to put several layers and ensure that there was a good seal all the way around.

I hope this helps.....there are a lot of threads on replacement of the sensor if you search here on irv2 for onan overheating.

John
Attached Thumbnails
Click image for larger version

Name:	OnanTempSensor002.jpg
Views:	4
Size:	59.6 KB
ID:	343494   Click image for larger version

Name:	OnanTempSensor001.jpg
Views:	5
Size:	80.7 KB
ID:	343495  

__________________
John S
2004 Newmar Mountain Aire 4301 DP
Cummins ISL 400 8.9L
Towing 2006 Honda CR-V
ziaptrn is offline   Reply With Quote
Old 09-18-2021, 03:16 PM   #3
Junior Member
 
Join Date: Sep 2012
Location: Tampa, FL
Posts: 3
Water Temp Sensing Unit

Thank you John for such a complete and detailed reply. This helps a lot!!!
Mike
Mike1944 is offline   Reply With Quote
Old 09-18-2021, 10:11 PM   #4
Senior Member
 
Ray,IN's Avatar
 
Join Date: Aug 2001
Location: North America somewhere
Posts: 24,411
There is another thread here explaining a modification when the OEM sensor would not turn. He moved the new one into the gooseneck part.
__________________
2000 Winnebago Ultimate Freedom USQ40JD, ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX,Infantry retired;Good Sam Life member,FMCA." My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy
Ray,IN is offline   Reply With Quote
Reply

Tags
onan



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
Where is the Temp Sender? PaulO Cummins Engines 5 04-04-2011 09:29 AM
Trans temp Gauge Sender pediajo Class A Motorhome Discussions 1 03-18-2011 09:45 PM
Temp Sender Placement cannon man Workhorse and Chevrolet Chassis Motorhome Forum 0 06-02-2010 05:47 PM
Engine temp gauge sender ehartz iRV2.com General Discussion 2 03-25-2007 12:30 AM
V-10 Water temp gauge sender Dyno Bill MH-General Discussions & Problems 1 10-07-2005 06:10 PM

» Featured Campgrounds

Reviews provided by


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


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, vBulletin Solutions, Inc.