RV News RVBusiness 2021 Top 10 RVs of the Year, plus 56 additional debuts and must-see units → ×
RV Trip Planning Discussions

Go Back   iRV2 Forums > MOTORHOME FORUMS > Class A Motorhome Discussions
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 10-05-2017, 12:38 PM   #1
Senior Member
draboo's Avatar
Holiday Rambler Owners Club
Join Date: May 2013
Location: North Myrtle Beach, SC
Posts: 362
2002 HR Neptune 34PPD DP Low Coolant Light

Coming back from Michigan to SC the low coolant light kept coming on intermittently. I checked the level and it was right between the upper and lower limits on the tank.

Could this be caused by a bad radiator cap? Or maybe the sensor itself is bad. I can see the sensor on the side of the tank. I giggled the electrical connections to it and it didn't help.

The only radiator cap I could find was a 13 lb . It takes a 10 lb. Not sure if this will effect the cooling system significantly.

Cumming ISB 275 engine.
Brad and Pat, the Dad and Mom-Dawgs with Kiddo and Dinah-Mite, the Dawter-Dawgs full timin' in our 2002 HR Neptune DP with 2017 Grand Caravan toad
draboo 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 10-05-2017, 04:05 PM   #2
Senior Member
BFlinn181's Avatar
Gulf Streamers Club
Join Date: Jan 2012
Location: Cincinnati
Posts: 19,926
The sensors can go bad. A sure test would be to fill the overflow tank to the top and see if the light goes out. You might have to check the tank as soon as the light shows, to be sure the radiator system hasn't absorbed more coolant and reduced the level. Also, 'giggling' the wires, does that mean you told them jokes? tickled them? You might disconnect them and clean the contacts.

If your engine requires a 10 lb radiator cap, Google shows lots of results for a "10 PSI radiator cap." A 13 PSI cap should allow a slightly higher temperature than the 10 PSI cap, as the 10 would lower the boiling point of the coolant temperature. I'd make sure you have the proper cap, perhaps a previous owner put the 10 PSI cap on for some reason.

Bob & Donna
'98 Gulf Stream Sun Voyager DP being pushed by a '00 Beetle TDI
BFlinn181 is offline   Reply With Quote


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
Low Coolant Light on but Coolant is not low Jfreeman Monaco Owner's Forum 21 07-18-2017 06:37 PM
2002 HR Neptune 34PPD shock absorbers draboo Class A Motorhome Discussions 2 06-23-2017 07:34 PM
2002 Neptune vs Knight? Differing NADA values? wihakowi Monaco Owner's Forum 1 08-03-2013 03:50 PM
2002 holiday rambler neptune 69340 National RV Owner's Forum 5 05-01-2012 12:07 AM
2002 Neptune Freebird23 Roadmaster Motorhome Chassis Forum 6 08-03-2009 04:26 PM

All times are GMT -6. The time now is 05:02 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.