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.
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 04-04-2017, 06:24 PM   #1
Senior Member
 
Vicr's Avatar
 
Join Date: Dec 2016
Location: Snohomish, WA
Posts: 173
Girard Water Heater tried to light/ no water

I'm out washing the Precept and turn coach power on to bring the awning in and the water heater is trying to light! It's parked in the driveway with no water connected so no water flow. It's an Girard tankless On Demand system so this makes no sense. Any ideas?
Vicr 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 04-04-2017, 08:13 PM   #2
Senior Member
 
BFlinn181's Avatar
 
Gulf Streamers Club
Join Date: Jan 2012
Location: Cincinnati
Posts: 19,926
Just a guess, but with no water in the lines, there's no pressure. The water heater is 'on demand,' meaning it's switched when it senses a drop in pressure in the water line. Either pull the fuse or find the power switch and turn it off.
__________________

Bob & Donna
'98 Gulf Stream Sun Voyager DP being pushed by a '00 Beetle TDI
BFlinn181 is offline   Reply With Quote
Old 04-04-2017, 09:02 PM   #3
Senior Member
 
Vicr's Avatar
 
Join Date: Dec 2016
Location: Snohomish, WA
Posts: 173
Quote:
Originally Posted by BFlinn181 View Post
Just a guess, but with no water in the lines, there's no pressure. The water heater is 'on demand,' meaning it's switched when it senses a drop in pressure in the water line. Either pull the fuse or find the power switch and turn it off.
I did turn it off but that doesn't solve the problem of why it tried to light when there was no water connected to the coach or in the tank. It shouldn't have tried to fire off. That's what the question is. Why?
Vicr is offline   Reply With Quote
Old 04-04-2017, 09:38 PM   #4
Senior Member
 
BFlinn181's Avatar
 
Gulf Streamers Club
Join Date: Jan 2012
Location: Cincinnati
Posts: 19,926
How would the WH sense the lines were empty? If, as I suggested, the WH fires up when it detects a pressure drop in the system, no water means no pressure. (actually 14.7 PSI - one atmosphere)

Here's a link to a Girard Tankless water heater manual.
__________________

Bob & Donna
'98 Gulf Stream Sun Voyager DP being pushed by a '00 Beetle TDI
BFlinn181 is offline   Reply With Quote
Old 04-04-2017, 10:46 PM   #5
Senior Member
 
Vicr's Avatar
 
Join Date: Dec 2016
Location: Snohomish, WA
Posts: 173
Quote:
Originally Posted by BFlinn181 View Post
How would the WH sense the lines were empty? If, as I suggested, the WH fires up when it detects a pressure drop in the system, no water means no pressure. (actually 14.7 PSI - one atmosphere)

Here's a link to a Girard Tankless water heater manual.
There can't be a pressure change when the water lines are empty. There wasn't a tornado or any other atmospheric change to cause the water heater to sense a change in pressure. You comments are not relevant or useful and I did read the manual thank you. If you can't answer my question in my original post please don't post conjecture, hyperbole and infer I can't read an owners manual, thank you.
Vicr is offline   Reply With Quote
Old 04-04-2017, 11:33 PM   #6
Senior Member
 
Join Date: Nov 2015
Posts: 13,969
Water flow sensor/Air flow sensor......plugs into right side of control board

Unplug connector and clean up with electrical spray cleaner.

Nothing can happen unless flow meters make up so either bad sensor or bad connection

See pg 22
https://www.manualslib.com/manual/11...page=22#manual
__________________
Is it time for YOUR Medication or Mine?
Dodge 3500 w/Tractor Motor & NUWA 5vr
US NAVY---USS Decatur DDG-31
Old-Biscuit is offline   Reply With Quote
Old 04-04-2017, 11:45 PM   #7
Senior Member
 
BFlinn181's Avatar
 
Gulf Streamers Club
Join Date: Jan 2012
Location: Cincinnati
Posts: 19,926
Quote:
Originally Posted by Vicr View Post
There can't be a pressure change when the water lines are empty. There wasn't a tornado or any other atmospheric change to cause the water heater to sense a change in pressure. You comments are not relevant or useful and I did read the manual thank you. If you can't answer my question in my original post please don't post conjecture, hyperbole and infer I can't read an owners manual, thank you.
Wow, what a hostile reply. I didn't suggest there was a change in air pressure, just that the air pressure would be below the threshold pressure that would trigger the WH to come on. The first sensor in the WH water inlet is a pressure sensor. It most likely uses a pitot tube that senses water flow by a difference in water pressure that drops as it passes by the tube compared to a static pressure chamber in the sensor. Airplanes and boats use pitot tubes to measure speed by the pressure changes in the fluid in which they are traveling.

Fact is, when water system is drained, the water heater should be shut off or have the fuse pulled to prevent accidental turn on in an empty system.

I in no way inferred you hadn't read the manual, I was just providing a link to the manual that might have provided you the answer to your own question. I'll not argue with you, I've always believed Mark Twain's saying, "Never argue with a fool, onlookers may not be able to tell the difference."
__________________

Bob & Donna
'98 Gulf Stream Sun Voyager DP being pushed by a '00 Beetle TDI
BFlinn181 is offline   Reply With Quote
Old 04-06-2017, 09:33 AM   #8
Junior Member
 
Join Date: Sep 2012
Posts: 11
Girard water heater

I have an idea!
Call Girard Tech support for assistance.
866-559-1221, then press "1"
jrnert is offline   Reply With Quote
Old 04-12-2017, 10:13 PM   #9
Senior Member
 
Vicr's Avatar
 
Join Date: Dec 2016
Location: Snohomish, WA
Posts: 173
Quote:
Originally Posted by jrnert View Post
I have an idea!
Call Girard Tech support for assistance.
866-559-1221, then press "1"
I did. They are great and we are working thru it. They haven't had this problem yet.
Vicr is offline   Reply With Quote
Reply

Tags
heat, heater, light, water, water 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
Has anyone tried anything like this for Girard awning lights? brobox Entegra Owner's Forum 13 07-28-2014 05:30 PM
Girard Tankless Water Heater Daybreak3295 Class A Motorhome Discussions 3 09-21-2013 06:26 PM
Girard Tankless water heater rsnider Forest River Owners Forum 28 08-24-2013 07:12 AM
Girard Tankless Water Heater RVBulldog MH-General Discussions & Problems 4 08-31-2012 08:58 AM
Girard tank less hot water heater poorfarmer RV Systems & Appliances 9 02-28-2012 08:51 AM


All times are GMT -6. The time now is 09:22 AM.


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