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 > Gear and Product 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 05-14-2021, 08:48 PM   #1
Member
 
Join Date: Mar 2017
Posts: 96
Propane overfill

Our RV service people overfilled the propane tank on our Class C. We didn't know this until we took it out on a short trip. Our stove works and the refrigerator works on LP also. The water heater and furnace will not even try to fire. Any thoughts on purging out some gas? The needle on the gauge is way past full, as far as it will go. I'm running the stove on and off when I get a chance but it gets hot on the microwave above even with the exhaust fan running so I can't just walk away and let it run for hours. The dealer is some distance away. I had them fill it while it was there being serviced. You'd expect they could fill up a tank without screwing it up wouldn't you? Any help would be appreciated.
slowlanelife is online now   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 05-14-2021, 08:59 PM   #2
Member
 
Firedog53's Avatar
 
Join Date: Jun 2014
Location: Heath, OH
Posts: 60
I assume you have an installed tank and not portable/removable ones. Regardless, the tank should be overfill proof; these have a relief valve that should operate at 80% full of capacity by venting vapor to atmosphere. Your furnace and water heater are probably furthest from the tank and will require some time to purge air from the lines and system before igniting. Turn on one at a time and give it a chance; it'll probably light and die a few times before staying operational as it purges the air.
I can't imagine it being overfilled, even by an idiot dealer; most pumping systems have shut-off regulators that automatically operate and RV tanks systems have a volume operated pressure/vapor relief set for 80% capacity.
If no joy with the above, try closing the main tank valve then s-l-o-w-l-y reopening to prevent system shock that can close in-line rupture valves. If all else fails take it to a LPG dealer that know systems; stay away from the RV dealer who may not know systems.
Your WH and furnace may not be receiving an electrical command--check the breakers...
Good luck...
__________________
2010 Tiffin Allegro Bus, 36QSP
Retired Federal Firefighter/Fire Officer
On the way...
Firedog53 is offline   Reply With Quote
Old 05-14-2021, 09:00 PM   #3
Senior Member
 
Join Date: Jul 2014
Posts: 27,486
If they over filled it, it needs repair.

It has a built in overfill device in the fill port, so it should never be over filled.

The gauge may be broken, what makes you think its over filled besides the gauge ?

There is a bleed screw on the side of the tank. That's at the full mark of the tank.

Open it and watch and listen as it hiss' gas. If it spits vapor and a small cloud of propane, then its over filled. If not, the tank is not over filled.
twinboat is offline   Reply With Quote
Old 05-14-2021, 09:07 PM   #4
Senior Member
 
Join Date: Jul 2014
Posts: 27,486
Quote:
Originally Posted by Firedog53 View Post
I assume you have an installed tank and not portable/removable ones. Regardless, the tank should be overfill proof; these have a relief valve that should operate at 80% full of capacity by venting vapor to atmosphere. Your furnace and water heater are probably furthest from the tank and will require some time to purge air from the lines and system before igniting. Turn on one at a time and give it a chance; it'll probably light and die a few times before staying operational as it purges the air.
I can't imagine it being overfilled, even by an idiot dealer; most pumping systems have shut-off regulators that automatically operate and RV tanks systems have a volume operated pressure/vapor relief set for 80% capacity.
If no joy with the above, try closing the main tank valve then s-l-o-w-l-y reopening to prevent system shock that can close in-line rupture valves. If all else fails take it to a LPG dealer that know systems; stay away from the RV dealer who may not know systems.
Your WH and furnace may not be receiving an electrical command--check the breakers...
Good luck...
Your correct in it not being overfilled but your explanation is inaccurate.

The tank has the device to stop the gas from flowing in, not the pump in the filling station

If over 80%, the relief valve does not vent to atmosphere, that would be dangerous. It would just fill to 100% and stop.
The relief valve would then vent when the liquid warmed and expanded.
twinboat is offline   Reply With Quote
Old 05-14-2021, 09:19 PM   #5
Senior Member
 
Ljwt330's Avatar
 
Join Date: Jan 2018
Location: Capistrano Beach, California
Posts: 3,391
The previous posts are correct about the remote possibility of an overfill. More important, your description is not consistent with an overfill problem.

First, your stove and refrigerator both work, that means gas is flowing from the tank.

Second, you have a system regulator, just after the tank valve, that reduces pressure throughout the system to 0.39 psi. That will not change regardless of pressure in the tank.

Third, both the water heater and furnace have an electronic ignition. Can’t say if your comment about neither even trying to fire was just hyperbole, but if neither makes a “ticking” sound when first turned ON, then it is an electrical issue, not gas. As Firedog53 posted, they may not be getting 12v.

You need to trouble shoot the water heater and furnace and clearly report exactly what happens, or doesn’t happen, including any lights or sounds, when you turn them ON.
__________________
Larry, Eileen, and Finley
2004 Alpine 36FDDS
Third motor home, first Alpine, no need for another.
Ljwt330 is offline   Reply With Quote
Old 05-14-2021, 09:35 PM   #6
Senior Member
 
Join Date: Nov 2015
Posts: 16,417
Quote:
Originally Posted by Ljwt330 View Post
The previous posts are correct about the remote possibility of an overfill. More important, your description is not consistent with an overfill problem.

First, your stove and refrigerator both work, that means gas is flowing from the tank.

Second, you have a system regulator, just after the tank valve, that reduces pressure throughout the system to 0.39 psi. That will not change regardless of pressure in the tank.

Third, both the water heater and furnace have an electronic ignition. Canít say if your comment about neither even trying to fire was just hyperbole, but if neither makes a ďtickingĒ sound when first turned ON, then it is an electrical issue, not gas. As Firedog53 posted, they may not be getting 12v.

You need to trouble shoot the water heater and furnace and clearly report exactly what happens, or doesnít happen, including any lights or sounds, when you turn them ON.
Along with Brand/Model of furnace and water heater


Course could just be propane has not been fully established at either ---furnace and/or water heater and my just need several attempts at lighting

Provided that the spark electrodes are firing CLICK, CLICK, CLICK
__________________
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 05-15-2021, 09:51 AM   #7
Member
 
Firedog53's Avatar
 
Join Date: Jun 2014
Location: Heath, OH
Posts: 60
Quote:
Originally Posted by twinboat View Post
Your correct in it not being overfilled but your explanation is inaccurate.

The tank has the device to stop the gas from flowing in, not the pump in the filling station

If over 80%, the relief valve does not vent to atmosphere, that would be dangerous. It would just fill to 100% and stop.
The relief valve would then vent when the liquid warmed and expanded.
I've seen pumping stations with a pump shutoff that occurs when the OPD operates. Many don't have this feature.

Where else would the relief valve vent to other than atmosphere? Isn't its purpose to get rid of the excess pressure to/in the tank? Lesser of two evils, so to speak...
That's why LPG tank compartments are not fully enclosed; so that vapors can escape and be diluted without a bad event; liquid bad, vapor good. I think we're on the same track, just different ways of expression...!
__________________
2010 Tiffin Allegro Bus, 36QSP
Retired Federal Firefighter/Fire Officer
On the way...
Firedog53 is offline   Reply With Quote
Old 05-15-2021, 11:42 AM   #8
Senior Member
 
Join Date: Nov 2015
Posts: 16,417
Quote:
Originally Posted by Firedog53 View Post
I've seen pumping stations with a pump shutoff that occurs when the OPD operates. Many don't have this feature.

Where else would the relief valve vent to other than atmosphere? Isn't its purpose to get rid of the excess pressure to/in the tank? Lesser of two evils, so to speak...
That's why LPG tank compartments are not fully enclosed; so that vapors can escape and be diluted without a bad event; liquid bad, vapor good. I think we're on the same track, just different ways of expression...!
I think 'twinboat' was clarifying LP tank features/components
OPD...Overfill Protection Device----part of Fill Valve---shuts off propane liquid flow at 80% tank capacity

Overfilling would not cause relief valve to open
Overfilling and then pressure increase due HEAT (ambient air temps/sun) and lack of head space will cause it to open

Excess Flow Device......trips/limits propane vapor flow thru system due to imbalance in pressures
Opening Service valve too quickly trip it ----SLOWLY opening service vapor valve allows system pressure on both sides of LP Reg to equalize

Same train of thought...just correction of nomenclature



Which OP would respond to questions
__________________
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 05-15-2021, 02:40 PM   #9
Senior Member
 
Bigd9's Avatar


 
Join Date: Jun 2012
Location: The Bluegrass State
Posts: 7,010
Quote:
Originally Posted by slowlanelife View Post
Our RV service people overfilled the propane tank on our Class C. We didn't know this until we took it out on a short trip. Our stove works and the refrigerator works on LP also. The water heater and furnace will not even try to fire. Any thoughts on purging out some gas? The needle on the gauge is way past full, as far as it will go. I'm running the stove on and off when I get a chance but it gets hot on the microwave above even with the exhaust fan running so I can't just walk away and let it run for hours. The dealer is some distance away. I had them fill it while it was there being serviced. You'd expect they could fill up a tank without screwing it up wouldn't you? Any help would be appreciated.
You have gotten some great responses here Slowlanelife. What is your status right now? Still having problems? What RV do you have?
__________________
Good Luck, Be Safe and Above All, Don't Forget To Have Fun
Pete
Central Kentucky
2006 Fleetwood Discovery 35H, 2014 Honda CR-V, M&G Engineering Braking System
Bigd9 is offline   Reply With Quote
Old 05-15-2021, 02:55 PM   #10
Senior Member
 
Join Date: Jul 2014
Posts: 27,486
Quote:
Originally Posted by Firedog53 View Post
I've seen pumping stations with a pump shutoff that occurs when the OPD operates. Many don't have this feature.

Where else would the relief valve vent to other than atmosphere? Isn't its purpose to get rid of the excess pressure to/in the tank? Lesser of two evils, so to speak...
That's why LPG tank compartments are not fully enclosed; so that vapors can escape and be diluted without a bad event; liquid bad, vapor good. I think we're on the same track, just different ways of expression...!
The relief valve is set around 375 PSI.

The fill stations pump relief valve will be set much lower then that, no more then 200 PSI.

Both the bulk tank and RV tank are at near the same PSI, unless the RV tank was totally empty.
As the liquid is pumped in, any vaporized gas will turn back to liquid at between 100 and 200 PSI, so no PSI rise.

When the overfill valve closes, the liquid stops at the fill valve and the pump just recirculates the liquid back to the bulk tank.
twinboat is offline   Reply With Quote
Old 05-15-2021, 09:51 PM   #11
Member
 
Firedog53's Avatar
 
Join Date: Jun 2014
Location: Heath, OH
Posts: 60
Yep, we're all just syntaxing (is that a word?).

Also wish OP would check back in. Maybe he ignited...?
__________________
2010 Tiffin Allegro Bus, 36QSP
Retired Federal Firefighter/Fire Officer
On the way...
Firedog53 is offline   Reply With Quote
Old 05-16-2021, 07:29 AM   #12
Member
 
Join Date: Mar 2017
Posts: 96
Thanks for all your help. Yesterday I had time to to try some of the suggestions. I opened the bleeder valve and got the hissing but no vapor so the tank is not overfilled as I thought. With the water heater I am getting the clicking as it tries to light but it doesn't light. I haven't actually used it on gas in a very long time, only on electric, so that issue may be from lack of use. The reason we were at the dealer in the first place was to have the AC/Heatpump replaced. The furnace, which we had used fairly recently, doesn't click/ try to light. When I switch to furnace on the themostat I can hear the click by the furnace like I normally would. Then after 15 seconds or so it would click and try to light, but it does not do that. Fuse and breakers are ok. Maybe the AC replacement goofed something up there. I will take it back to have them look at the furnace and water heater. It may take awhile to get back in as they are very busy but luckily I can get along without these two components. I will report back here when things are resolved. When I had emailed the service people with my thoughts that it was overfilled they emailed back that I should try to get the pressure down by running the stove. If they'd told me it was nearly impossible to overfill and to check that bleeder valve it would have spared me some anxiety. I'm grateful we have the forum to turn to at times like this and I appreciate all the help and suggestions.
slowlanelife is online now   Reply With Quote
Old 05-16-2021, 07:33 AM   #13
Member
 
Join Date: Mar 2017
Posts: 96
Sorry, forgot to add that this is a Class C with a permanent tank.
slowlanelife is online now   Reply With Quote
Old 05-16-2021, 08:26 AM   #14
Senior Member
 
Join Date: Nov 2018
Location: Beaver Dam, Wisconsin
Posts: 2,105
Troubleshooting

Old Biscuit is the resident authority on propane appliances. I just pretend I know what is going on.

Water heater:

It sounds like different problems with water heater and furnace. Water heater clicking indicates it has 12 volt supply and is trying to light. If the burner does not light it will cycle through the start sequence 3 times then fault. Turn it off. Turn it on it will repeat.

Gas valve opens often causing a click.
Spark igniter sparks causing loud clicks.
Burner lights.
Heat from flame heats sensor.
Gas valve stays open if heat detected. Gas valve closes if no heat detected.

Burner tubes in the heater may be plugged. Little creatures like to make homes in them. Even a small spider can block the gas mixing tube and prevent ignition. Clean it out and try again.

Observe the starting sequence from close up. Have someone turn it off and then back on while you watch the burner.
Does the gas valve click open?
Does spark igniter spark?
Does flame appear?

Furnace:

Furnace fan runs for a few seconds.
Gas valve opens.
Igniter clicks.
Gas flame ignites.
Heat sensor reports heat. Furnace continues to run.
Like the water heater, furnace will try to start 3 time and then fault.
Turn it off and on to reset.

Closely observe the starting sequence. Where does it fail?

It sounds like you reported that the furnace fan does not run. If so, the furnace may not be getting 12 volts or thermostat is not working.
__________________
Paul Bristol
Kodiak Cub 176RD
Nissan Pathfinder 2015
Persistent is offline   Reply With Quote
Reply

Tags
propane



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
Propane overfill? No gas heat motohomo Winnebago Industries Owner's Forum 9 12-31-2016 11:32 PM
fresh water overfill kalynzoo Winnebago Industries Owner's Forum 7 05-18-2007 02:03 PM
W22 axle seal leak - overfill John350 Workhorse and Chevrolet Chassis Motorhome Forum 6 05-02-2007 06:37 PM
Don't Overfill Your 6 volt Batteries 56Nomad Toy Haulers Discussion 7 09-28-2006 05:48 PM


All times are GMT -6. The time now is 07:38 PM.


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