RV Trip Planning Discussions

Go Back   iRV2 Forums > THE OWNER'S CORNER FORUMS > Thor Industries Owner's Forum
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 11-14-2017, 08:01 PM   #1
Retired USAF
 
Vaark's Avatar


 
Thor Owners Club
Freightliner Owners Club
RV Trip Wizard
Join Date: Apr 2015
Location: Shalimar, FL
Posts: 91
M37 Furnaces

We are in a predicament at the Grand Canyon. We can't get either of our furnaces to fire up. Being from Florida, this is the first time we've tried.

Propane tank indicates full on the panel inside and the gauge on the tank.
Water heater works on propane.
Furnace circuit breakers are not popped.

What's next, the DW is freezing at night?
__________________

__________________
Bill & Kim Jump
2017 Thor Venetian M37
2016 Jeep Cherokee Limited 4x4/Toad
Vaark 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 11-15-2017, 05:51 AM   #2
Senior Member
 
nosticks's Avatar
 
Join Date: Jun 2011
Location: Citrus Springs, Fl.
Posts: 798
I could ask you many questions to help you diagnose the problem. Answer these for a start.

What brand of furnaces.
Does one thermostat control both furnaces.
Does the blower start on the furnaces but no heat is produced.
Does the furnace attempt to light but shuts down in a few seconds.
Have you used your stove burners to purge the propane lines.
Is the propane turned on at the tank.
Are you on shore power.
__________________

__________________
2017 Thor Freedom Elite 29fe
2015 Jeep Wrangler Toad
Making a smooth transition to senility for over 70 years
nosticks is offline   Reply With Quote
Old 11-15-2017, 07:44 AM   #3
Senior Member
 
Join Date: Feb 2014
Location: KY
Posts: 1,424
How cold is it getting outside? If it's going below freezing there is a potential to damage the plumbing if it freezes. The propane furnaces (you have two) in your case are supposed to protect the plumbing and keep you warm. If the temperature is in the mid 30 or more the heat pumps are more than capable of keeping you warm inside the coach. Also if you have a fireplace that has a heat setting and has a built in thermostat you can set.
When trying the furnaces does the fan start? After a few seconds do you hear a click and then the burners igniting? If you don't hear a click and the burners trying to light there an electrical problem somewhere. If you here the click and a whoosh and the system shuts down try again to relight. There are sensors in the system that will shut it down if there is an airflow issue. If you've never used the furnaces try turning the furnace off and on a few times as you may just have air in the propane lines and need to clear it out, With only the furnace and hot water using the propane it's pretty easy for that line to lose it's charge. Also try starting one furnace at a time not both until one of them lights.
Temps in the mid 30's don't really need the furnaces, the heat pumps should be more than adequate to keep you comfy.
__________________
Brenda & AL
2017 Thor Venetian, T42 "Groot"
2017 Chevy Sonic, 2014 KTM 690 Duke
z3406 is offline   Reply With Quote
Old 11-15-2017, 07:51 AM   #4
Senior Member
 
znt1186's Avatar
 
Join Date: Nov 2014
Posts: 749
You do have to make sure the lines are purged. Had an issue with one of mine not wanting to light this year, and they get used every year. Made sure the lines were purged and kept trying to restart it until the air was purged from the gas line. Yes, air can get into the lines over time occasionally. It ran great this weekend.
__________________
Zeb and Teena
2005 Mandalay, 2013 Ford Edge
znt1186 is offline   Reply With Quote
Old 11-15-2017, 06:28 PM   #5
Retired USAF
 
Vaark's Avatar


 
Thor Owners Club
Freightliner Owners Club
RV Trip Wizard
Join Date: Apr 2015
Location: Shalimar, FL
Posts: 91
Quote:
Originally Posted by nosticks View Post
I could ask you many questions to help you diagnose the problem. Answer these for a start.

What brand of furnaces.
Does one thermostat control both furnaces.
Does the blower start on the furnaces but no heat is produced.
Does the furnace attempt to light but shuts down in a few seconds.
Have you used your stove burners to purge the propane lines.
Is the propane turned on at the tank.
Are you on shore power.
1. Not sure
2. No, each has it's own
3. No
4. No
5. Induction cooktop
6. It is turned on, water heater lights up and works
__________________
Bill & Kim Jump
2017 Thor Venetian M37
2016 Jeep Cherokee Limited 4x4/Toad
Vaark is offline   Reply With Quote
Old 11-15-2017, 06:47 PM   #6
Senior Member
 
nosticks's Avatar
 
Join Date: Jun 2011
Location: Citrus Springs, Fl.
Posts: 798
The thermostats supply 12v to the furnaces. With both not working, I would look for 12v's at the furnaces, fuses, breakers. Most likely on one circuit. If you have an Atwood, it has a breaker on the furnace and a reset. Because both do not work, unlikely to be the breaker on the furnace. But stranger things have happened. The reason I think it is a 12v supply problem is that you say the blower does not come on.

Another question, have the furnaces ever worked.

Do you have a volt meter or test light and know how to use one.
__________________
2017 Thor Freedom Elite 29fe
2015 Jeep Wrangler Toad
Making a smooth transition to senility for over 70 years
nosticks is offline   Reply With Quote
Old 11-15-2017, 07:02 PM   #7
Retired USAF
 
Vaark's Avatar


 
Thor Owners Club
Freightliner Owners Club
RV Trip Wizard
Join Date: Apr 2015
Location: Shalimar, FL
Posts: 91
It's been getting down into 20's for a few hours each night. Up into the 60's during the day. This is a great time to be at the Grand Canyon! No crowds and nice crisp weather.

I'm off to recycle one of the furnaces a few times. I'll let y'all know.
__________________
Bill & Kim Jump
2017 Thor Venetian M37
2016 Jeep Cherokee Limited 4x4/Toad
Vaark is offline   Reply With Quote
Old 11-15-2017, 07:06 PM   #8
Senior Member
 
powercat_ras's Avatar
 
Winnebago Owners Club
Solo Rvers Club
Join Date: May 2015
Posts: 1,252
It might be that since you have never used your furnace that it had air in the propane line leading up to the furnace that did not get cleared out before the furnace tried to light and when into a timeout period. Explanation follows ...

When each of the propane furnaces tries to light you should hear that furnace's blower come on if 12 volt power to the furnace is good and the thermostat is calling for propane heat.

After about 15 seconds of the blower running to make sure the burner chamber is clear of propane, the furnace board should open the propane valve and generate spark to light the propane in the chamber. The board detects the presence of flame or it shuts off the propane to the furnace burner and the process repeats until the furnace is lit, or it has made three tries. If all three tries failed it will lock out for 1 hour and repeat so long as the thermostat is still calling for propane furnace heat.

To clear the lockout in less than an hour you can pull the 12 volt fuse feeding the furnace for a few minutes, and then re-insert the fuse, to reset the lockout timer in the furnace control board.
__________________
Randy - Manhattan, Kansas
2015 Vista 27N
2016 Honda HR-V
powercat_ras is offline   Reply With Quote
Old 11-15-2017, 07:55 PM   #9
Senior Member
 
Join Date: Feb 2014
Location: KY
Posts: 1,424
Bill
Does your coach have the firefly system or individual thermostats. On my coach the firefly controls the climate system: ac, heat pumps and furnaces. ??
I just assumed all the Venetians had the full Firefly control.
__________________
Brenda & AL
2017 Thor Venetian, T42 "Groot"
2017 Chevy Sonic, 2014 KTM 690 Duke
z3406 is offline   Reply With Quote
Old 11-15-2017, 08:05 PM   #10
Senior Member
 
Join Date: Feb 2014
Location: KY
Posts: 1,424
May I suggest you try calling the Thor 24/7 emergency service phone number they have been helpful to me in the past , even after normal service hours

877-855-2867
__________________
Brenda & AL
2017 Thor Venetian, T42 "Groot"
2017 Chevy Sonic, 2014 KTM 690 Duke
z3406 is offline   Reply With Quote
Old 11-15-2017, 10:07 PM   #11
Retired USAF
 
Vaark's Avatar


 
Thor Owners Club
Freightliner Owners Club
RV Trip Wizard
Join Date: Apr 2015
Location: Shalimar, FL
Posts: 91
Quote:
Originally Posted by z3406 View Post
Bill
Does your coach have the firefly system or individual thermostats. On my coach the firefly controls the climate system: ac, heat pumps and furnaces. ??
I just assumed all the Venetians had the full Firefly control.
Yes I have the FireFly system. The furnaces are controlled individually just as yours probably are.
__________________
Bill & Kim Jump
2017 Thor Venetian M37
2016 Jeep Cherokee Limited 4x4/Toad
Vaark is offline   Reply With Quote
Old 11-16-2017, 07:34 AM   #12
Senior Member
 
Join Date: Feb 2014
Location: KY
Posts: 1,424
Bill
Hopefully you've spent a warm and comfortable evening. I'm confused now. I reply #5 you stated that you have two separate thermostats and in reply #11 you're on the Firefly. Is it possible that were confusing the temperature sensors with thermostats? I'm going to pass this bit of information the Firefly folks sent me. If the heat pumps run for 20 minutes with no increase in the inside temp the system will automatically revert to furnace mode. Once in furnace mode it will not automatically revert back to heat pump.
Here is a link to my Thor Venetian thread where I have just posted a link to where you can download the Firefly Diesel Manual
2017 Venetian Experience
__________________
Brenda & AL
2017 Thor Venetian, T42 "Groot"
2017 Chevy Sonic, 2014 KTM 690 Duke
z3406 is offline   Reply With Quote
Old 11-19-2017, 07:21 AM   #13
Junior Member
 
tailwind22's Avatar
 
Join Date: Oct 2017
Posts: 25
Thanks a bunch for the fire fly manual. I was chasing the manual download and you made my life easier.
__________________
2017 Thor Venetian 37M
2012 Honda Fit Toad
A Few Air Cooled Porsches for Fun
tailwind22 is offline   Reply With Quote
Old 12-14-2017, 10:17 PM   #14
Retired USAF
 
Vaark's Avatar


 
Thor Owners Club
Freightliner Owners Club
RV Trip Wizard
Join Date: Apr 2015
Location: Shalimar, FL
Posts: 91
Sorry for leaving this so long but the problem has been fixed.
the Reset/Off switch was set to off. This is an Atwood furnace.

__________________

__________________
Bill & Kim Jump
2017 Thor Venetian M37
2016 Jeep Cherokee Limited 4x4/Toad
Vaark is offline   Reply With Quote
Reply

Tags
furnace, ace



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
Allegro Bus 37M Albret Tiffin Owner's Forum 9 12-16-2014 09:18 AM
Wasps and Atwood Furnaces bob109 MH-General Discussions & Problems 2 09-08-2012 07:30 AM
Atwood Hydro Flame Furnaces bobvau Class A Motorhome Discussions 2 11-21-2011 07:49 PM
National owners with two Atwood Furnaces Retiredblade National RV Owner's Forum 6 04-06-2011 04:26 PM
servicing refrigerators/furnaces, etc. dgmath RV Systems & Appliances 9 09-10-2010 08:16 PM

» Featured Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 01:42 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.