Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×

Thread Tools Search this Thread Display Modes
Old 03-31-2023, 02:21 PM   #1
Winnebago Watcher
Join Date: Mar 2023
Posts: 2
Vista Furnace Issues

My furnace cuts out sometimes. The only fix so far is to remove the fuse and reinsert it. May be tied to generator starting up (?) Anyone else run into this and have a solution? Thx
DougEberhard is offline   Reply With Quote
Old 03-31-2023, 03:12 PM   #2
Winnebago Master
Join Date: Nov 2018
Location: Pflugerville/Austin, Tx
Posts: 6,076
Can you give some more info on the problem?
It is always helpful to know what furnace type and what RV but then more info on what you mean it "cuts out" will be good. It might be that the generator cranking makes the 12VoltDC go low and the furnace doesn't like that or is it the blower motor slows way down??
Normally, I can't think of anything the generator does that should bother the furnace enough to notice.
But there are lots of different furnaces and ways to use them so we need more info on what you have.
Morich is offline   Reply With Quote
Old 03-31-2023, 04:31 PM   #3
Winnebago Watcher
Join Date: Mar 2023
Posts: 2
Vista Furnace Issues

I'll try to be more clear. The furnace turns off (blower, everything) and won't re-start until I unplug the fuse in the main panel, and plug the fuse back in. This happens when I realize the RV is getting cold. Trying to start the furnace by cycling through the control panel to get back to heat does nothing. Your suggestion that the generator starting up draws my battery voltage down too far is intriguing. I wouldn't have thought my batteries are that weak, but perhaps that is the case. The furnace brand is Suburban by AirXcel.
DougEberhard is offline   Reply With Quote
Old 03-31-2023, 05:33 PM   #4
Winnebago Master
Join Date: Nov 2018
Location: Pflugerville/Austin, Tx
Posts: 6,076
Okay, that gives a couple ideas that "might" be involved. One is that some RV furnaces do have what they call a "lockout" after trying to light three times in a row. When you need to reset it, that kind of sounds like you are needing to reset the lockout.

On that point, do you have a furnace manual in a big bag of info that should have come with the RV? That might be the easy way to go for info on any reset your brand of furnace may have.
If manual not on hand, I think this may be one of the more common furnaces, so may match what you need?

The idea of the weak battery may be something to keep in mind if it continues to be a problem.
But there is one way to assure the battery supply is not going to be weak when starting the generator. Thinking of the starter as using a lot of power suddenly when we start any engine, if we think it "might" be a weak battery situation, one way to do away with that question, is to start the RV engine first.

Without knowing which year and model of Viasta, we can't look at drawings to say for sure what system you have but all Winnebago I've looked at had a system to tie the coach batteries and chassis/start batteries together as we drive. Some have a mode solenoid, while newer have a BIM to do this.

What this can do for sorting the weak battery question is that it connects coach and start battery as well as that big old alternator, so that the generator is sure to get plenty of power to start without dragging any battery down low enough to make the furnace funky!

So if the furnace continues to be a problem, maybe try starting the RV engine first, then then crank the generator. If that solves the need to reset the furnace, then you can begin to look closer at possible battery questions. Always keeping in mind that what may seem like a weak battery may actually be corroded/dirty/loose cables.

See if any of that helps and let us know how the guesses turn out?
Morich is offline   Reply With Quote
Old 03-31-2023, 09:00 PM   #5
Winnebago Master
powercat_ras's Avatar
Join Date: May 2015
Location: Manhattan, Kansas USA
Posts: 1,203
The furnace control board will go into a Lockout Mode if the control board can not complete the startup sequence of:

1. Control board applies power to blower motor, sail switch must close and indicate rotation. Then:
2. Control board applies power to propane valve
3. Control board generates repeating sparks for a few seconds.
4. Control board senses heat from the probe that is also the spark ignitor.

I believe it will try 1-4 three times with a short delay (30-60 seconds) between tries, if the third try fails it will go into lockout. The lockout is at least an hour before it tries again.

Power cycling 12 VDC by pulling fuse resets the control board and clears the lockout.

There are many good furnace troubleshooting youtube videos out there, good luck.
Randy - Manhattan, Kansas
2015 Vista 27N
2020 Ford Escape Hybrid
powercat_ras is offline   Reply With Quote

ace, furnace

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
2000 Adventurer Coleman Mach Heat Pump/Basement air AND LP furnace issues, EMS issues Bubbie Heating, Cooling and Appliances 20 07-14-2021 03:22 PM
Mid trip furnace issues, how to troubleshoot? Fasttimes Heating, Cooling and Appliances 8 02-22-2021 09:54 AM
Suburban Furnace lighting issues Davelb Heating, Cooling and Appliances 3 02-18-2021 06:26 PM
Issues, issues, issues...... SaltLife Winnebago Class A Motorhomes 16 03-01-2020 09:29 PM
Furnace Issues Chiefbvfd General Maintenance and Repair 9 05-20-2014 07:17 AM

» Featured Campgrounds

Reviews provided by


This website is not affiliated with or endorsed by Winnebago Industries or any of its affiliates. This is an independent, unofficial site.

All times are GMT -6. The time now is 10:23 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2023, vBulletin Solutions, Inc.