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Urgent help, heater failed

KE6IRJ
Explorer
Explorer
Hey all, we are using our trailer for Thanksgiving weekend and when we set up, the heater runs for a few seconds and stops.

We have full hookups so we have electric heaters keeping us warm, but any ideas? It's 20 degrees tonight, so I would prefer the main heater.
Brian
2010 Keystone Springdale SG294BHSSR
2006 Ford F250 Superduty SB 4x4
27 REPLIES 27

DutchmenSport
Explorer
Explorer
westend wrote:
DutchmenSport wrote:
...
...I'm up here in MN and have NEVER seen a meter freeze up. I have seen water in propane supply piping freeze, it is rare...


The one time I dealt with a frozen meter was in Cicero, Indiana, (several years ago) the church we were attending at that time. Outside temps were about 10 below (F) and it as a Sunday night for evening service. The meter was frozen up. When we showed up for service, they guys of the church had built a makeshift tent around the meter, and were taking turns with hair blowers and electric heaters trying to get the gas to flow.

Another church we were associated with in Ohio, (that was another life-time ago too), had a rental property. An elderly woman lived in the house and temps were quit cold that night also. The call went out to all the guys in the church that could help help, so I went. The meter and/or lines were frozen, and here again folks were trying rather unique ways to get it unfrozen. I wasn't much help, more in the way than anything (I was much younger then), but at least some of the ladies of the church brought out some hot chocolate and coffee, so over all, in spite of freezing our keesters off, we had a pretty good time! I remember lots of laughing more than blistery cold!

A few years ago, I had problems one winter with my own camper. I had 2 full propane tanks, and wanted to fire up the furnace in the camper. Temps WERE 20 below zero (F) and I could not get the furnace to fire. I figured the regulator froze up. I think it was several months later, when filling up one of my tanks, I was chit-chatting with the old-timer that filled my bottle. He said, probably, the temperatures were so cold, the propane tank simply lost it's pressure. In other words, the opposite of what one would expect if the the tanks got hotter and hotter and hotter, expanding the gas to the point of explosion. In this case, the gas might have contracted enough, it simply did not have any pressure. I had a hard time swallowing that one. But then he did say, the regulator could have frozen up.

We were at the KOA in Jeffersonville, Indiana (North of Louisville, KY) and they had a number of permanent campers, with the 100 pound propane tanks, some had 2 - 100 pounders. I talked to the owner of the campground and she said it was quite common for the winter residents to have their propane lines frozen. In the winter, they take extra precaution ... AFTER they've experienced a frozen line or regulator. She said, they receive phone calls in the middle of the night asking for help, which they always attempt to do.

You may be right on one thing though. It might be water in the lines that's causing the freeze, or water in the regulator that causing the freeze. That would explain it. But still, it does happen.

westend
Explorer
Explorer
DutchmenSport wrote:
Here's another thought? Are you in temperatures below freezing right now? If so, it's possible your propane gas line could have frozen up, perhaps at the regulator. And for anyone who says gas lines don't freeze have never live in Indiana where it happens quite often at people's homes and in RV's. Almost always, the gas meter at home gets frozen. On RV's it's often the regulator.

I'm just saying. .... check it out and make sure you have gas flow. Turn on your gas stove and make sure you have a good flame. If so ... I'll then get off my soap box.
You often see meters frozen and regulators frozen in Indiana? I'm up here in MN and have NEVER seen a meter freeze up. I have seen water in propane supply piping freeze, it is rare. I've used a 20 lb. propane cylinder on the outside of my fish house for 40 years and have not once had a frozen regulator.

Nothing wrong with checking for adequate gas flow by using the stove top burners. Leaving a couple "on" while firing the furnace can sometimes visually show a failing regulator.

The OP does state that the furnace "runs for a few seconds". Whether that means a flame is present hasn't been stated.
'03 F-250 4x4 CC
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Huntindog
Explorer
Explorer
I did the dinosaur board the first time my heater failed on advice I got here on the forum. That did not fix it. The dinosaur board is kinda cool, in that it. has a diagnostic function. That function indicated that their was a fault with the sail switch. A new sail switch fixed it. IMO they just don't last very long.

The Dino board is about 100.00. The sail switch can be had on ebay for 7.00. I now carry a spare.

For the op, I recommend replacing the sail switch first.

Don't bother trying to test it, as my first one tested fine with a meter, but was bad, and only working intermmitadly.

Getting to the switch on a Suburban is a pain. Gotta pull the entire heater out.
Practice makes perfect, I am pretty good/fast at it now.

A tip: Once you have it out, cut and splice some extra wire into the wire loom. Then you can do some testing with the unit not installed.

Huntindog
100% boondocking
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Y-Guy
Moderator
Moderator
wa8yxm wrote:
However I do not like 1500 watt heaters on RV type outelts save for the washer/dryer outlet if so equipped.. Figure out a 12 gauge way to power them (I installed additional outlets that are of higher quality).


wa8yxm makes a good point! However, at a minimum kill the power and pull the outlet out of the wall to check to see if they used the screw terminals or the push-in type AKA back stab. If they used the back stab see if you can rewire to use the screw terminals. It's a better, solid connection. The stabs are only held in with a small spring - I don't recommend those for powering anything like a space heater. I did this to each of the outlets in my RV, didn't take long and I feel safer.

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2007 Winnebago Sightseer 35J

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DutchmenSport
Explorer
Explorer
Here's another thought? Are you in temperatures below freezing right now? If so, it's possible your propane gas line could have frozen up, perhaps at the regulator. And for anyone who says gas lines don't freeze have never live in Indiana where it happens quite often at people's homes and in RV's. Almost always, the gas meter at home gets frozen. On RV's it's often the regulator.

I'm just saying. .... check it out and make sure you have gas flow. Turn on your gas stove and make sure you have a good flame. If so ... I'll then get off my soap box.

enblethen
Nomad
Nomad
Do not use WD-40! It leaves an oily film.
You can use something like brake clean to remove debris.

Bud
USAF Retired
Pace Arrow


2003 Chev Ice Road Tracker

RoyB
Explorer II
Explorer II
enblethen wrote:
I would do a good blow out with a can of air. Aim toward the sail switch area as I suspect a small fleck of dirt blocking it's operation.
Leave the WD-40 away from the furnace.


Probably a good idea. I always have a can of WD-40 and a roll of duct tape in the door side pocket...

You know how the engineering flow chart goes...

google image

Haven't had any flareups yet...

Roy Ken
My Posts are IMHO based on my experiences - Words in CAPS does not mean I am shouting
Roy - Carolyn
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D_E_Bishop
Explorer
Explorer
There are a couple things in your two posts that make me think your board is bad. They are interconnected. First you said runs a few minutes then off, second, no click when you turn it on.

It is true that a failure of the sail switch can cause the first but the no click is the board.

You did not say anything about the heater trying more than once when you turn it on. Usually the heater will try three or four times and then shut down completely. The board also turn on the propane, do you smell any propane?

You are on shore power so low DC voltage shouldn't be a problem but you should check that before going any further.

Just stuff I learned here on the Forums.
"I travel not to go anywhere, but to go. I travel for travel's sake. The great affair is to go". R. L. Stevenson

David Bishop
2002 Winnebago Adventurer 32V
2009 GMC Canyon
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SoundGuy
Explorer
Explorer
KE6IRJ wrote:
Never used the furnace.


Would have been helpful if you'd mentioned this "small detail" in your original post. :R

So since you have a 2010 model yr trailer would we correctly assume this was a used purchase for you, which in turn could mean the furnace never even worked at the time you purchased it? :h
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KE6IRJ
Explorer
Explorer
Thanks all. And yes my fresh was empty because we knew it would be cold and had water hookups.

Anyway, we will troubleshoot when we get home.
Brian
2010 Keystone Springdale SG294BHSSR
2006 Ford F250 Superduty SB 4x4

Old-Biscuit
Explorer III
Explorer III
Furnace lights off...runs for few minutes and then shuts down


Flame proving circuit
Main flame after lighting off has to 'prove' that it lit and is staying lit.
THat is done using the spark electrode

If spark electrode is dirty (soot.carbon) signal will not go to circuit board
If spark electrode is not in correct position...same
If spark electrode gap is too wide/too narrow (1/8") ....same
If ceramic is cracked on spark electrode.same
If high tension wire to/from spark electrode isnt making good/tight connection...same
If circuit board connectors are not making good/tight contact....same

If main flame lights off.then goes out.......Flame Proving circuit
Is it time for your medication or mine?


2007 DODGE 3500 QC SRW 5.9L CTD In-Bed 'quiet gen'
2007 HitchHiker II 32.5 UKTG 2000W Xantex Inverter
US NAVY------USS Decatur DDG31

enblethen
Nomad
Nomad
I would do a good blow out with a can of air. Aim toward the sail switch area as I suspect a small fleck of dirt blocking it's operation.
Leave the WD-40 away from the furnace.

Bud
USAF Retired
Pace Arrow


2003 Chev Ice Road Tracker

WILDEBILL308
Explorer II
Explorer II
I don't know if your thermostat has one but turn the settings to off. pull the front of the thermostat off next find and remove the fuse,check the fuse, wait one minute and reinstall the fuse. Now try the thermostat. Make shure all the settings on the thermostat are set for gas heat.
Bill
2008 Newmar Mountain Aire
450 HP CUMMINS ISM
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MrWizard
Moderator
Moderator
You went camping, with an empty fresh water tank?
Expecting to use campground water!

Just to save a few pounds you're weight?

Always travel with at least 1/2 tank
That fresh water has saved more than one radiator and engine when traveling, and a real convenience if stuck or stranded because of bad weather, road accidents etc..

You have the cat heater and the electric heat,
You can trouble shoot the furnace at home
Don't forget to check your battery voltage
A bad wire connection , low voltage, and the heater won't work correctly
I can explain it to you.
But I Can Not understand it for you !

....

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