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Old 10-27-2019, 01:01 PM   #1
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Furnace wonít ignite

We ran out of propane in the middle of the night and replaced the tanks in the morning. Ever since, the blower will come on but the furnace will not ignite!! We have purged the lines, changed tanks, opened both tanks and had the burners running while trying the furnace. The 12V battery says itís fully charged and we have taken out the fuse and replaced it
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Old 10-27-2019, 01:24 PM   #2
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Not sure what kind of unit you have but we had a similar problem with our new 2019 Cruiser Aire. Woke up in the morning and the blower would come on but furnace wouldn't light. Had lots of propane. Ended up being a switch in the furnace unit that needed replacing. Was on warranty so didn't cost me but they had it in the shop about an hour and had to remove the furnace from the trailer to change it out. Google reviews indicate that the switch failure has been a problem with Crossroads units.
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Old 10-27-2019, 01:41 PM   #3
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We have a 2019 Sunset trail grand reserve! This could be the problem as we seem to have tried everything else?! Thanks
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Old 11-21-2019, 07:16 AM   #4
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Furnace won't ignite

Hi,

this has happened to me when the propane has run out. I have had to cycle the furnace on and off a few times and eventually it will come back on. From what I have read it's a safety thing. I actually posed this question to the form a few years back and received some very helpful answers.

Not sure if this is the same in your case but I had checked everything on the furnace, nothing seemed broken. After trying the suggestions I received, it worked.
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Old 11-21-2019, 08:54 AM   #5
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what worked for us when this happened was totally disconnecting power - battery and land line - something rebooted and it has worked fine ever since. Think I read this as a solution on a couple of other posts as well.
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Old 11-21-2019, 10:47 AM   #6
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Usually if you run out of gas the furnace will try to relight 3 times then go to a lockout mode. You will need to remove all power - 110 and 12 volt and wait about 4 -5-minuets for it to reset. Then restore power and purge the gas line by turning on the stove for 5 -6 minuets then try to light the furnace. One thing to help avoid running out of gas is to turn on both gas bottles and the change over valve will turn from the empty to the full bottle. Just remember to check it every day while using the furnace and when it shows RED get the bottle filled.

The length of time to burn the stove to purge depends on how close the stove is to the furnace. The closer the shorter time you need to burn the burner.
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Old 11-21-2019, 08:31 PM   #7
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Remember that you can't have any gas valves on when installing those propane tanks with the new required safety valve.
If the gas is on in the RV when the tank is turned on then it thinks there is a leak and shuts off the propane.
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Old 01-13-2020, 11:02 PM   #8
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Quote:
Originally Posted by Jfelswick View Post
We ran out of propane in the middle of the night and replaced the tanks in the morning. Ever since, the blower will come on but the furnace will not ignite!! We have purged the lines, changed tanks, opened both tanks and had the burners running while trying the furnace. The 12V battery says itís fully charged and we have taken out the fuse and replaced it
Did you get your furnace problem fixed and if so, what was it? My furnace has developed the same problem that I had last year at this time. I donít know if itís the switch again but same symptoms. I will definitely be trying some of the suggestions, I.e. cutting all power, etc. before I have to call a repair man. Thanks. Doug
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Old 01-31-2020, 08:22 AM   #9
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I had a similar experience. I turned the furnace off at the thermostat and then turned it back on. Everything worked as it should after that.

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