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Old 01-28-2017, 11:51 AM   #1
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It's 29 F outside and my Furnace quit. HELP!

I have a 2015 Sierra 346RETS. The furnace will kick on, but only blows cool air for about 1 minute and then cuts off. I can't even hear it trying to ignite when it is turned on.

Things I've done so far;

Checked that both propane takes are full and turned on.
Hot water heater works.
Stove works.
Pulled the fuse for the furnace and ran the stove for awhile to clear the lines and then tried to start furnace again.


Any ideas?
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Old 01-28-2017, 11:53 AM   #2
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Did it ever work or is this the first time you are trying to use it?
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Old 01-28-2017, 11:58 AM   #3
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Did it ever work or is this the first time you are trying to use it?

We are FT since June. It has worked flawlessly so far this winter until last night.
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Old 01-28-2017, 12:06 PM   #4
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Ok, well if it worked previously that pretty much rules out a stuck sail switch. The furnace has to sense a certain blower speed before it will open the gas valve and the sail switch is the prove out.

While it could have just got stuck the chances are slim.

Having reset by pulling the fuse and knowing you have voltage (blower runs) it is likely a control board.
Some shops can test them.
The only other thing you can check is how much voltage.
The control board wont let the furnace light if the voltage is too low.
This too is a slim chance but we are grasping at straws trying to suggest things.
If you have a multimeter and can check voltage at the furnace, that is about all i can suggest.
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Old 01-28-2017, 01:07 PM   #5
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I agree that you need

To determine where the power is, and where it stops. If you don't know how to use a multimeter it is time to take it in to have it looked at or have someone come out. January and February are no times for a bad furnace. I hope you have good electric units until help arrives!
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Old 01-28-2017, 01:33 PM   #6
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Recheck the propane valves. Try lighting your stove. The safety valve may have tripped on the tank. Just use one and set your regulator to the open tank. Only Crack open the valve maybe half a turn. Try this to see if it will go.
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Old 01-28-2017, 01:39 PM   #7
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Recheck the propane valves. Try lighting your stove. The safety valve may have tripped on the tank. Just use one and set your regulator to the open tank. Only Crack open the valve maybe half a turn. Try this to see if it will go.
The OP said in the first post the stove and water heater work normally.
Can't be the safety valve in the tank.
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Old 01-28-2017, 01:44 PM   #8
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Circuit board.....mine did the same exact same thing.....was working perfect, then nothing.....replaced circut board with a Dinosaur brand and all's well....
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Old 01-28-2017, 02:11 PM   #9
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Hope there's a Walmart nearby, electric ceramic heaters are a great back up. Nice to have fire place now.
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Old 01-28-2017, 02:39 PM   #10
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Did you check your batteries, furnaces will not work with low battery
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