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Old 10-29-2005, 07:29 AM   #1
bigbob7777
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LP Excess flow device

I just refilled one propane tank on my fiver for the first time. When reading the owners manual, it mentioned an excess flow device that may be activated if you don't go through the reconnection procedure correctly.

My gas on my furnace now seems to turn on for about 5 seconds, then shuts off. The blower stays on, but the gas seems to recycle more often than I remember.

The instructions state that if this unit is tripped, insufficient flow will then occur and the unit will not operate.

My question is: does the furnace gas usually cycle on/off every 5-6 seconds? If I tripped this device, how do you reset it?

Any other ideas?

Thanks bob
 
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Old 10-29-2005, 06:39 PM   #2
Charlie
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First thing I would do is make sure the propane is on and then light the stove. If it stays lit you might have a problem with the furnace, otherwise look for a problem with the regulator at the tanks or the switching valve, I had to replace mine as it failed.
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Old 10-29-2005, 10:13 PM   #3
RVWheels
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bigbob7777,
The device is inside the tank as I understand it. And it is automatic. Nothing for you to reset. It is a safety device designed to shut of gas flow in case the valve on the tank is broken.

In regards to the furnace now running funny...... probably got air in the line. Try burning your stove top burners until you know they are burning properly. This will help get any air out of the line and the furnace should start working normally.

If not then either you're not getting propane to the furnace or the control board may have gone bad.

Good luck.

RVWheels
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Old 11-07-2005, 03:39 PM   #4
sreigle
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I think what triggers that excess flow valve sometime is opening the valve too quickly. I'm not sure how to reset it but think I'd ask someone at a propane store, one of those stores that specialize in delivering propane and selling the various parts. It may be as simple as turning the tank upside down for a period of time (don't know, that's just an example).
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Old 11-07-2005, 04:21 PM   #5
OntMont
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This problem is more likely to occur if the tank on the far side from the regulator is opened too quickly, because the entire cross over pipe has to be filled to tank pressure. Try using the other tank if that is the case. You should be able to reset the excess flow valve by closing the tank valve and disconnecting it. Then re-connect and re-open very slowly.

The furnace takes more gas than the stove, so the stove may work, while the furnace won't.
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Old 11-07-2005, 04:51 PM   #6
Mels Musty Music
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If nothing else has worked so far check to make sure the gas line didn't get pinched when you replaced the tank. Might check the other side too if this is the first time its been used. Furnace needs higher pressure than the stove and hot water heater and a kink can reduce the pressure enough to keep the furnace from firing up properly. I learned the hard way.
Good luck.
Hank
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Old 11-08-2005, 04:01 AM   #7
DHenry
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To answer your question, No your furnace is not supposed to cycle every 5-6 seconds. It is either not getting the fuel to burn or has a problem. Hope you are able to fix the problem without taking the Montana in for a service call. Let us know how it turns out.
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