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Old 12-05-2006, 12:15 PM   #1
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1986 34.5' Airstream 345
Speedway , Indiana
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LP smell at rear furnace

Streamers,
In our 1986 345 MH I am getting a slight whif of LP each time the rear furnace starts up. This is at the begining of each heat cycle. The furnace works great in every other way. I have not been able to dig into the location yet to look.
Anyone have any ideas?
Thanks, Rob
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Old 12-05-2006, 06:51 PM   #2
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1966 24' Tradewind
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Ahhh...

AHHH, YEAH; Get outta there and turn off the gas from outside! Then wait 20 minutes or more and open the coach door if you did not close it fleeing. If you don't smell the gas open the windows and vents. If you still smell the gas do not turn anything on electrical. Just a small spark inside a switch will....boom! The gas is heavy and will conscentrate near the floor first. Have a person knowledgeable find that leak for you. The way to locate it is to spray soapy water on all the gas connections and watch for bubbles. However, the gas has to be on and in a closed place like a closet you have to have PLENTY of ventilation.

Be Carefull, please.
Neil.
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Old 12-05-2006, 07:09 PM   #3
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Yes gas is explosive but if you have lived through several burner cycles I don't think panic is warranted just yet.

If you only smell gas at the beginning of the cycle I would assume the burner may have a hole in the fire box or the seal on the fan shaft, between the fire box and the blower has failed. If this is the case soap will not detect the problem and you will have to remove the furnace and open it up for inspection. Before removing the furnace for inspection I would call the maker and ask for areas to check
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Old 12-05-2006, 07:19 PM   #4
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The burner part of the furnace should not be venting into your RV. I agree with HowieE that you have a leak from the fire box. The same leak can also cause CO to enter your RV while the heater is in operation. You need to have an operating CO detector to be safe.
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Old 12-05-2006, 08:25 PM   #5
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Rob,
I don't know if your firebox is leaking although that certainly sounds plausible, I do know that CO is an orderless, lethal gas.

A distressing number of people die of CO poisoning each year because of heater malfunctions (and indoor fires).

You need to be very careful.

We have a CO detector in our MH bedroom. It sometimes goes off if the generator is running and the Fantastic vent is blowing out (thereby sucking exhaust into the MH).
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Old 12-06-2006, 06:44 PM   #6
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1986 34.5' Airstream 345
Speedway , Indiana
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Thanks everyone.
I have shut off the gas outside, and ventilated the coach. I hope to start looking at what the problem is next week, and I will keep you posted.
Rob
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