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Old 03-30-2017, 11:35 AM   #1
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Atwood furnace smells gas

Anybody have any advice on Atwood furnace series 8525 model I smell gas around the vent. I'm thinking it may be the gas valve not sure.
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Old 03-30-2017, 02:24 PM   #2
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2 places to check

LP gas line connections to furnace
Gas valve to burner

Although LP line pressure is only roughly 0.4 psi (11" WC) gas valves can leak thru
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Old 03-31-2017, 03:12 PM   #3
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Ours is not an atwood, but we had the same issue. The gas valve on ours has a diaphragm that has a very small hole in the housing. It seems that once the diaphragm fails, gas leeks out of the small hole. It drove me nuts until we used a propane sniffer and finally found it. Had to replace the regulator. Chuck
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Old 03-31-2017, 03:51 PM   #4
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Originally Posted by chuckbear View Post
Ours is not an atwood, but we had the same issue. The gas valve on ours has a diaphragm that has a very small hole in the housing. It seems that once the diaphragm fails, gas leeks out of the small hole. It drove me nuts until we used a propane sniffer and finally found it. Had to replace the regulator. Chuck

Sounds like you had a LP Regulator leak from 1st stage vent VS a leaking GAS Valve on the furnace like OPs issue
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Old 03-31-2017, 05:44 PM   #5
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Sounds like you had a LP Regulator leak from 1st stage vent VS a leaking GAS Valve on the furnace like OPs issue
That's correct, but the water heater sits right under the furnace and we thought at first it was the furnace. It's best to get someone with a propane sniffer to check things out. I would have pulled the furnace apart looking for it since nothing showed up as leaks in the water heater lines using a soap test. Chuck
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Old 03-31-2017, 11:43 PM   #6
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That's correct, but the water heater sits right under the furnace and we thought at first it was the furnace. It's best to get someone with a propane sniffer to check things out. I would have pulled the furnace apart looking for it since nothing showed up as leaks in the water heater lines using a soap test. Chuck
Sound advice using a propane sniffer

Not making the connection between LP Regulator leak vs furnace or water heater....neither of which have a regulator

LP Regulator is right at propane tank
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Old 04-01-2017, 07:17 AM   #7
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Old Biscuit. Maybe I'm not using the right terminology but I don't know what else to call it. It is some type of electric valve on the water heater gas line that turns the flame on and off for the water heater. So a regulator? Chuck
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Old 04-01-2017, 11:10 AM   #8
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Old Biscuit. Maybe I'm not using the right terminology but I don't know what else to call it. It is some type of electric valve on the water heater gas line that turns the flame on and off for the water heater. So a regulator? Chuck
That would be the solenoid operated gas valve
Water heater, furnace, fridge use them

LP Regulator.....
That is the propane system regulator at tank that controls the system pressure

A Gas Valve is CLOSED or OPEN-----stops/allows flow
A Regulator modulates between Closed and Open----controls pressure in system based in downstream flow demands


Atwood furnace gas valve


Suburban Water Heater Gas Valve



LP Regulator for MHs
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Old 04-05-2017, 06:13 PM   #9
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Hey thanks everyone
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