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Old 04-27-2015, 11:00 AM   #1
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Berkshire cab heater odor.

2011 Berkshire 410QS. We needed to use the cab heater the other day but after it ran for a while noticed that there was an odor coming from the cab heat vents. To me it was a semi sweet smell. My husband thought it was nail polish remover. We checked for leaks in the front by generator. Did not find any signs of leaks. Ideas of what it could be? Thank you!!


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Old 04-27-2015, 11:08 AM   #2
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Just a shot in the dark, but last year when I killed a bunch of hornets that got into our attic at home, there was a kind of sweet, but sickening odor from them. Is it possible you had a hornets nest built somewhere on the coach ?
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Old 04-27-2015, 11:40 AM   #3
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Maria, I don't know much about RV heaters, but on my cars that sweet smell was antifreeze. Typically from the heater core.

Not from a RV, but this is what a heater core looks like:

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Old 04-27-2015, 12:16 PM   #4
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2 if it is sweet smell it can't be good. it could be bad news like a head gasket or heater core. need to have cooling system pressure tested.
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Old 04-27-2015, 12:35 PM   #5
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Thanks. Hope it's not any of the above. Will let you know.


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Old 04-27-2015, 01:03 PM   #6
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The head gasket is 40' behind them so I don't think that is it. I think Dan is correct in the heater core. I read a couple of people on the forum having the same issue. Any wet spots in the ground? It doesn't take much of a leak for the smell to get out.
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Old 04-27-2015, 01:15 PM   #7
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If this is an in dash heater core, peel up the carpet a little bit.

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Old 04-27-2015, 01:28 PM   #8
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No carpet in a 2011.
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Old 04-27-2015, 02:58 PM   #9
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Does anyone know where the heater core is located in the 2011 Berkshire ?


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Old 04-27-2015, 03:47 PM   #10
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marialee, it should be towards the front end of your coach. It will have two hoses hooked to it that run from the engine. You should be able to follow those two lines right to the core.
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