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Old 06-12-2020, 11:16 PM   #1
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Brand: Thor Motor Coach
Model: ACE 29.3
State: Idaho
Posts: 8
THOR #15686
Question Chemical Smell in Back (Bedroom)

Hi all.

We have our RV out for the first time this year. Got set up and have a strong chemical smell in the back (bedroom) of the RV. Can smell it outside, too, around the back of the rig. The AC is running and pumping out cold air. Not sure that's the problem because the smell is localized in the back. Never happened before. Any ideas?

2016 Thor ACE 29.3

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Old 06-25-2020, 02:36 AM   #2
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Brand: Thor Motor Coach
Model: Chateau 24FS
State: New Mexico
Posts: 114
THOR #12181
Are you sure its chemical smell? If so Did some cleaner fall over and spill somewhere? Could it be an electrical short smell? If it's electrical you need to address the cause immediately!
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Old 06-25-2020, 08:39 PM   #3
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Brand: Thor Motor Coach
Model: 2013 ACE 30.1
State: Alberta
Posts: 1,379
THOR #2631
Well a chemical smell in the bedroom area could be a lot of things. Is POT legal in your state? A neighbor camper perhaps? Smelling it outside as well adds another layer to the problem. Since your coach is a 2016 I assume this is the first time smelling this odiferousness (is that a word?)......after bringing the RV out of hibernation for the 2020 season. So first thought is a dead whatever that has nested somewhere in the coach and its thawing body odor could merge with your nasal passages.

The other thought is; can you determine what appliance needs to be running to generate the smell......you mention the air conditioner only? Do you still get the smell when all appliances are off (A/C, water heater, furnace). In some ACEs there are various types of hoses, ducts and wires that run down the utility side of the coach from city water port at the back to the wet bay location/appliances location. If any hose or duct or wire has sagged they might come in contact with a hot "whatever" to cause a plastic chemical smell........or as previous posters noted wiring overheating, but perhaps from touching a heating source. That assumes that if electric wiring is in an over-current state it "should"
trip a breaker or blow a fuse. Of course the Titanic was unsinkable too.
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Old 06-28-2020, 04:08 PM   #4
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Brand: Thor Motor Coach
State: Missouri
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Any batteries near the back? Converter/Inverter?
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Old 06-28-2020, 08:11 PM   #5
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Model: 25.2 Axis
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Did you get a new mattress.
Are you in Georgia
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Old 06-28-2020, 08:29 PM   #6
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Model: Axis 24.4
State: Michigan
Posts: 9,834
THOR #1150
Is it worse in the bathroom? Check the Air Admittance valve in the bathroom cabinet; it may be loose or may need to be replaced.
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Old 06-29-2020, 05:05 PM   #7
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State: Missouri
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Smell apparently got them
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