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07-18-2021, 02:24 PM
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#1
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Member
Join Date: Apr 2020
Location: Winterhaven
Posts: 92
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Rooftop A/C leaking refrigerant
Hello, got a bit of a head scratcher for y'all. I just went up to the roof today to blow it off and I noticed dried pink residue trails from both my front and rear air conditioners which tells me they are leaking refrigerant. The frustrating thing is that both ACs are still blowing cold air and the leak is infrequent enough that it has time to dry.
Does anyone know what would cause an intermittent leak on two relatively new ACs? (FYI the trailer is a 2020 model year, the rear AC is a 30,000 BTU dometic, and the front AC is a 15,000 BTU dometic). The only cause I could think of is they are overheating due to high heat (105+ deg Fahrenheit days) and running constantly (just during the day) and the high pressure is forcing coolant out somewhere.
Thoughts and recommendations would be appreciated.
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Peter Clark
2020 Jayco Eagle 355MBQS
2017 Ram 3500 6.7L Cummins
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07-18-2021, 02:32 PM
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#2
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Senior Member
Join Date: Nov 2011
Location: Where ever the boss says we're going.
Posts: 16,109
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That's from the condensate water probably. If it was from the refrigerant it would be oily.
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 DISNEY LOVERS
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07-18-2021, 02:44 PM
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#3
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Senior Member
Join Date: Oct 2016
Location: Saint Thomas, PA
Posts: 2,234
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Doesn't sound like refrigerant to me. Algae, soap, wax?
Earl
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2017 Eagle 293RKDS, factory ordered, lots of mods and upgrades. More than I can list.
2018 Ram 3500 crew cab long bed SRW diesel 6spd Aisin 4wd Tradesman.
B&W Ram puck 5th wheel
Line-X premium
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07-18-2021, 02:54 PM
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#4
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Site Team
Join Date: Apr 2012
Location: Newark, NY
Posts: 15,934
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Your Freon would evaporate as soon as it hit the outside air, except the compressor oil like Grumpy mentions. There shouldn't be anything pink in the ACs.
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Think you're too old to cry or swear out loud...walk into your hitch in the dark.
2012 Jay Flight 19RD
2016 Ford F150 XLT 2X4 SC 3.5L Eco Max Tow
2010 Tundra TRD DBL Cab (Traded)
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07-18-2021, 04:10 PM
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#5
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Member
Join Date: Apr 2020
Location: Winterhaven
Posts: 92
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Quote:
Originally Posted by JFlightRisk
Your Freon would evaporate as soon as it hit the outside air, except the compressor oil like Grumpy mentions. There shouldn't be anything pink in the ACs.
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I read online that R-401a refrigerant is pink, hence my concern, but from the other comments it sounds like I might be okay.
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Peter Clark
2020 Jayco Eagle 355MBQS
2017 Ram 3500 6.7L Cummins
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07-18-2021, 04:12 PM
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#6
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Member
Join Date: Apr 2020
Location: Winterhaven
Posts: 92
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Quote:
Originally Posted by Grumpy
That's from the condensate water probably. If it was from the refrigerant it would be oily.
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It's hard to tell because it was dry. I guess if it was oily it wouldn't be dry.
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Peter Clark
2020 Jayco Eagle 355MBQS
2017 Ram 3500 6.7L Cummins
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07-18-2021, 05:33 PM
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#7
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Senior Member
Join Date: Oct 2016
Location: Saint Thomas, PA
Posts: 2,234
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Quote:
Originally Posted by Cujonaut
I read online that R-401a refrigerant is pink, hence my concern, but from the other comments it sounds like I might be okay.
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The cylinder color is pink/rose not the refrigerant. Refrigerant cylinders are different colors to identify the type.
Earl
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07-19-2021, 06:36 AM
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#8
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Senior Member
Join Date: Feb 2011
Location: Gilmer, Texas
Posts: 1,053
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Quote:
Originally Posted by Cujonaut
I read online that R-401a refrigerant is pink, hence my concern, but from the other comments it sounds like I might be okay.
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R410a comes in a pink jug. It is clear/transparent . Unless someone has added access ports then added leak detection dye to both units that pink stuff isn't refrigerant.
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S.A.Young
2011 321RLTS
2012 Chevy duramax dually
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07-19-2021, 08:04 PM
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#9
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Junior Member
Join Date: Jul 2021
Location: DRUMMONDS
Posts: 2
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The pink is from pink slime mold in the unit's internal condensate pan. It is common in commercial coolers and ice machines.. Should be harmless, but if the mold accumulates around the drain port, condensate water could back up and leak inside. There are drain treatment tablets available that prevent mold and algae growth.
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07-19-2021, 11:29 PM
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#10
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Member
Join Date: Apr 2020
Location: Winterhaven
Posts: 92
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Quote:
Originally Posted by JeremyL
The pink is from pink slime mold in the unit's internal condensate pan. It is common in commercial coolers and ice machines.. Should be harmless, but if the mold accumulates around the drain port, condensate water could back up and leak inside. There are drain treatment tablets available that prevent mold and algae growth.
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Thanks for the advice. I'll pull the cover this weekend and see if I see any slime/mole accumulation.
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Peter Clark
2020 Jayco Eagle 355MBQS
2017 Ram 3500 6.7L Cummins
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