Puddle on floor May 29, 2019, 07:20:55 pm Hi, last night notice small amount of water on floor by bathroom door. On closer look noted from under cabinet where water pump is located. We have 2017 MB. Does not appear pump leaked but floor was damp and wooden 2x2 damp. I did fill the on board water tank before leaving and thinking maybe overfilled😫😫. All dry now, I emptied water from tank. Any suggestions?? Thanks
Re: Puddle on floor Reply #1 – May 29, 2019, 08:07:22 pm First step is to determine where the water is coming from. If it’s hard to tell, you can dry things out and place dry paper towels in suspect areas. They can make it easier to pinpoint leaks. There is so much water stuff in that area, pump, pipes, sink, and so on. Let us know what you find!Rich‘03 MB in NC. 1 Likes
Re: Puddle on floor Reply #2 – May 29, 2019, 08:12:17 pm QuoteI did fill the on board water tank before leaving and thinking maybe overfilled. I emptied water from tank.Filling the water tank to 100% wouldn't cause a leak inside the LD. Secondly, I don't know what "wooden 2x2 damp" means. In that area, water could come from the toilet, the water heater, loose BR or shower faucet water line connections, backed up BR sink plumbing, open vent or a spill. I agree with Ric's suggestion to place paper towels in the area to try to trace the source of the water. Put paper towels around the toilet area, under the BR sink, around the water pump, next to the drawers in the hallway. Pull out the bottom drawer of the closet and put paper towels in and around the water heater. Now turn on the BR faucet, kitchen faucet, shower, and flush the toilet. Search for wet spots.In addition, I'd turn on the water pump and disconnect from city water. After the water pump has pressurized the water lines, listen if the pump comes back on when no one is using water. If the water pump remains off (quiet) for at least 15-30 minutes, then the leak is probably not from the fresh water pumping. If the pump comes on, start searching the paper towels for wet. If you leave the RV, make sure the water pump and/or city water are turned off.Hope this helps. 1 Likes
Re: Puddle on floor Reply #3 – May 29, 2019, 08:42:36 pm Hi Molly. If the puddle of water was in the hallway outside the bathroom, I think it could have come through the roof. I know in older MB's, that came with a swamp cooler, that this device or the adjacent A/C unit could be leaking. 2017 is too new to have a swamp cooler, but does still have a vent? As stated you shouldn't have a water leak no matter how full your tank was. It would have leaked out of the vent line, the small hole next to the filler port. That said, the filler hose or vent line could leak, but near the tank, not on the floor. RonB 2 Likes
Re: Puddle on floor Reply #5 – May 30, 2019, 01:54:52 am One more tip, I typically dry off all the pipes, etc. Then go back and feel them every now and then to see if they are wet. Sometimes you can find that wet spot on the pipe before the paper towels show water, so I would do both.Jane 1 Likes
Re: Puddle on floor Reply #6 – May 30, 2019, 08:19:04 am We have a 2017 MB and we get a occasional drip (sometimes more) from air conditioner when it is very humid outside. We are presently in Galveston near the beach and this is happening. I have insulated between the return air and air cooled air and this has helped, but not eliminated the issue. According to various A/C guys, it is cause by the way the unit was designed and you have to live with it. We put a small towel down and forget about it.
Re: Puddle on floor Reply #7 – May 30, 2019, 11:32:16 am Quote from: Ross and Beverly Taylor - May 30, 2019, 08:19:04 amWe have a 2017 MB and we get a occasional drip (sometimes more) from air conditioner when it is very humid outside. We are presently in Galveston near the beach and this is happening. I have insulated between the return air and air cooled air and this has helped, but not eliminated the issue. According to various A/C guys, it is cause by the way the unit was designed and you have to live with it. We put a small towel down and forget about it.Inside the A/C unit, on the cooling or evaporative side, there are drains to remove the condensate, The drains can plug, causing overflow into the interior. It takes a knowledgable tech to disassemble and clean the drains. I suggest finding another RV A/C tech, the A/C was not built to operate that way, this isn't a common problem.Larry 1 Likes
Re: Puddle on floor Reply #8 – May 31, 2019, 12:02:55 pm I also believe that this should not be happening. We did contact an RV tech to look at the air conditioner and we contacted Dometic too. They all said this is not unusual in an extremely warm and high humid area (Texas coast near ocean). One thing they recommended, beside insulating the cold air side of the plate, that helped was to run the fan continuously on high. The condensation occurs on the plate (return air side) between the return air and cold air. I don't remember seeing a drain in this area. (is there one that we missed?) I am familiar with drain near the coils on the rooftop and it is functioning properly.
Re: Puddle on floor Reply #9 – May 31, 2019, 01:31:45 pm Quote from: Ross and Beverly Taylor - May 31, 2019, 12:02:55 pm. One thing they recommended, beside insulating the cold air side of the plate, that helped was to run the fan continuously on high. The condensation occurs on the plate (return air side) between the return air and cold air. I don't remember seeing a drain in this area. (is there one that we missed?) I am familiar with drain near the coils on the rooftop and it is functioning properly.The condensation occurs on the evaporator (cooling) coils and drips off and is contained and drained to the roof .The drains can be blocked by a build up dust, dirt and, in worse cases, algae. The evaporator coils are in a sealed, insulated box, I'm not sure where additional insulation can be added.The coils (condenser) on the roof get very hot and do not produce condensation. The drains in the roof pan are for rain water and whatever condensate is released from the evaporator.In a couple of cases, the bolts holding the A/C to the roof have been found loose. The bolts are access by removing the interior plastic cover, there will be three or four bolts that may need tightening, compressing the foam gasket.This isn't a common problem since most of the AC roof gaskets are glued to the roof, eliminating a possible leak entry point.Larry
Re: Puddle on floor Reply #10 – May 31, 2019, 02:55:29 pm Where the A/C repair guy, with Dometic agreement, put the insulating stick on strips was on the cold air columns to insulate the cold air from the return air area. This helped some. The warmer humid air was condensing on top of the metal (may be plastic, I can't remember) plate between the return air and cold air. All the other areas including drain were checked over twice and were operating correctly. Again this has only happen when it is hot and high humidity (80-90%). Sorry if this does not make sense.
Re: Puddle on floor Reply #11 – May 31, 2019, 03:05:57 pm Quote from: Ross and Beverly Taylor - May 31, 2019, 02:55:29 pmWhere the A/C repair guy,, put the insulating stick on strips was on the cold air columns to insulate the cold air from the return air area. This helped some. The warmer humid air was condensing on top of the metal (may be plastic, I can't remember) plate between the return air and cold air. Got it, he used an insulative foam tape with a sticky back, commonly used to wrap A/C lines in commercial applications as well as in home AC systems. It's available at most home centers.https://www.homedepot.com/p/Armacell-2-in-x-30-ft-R-1-Foam-Insulation-Tape-TAP18230/100539553Larry
Re: Puddle on floor Reply #12 – May 31, 2019, 08:00:59 pm Are there two threads here - one about water on the floor, which led to a second one about AC units dripping condensation? Or, has Molly traced the water source of her leak to the AC unit? As Larry said early on, the AC unit should have a drain so that no condensation comes into the coach. Can Ross confirm that there was no drain catching condensation from those risers?Molly, did you find the water source?Ken F in WY
Re: Puddle on floor Reply #13 – June 02, 2019, 09:46:15 am The drip that we were experiencing was not coming from the coils that drain was functioning as designed, but instead was coming from the condensation that formed on top of the metal/plastic piece (return air side) that separates the return air from the cold air coming out of the air conditioner. This only happens in extremely when it is extremely humid and hot (Texas coast). We were in Galveston last week and we had the problem. The last 2 days we have been inland at COE park near Belton, TX with no drip. The drain for the coils has worked as it should in both locations. If one experiences the high humid drip, running the A/C fan on high and insulating the cold air from the return air helps but does not entirely eliminate the problem. Dometic suggested doing the above to me.
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