Community Forums

SteveUpp · 07-21-2020, 07:22 AM

My NA's black tank sensor has started to malfunction and is reporting erroneous readings. Anyone have any ideas on what steps should be taken to diagnose the problem? I'm not even sure how to access the tanks. My guess is that you can get to them through the passenger storage bay by removing the aft wall that is along the centerline of the coach.

Driveby · 07-21-2020, 08:57 AM

Before you mess around with outside I'd try and make sure the inside is as clean as can be. Old school ice cubes and bumpy road won't work for macerator toilets but there must be a way?

Fill and drain a couple times with water?

StuartS · 07-21-2020, 09:22 AM

EXTREME CLEANER by Happy Campers - Extreme Tank & Sensor Cleaner
Usually buy it on Amazon for about $25.
You can also go the Happy Campers web sight & buy direct. They also have great phone support.

SteveUpp · 07-21-2020, 12:39 PM

Quote:

Originally Posted by Driveby

Before you mess around with outside I'd try and make sure the inside is as clean as can be.

Driveby - yeah, we've given that a shot and rinsed, treated, driven, dumped, rinsed again... Maybe we should try it again, it just acts so goofy, it seems that there is something electrically wrong somewhere.

FlaRider · 07-22-2020, 07:32 AM

Does the New Air use KIB tank sensors? There is an issue on the 2018 and maybe later DSDP KIB system.

SteveR · 07-22-2020, 12:26 PM

On my 2020 New Aire 3543 the tanks are monitored by a Silverleaf module SPX-300 and not the KIB system.

SteveUpp · 07-22-2020, 03:47 PM

Quote:

Originally Posted by SteveR

On my 2020 New Aire 3543 the tanks are monitored by a Silverleaf module SPX-300 and not the KIB system.

Yes. I confirmed this by calling SilverLeaf. It’s either the sensor or the little circuit board that has gone bad. Ordered the parts and I’ll replace the circuit board first then the sensor if necessary.

Learning all the time...

Steve

bluefin · 07-22-2020, 04:02 PM

We had a sensor problem for about a month in our last RV. Just before I was headed to the dealer someone told me about Unique Digest-it holding tank treatment. I put in about a quarter of a bottle and drove about 70 miles to our next stop. Dumped the tank and it worked perfect every since. That is all we use now. And it is septic safe for those of you that have a septic system at home.

Unique Digests-it

oregonhiker · 07-23-2020, 07:11 AM

Quote:

Originally Posted by SteveUpp

My NA's black tank sensor has started to malfunction and is reporting erroneous readings. Anyone have any ideas on what steps should be taken to diagnose the problem? I'm not even sure how to access the tanks. My guess is that you can get to them through the passenger storage bay by removing the aft wall that is along the centerline of the coach.

Hi Steve, When you say the sensor is acting up what is going on? We have a 2017 MA and both the black and grey don't read anything for a while. They then fill what seems somewhat normal till they hit 80% and immediately go to 100%. At the shop right now and they said they can start throwing parts at it of which I don't want to buy parts not needed. Good luck with yours.

SteveUpp · 07-25-2020, 01:22 AM

My symptom is that the black tank sensor after emptying and recalibration on its own begins increasing the tank level so that after about 20 minutes the SilverLeaf console shows that the tank is full. I called SilverLeaf and they said that this is a symptom of a bad tank sensor or a bad sensor circuit board. I ordered both and will first replace the circuit board. They sometimes corrode. If that doesn’t fix it I will replace the sensor. More to come. Right now I unplugged the black tank sensor from the TM 102 and disabled the alarm.

mjh0827 · 07-26-2020, 09:05 AM

While my New Aire was being serviced, asked the Service Writer about the gray tank fault. He had his technician look at the problem and the technician "reset" the control panel which cleared the fault and now the tank is showing an appropriate level.

Not sure about your situation, but, you may want to check the control board for a reset capability to see if that works. If it does, it would be a lot easier than replacing the board.

Mike

cinergi · 07-26-2020, 10:09 PM

I had the same issue and it ended up being a corroded circuit board (the little board that connects the sensor and the telephone cable that goes to the 102). It was corroded due to sitting in leaking gray water on top of the tank which is where the circuit board rested. I hope you can get at it from the passenger side. I got to it by tearing down my wet bay which was a chore.

SteveUpp · 07-27-2020, 05:51 AM

Quote:

Originally Posted by cinergi

I had the same issue and it ended up being a corroded circuit board (the little board that connects the sensor and the telephone cable that goes to the 102). It was corroded due to sitting in leaking gray water on top of the tank which is where the circuit board rested. I hope you can get at it from the passenger side. I got to it by tearing down my wet bay which was a chore.

You can get to it from the passenger side? That's interesting... I'm assuming that by opening the aft wall in the storage compartment, I will be able to see the circuit board? What was the source of the grey water leak and what did you have to do to stop it? I saw you posted a video on this. I haven't yet watched it, but I was planning on it before tearing apart the wet bay to get to it. Did you do anything special to try and protect the circuit board after you replaced it?

By the way cinergi I also watched your video on adding the diode to the battery bridge and that has worked perfectly too. Your videos are very helpful. Thanks

cinergi · 07-27-2020, 09:32 AM

Quote:

Originally Posted by SteveUpp

You can get to it from the passenger side? That's interesting... I'm assuming that by opening the aft wall in the storage compartment, I will be able to see the circuit board? What was the source of the grey water leak and what did you have to do to stop it? I saw you posted a video on this. I haven't yet watched it, but I was planning on it before tearing apart the wet bay to get to it. Did you do anything special to try and protect the circuit board after you replaced it?

By the way cinergi I also watched your video on adding the diode to the battery bridge and that has worked perfectly too. Your videos are very helpful. Thanks

Thanks!

Yeah you can get to the tanks from the other side .. I just don't know if you'll be able to get at/reach the cables and if there's enough slack to pull them toward you so you can do the replacement.

My leak was due to an improper factory seal on the fitting for the rinse line. If the water level in the tank went above that fitting (about 50%), it would leak. Amazing how bad gray water smells -- I swore it was black water.

I didn't do anything special to protect the new board since I realized what had happened.