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Old 12-10-2017, 10:45 AM   #1
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Join Date: Apr 2015
Posts: 178
on-going problem re: silverleaf original style tank sensors

This has been an on-going problem since we bought the coach; ('06Apex40). The module in the waste tank compartment, indicates that it is operating properly, red&green leds are indicating properly. Have replaced all sensors and transitional connectors. Silverleaf screen by drivers seat works erratically, (when in tank mode) sometimes showing a full watertank, sometimes empty. Same with LP readout. Black and gray tanks always read empty. The only thing left to replace is the module I mentioned earlier.
Until this problem is resolved, eventually, I can deal with the minor in-
conveniences, but I have stumbled onto a problem that isn't so minor. The silverleaf system with all of its' gee-whiz attributes, won't let me fill the water tank when the system says the tank is already full. When you hook up city water to the hose reel, you will get either city water throughout your system, or if your tank is less than full, water will be routed to your tank, and will fill until full, then shut off automatically.
So here's what I get; if the readout happens to be saying empty when I want to fill the tank, that's fine; it fills, and fills, and fills until it runs over.
(I found this out the hard way with a flooded basement). OR, if the readout happens to say the tank is full, when it's not, I get no water at all. Then it gets tricky. I have to backfill the tank through the drain line.
I've learned that when I have to fill the tank this way, I must open the storage slide-out, and worm my way in there enough, so that with the aid of a flashlight, I can monitor the water level until I'm ready to shut it off.
I'm sure the solution to this problem would be simple, if I were parked out-side the Silverleaf facility, but that's about 1,000 miles away.
Dudley Do-Right, '06Apex40MDTS

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Old 12-10-2017, 12:35 PM   #2
Junior Member
Join Date: Oct 2017
Posts: 19
Do a search on Silverleaf issues, I believe the exterior temp sensor has gone to ground, this will upset the Silverleaf computer, and erratic or spurious operation will occur. Disconnect the temp sensor, it should be in the bottom of the tank bay, passenger side if you have 3 slide coach, not sure on a 4 slide coach.

Find my post (about 5-6 years ago) about this issue.

Alpine APEX 40MDTS S/N 75715 - Master Certified RV Technician-Retired - Computer Specialist Retired
US Navy Veteran-Vietnam-Cold War Period
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Old 12-10-2017, 07:38 PM   #3
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Join Date: Apr 2015
Posts: 178
thanks for the reply, Old RVer, I have had that advice before, and followed it; however that made not one whit of difference. The only thing I haven't replaced is the module to which the temp. monitor is connected. Since all signals pass through this device be-
fore going forward to the Silverleaf display, I'm beginning to suspect it,even though its
red and green leds are saying it is OK.
Dudley Do-Right '06 Apex40MDTS
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