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Old 07-18-2021, 10:28 AM   #1
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2020 Interstate 19
Hammondsport , New York
Join Date: Jul 2021
Posts: 6
Macerator fuse location

Iím a new-to-me owner of an Interstate 19 Tommy Bahama. The sprinter is a 2019 model, but the sticker said it was a 2020 Airstream. Not sure that matters.

I have quite a few issues to work through and plan to take it to the Airstream dealer in Buffalo NY. Issues include a not-yet-functional LP system, awning not extending/retracting, step not extending/retracting, and macerator pump not operating. I am able to turn the blade manually so I donít think it is stuckÖ hoping this might be a fuse issue.

Iíve studied the manual, including wiring diagrams, but Iím still stumped about where the fuse is located. I *think* it is in the box under the passenger side jump seat from reading prior posts in this forum. The labeling doesnít make it obvious, though I believe thereís only a single 20A fuse there. Is that the likely one?

The grey and black valve controls work fine, the hose retract works fine. But when I flip the pump switch, nothing.
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Old 07-19-2021, 04:34 AM   #2
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2017 Interstate Lounge Ext
Mount Jackson , VA
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We are newer AI owners and learning the power and water systems takes time. You are correct, the macerator pump fuse is under the side jump seat on the driver’s side. I found the fuse designations in my Airstream manual. I think it’s available on line as well. Your step is run by the chassis battery and the fuses for chassis diagram came in a separate booklet for the Sprinter. Our AI also straddles two years. Sprinter is 2016 and the Airstream is 2017. Don’t get discouraged. It will be worth the learning curve once you hit the open road. We love it!
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Old 07-19-2021, 05:38 AM   #3
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2020 Interstate 19
Hammondsport , New York
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Quote:
Originally Posted by MountainLife View Post
I found the fuse designations in my Airstream manual. I think itís available on line as well.
Thanks for the tips. Iím curious where you found the fuse designations. Iíve poured over the 2019 and 2020 manuals and I find vague references, plus wiring diagrams that are mostly indecipherable (and Iím an electrical engineer). I wonder if the manuals have changed a lot over the years, or if Iím just missing something right in front of my nose.
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Old 07-19-2021, 11:38 AM   #4
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2017 30' Classic
Carlisle , Pennsylvania
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Hi

Something to consider:

The Airstream factory is over in Jackson Center OH. It's not a crazy long drive from your location. Service at the factory is normally first rate. Cost wise it's no better / no worse than the typical dealer.

Why make that drive? There are a number of dealers out there that are not as good as they should be when it comes to service. I know absolutely nothing at all about the dealer you are looking at using. They could be the best one in the world. I would check their "abilities" out .....

The downside of any RV service right now is getting an appointment. If the outfit is good, they are booked out a ways. Even if they aren't very good, there still may be a bit of a wait ....

Bob
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Old 07-19-2021, 05:35 PM   #5
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2020 Interstate 19
Hammondsport , New York
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Originally Posted by uncle_bob View Post
Hi

Why make that drive? There are a number of dealers out there that are not as good as they should be when it comes to service. I know absolutely nothing at all about the dealer you are looking at using. They could be the best one in the world. I would check their "abilities" out .....

The downside of any RV service right now is getting an appointment. If the outfit is good, they are booked out a ways. Even if they aren't very good, there still may be a bit of a wait ....

Bob
Thanks Bob - Iím definitely considering that. About a 9 hour drive for me. The NY options seem to be very far outÖ will try to talk to Airstream central tomorrow.
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Old 07-20-2021, 04:26 AM   #6
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2017 Interstate Lounge Ext
Mount Jackson , VA
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Fuse label

I finally remembered that the fuses are labeled right next to each fuse in the 12v power system located under the jump seat. Macerate fuse is circuit 9 and 20 amps. Weíve replaced it a few times when our macerate kept jamming. The fuse protected the macerate as it should. Hope that helps.
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Old 07-20-2021, 07:38 AM   #7
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Originally Posted by CavemanB View Post
Thanks Bob - I’m definitely considering that. About a 9 hour drive for me. The NY options seem to be very far out… will try to talk to Airstream central tomorrow.
Hi

Except for the inevitable construction, it's a pretty easy drive. I've done the interstate part of it a *lot* of times. If you are a Harvest Hosts member, there are some pretty good stopping points along the way to break up the drive.

Once you get to JC, the "camping" is free if you are getting service. Even if you aren't it's still dirt cheap for full hookups. The downside is that they come get your RV at some ungodly hour ( 7 AM ... I try to forget major trauma like that ... ). If you are in a van (with nothing in tow), you are sort of stuck there at the service area while they do the work.

With the border opening up, CanAm in Ontario might be on the list. I *assume* they do work on vans .....

Bob
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Old 07-21-2021, 06:38 AM   #8
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2020 Interstate 19
Hammondsport , New York
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Quote:
Originally Posted by MountainLife View Post
I finally remembered that the fuses are labeled right next to each fuse in the 12v power system located under the jump seat. Macerate fuse is circuit 9 and 20 amps. Weíve replaced it a few times when our macerate kept jamming. The fuse protected the macerate as it should. Hope that helps.
Thanks so much - thatís exactly what Iíve been looking at and is nice to see that it is called out clearly on your labels.

Iíve attached mine - doesnít help that the label was printed offset, clipping some of the text, but I donít see macerator anywhere on mine. Am I missing something? Does this mean my fuse is likely elsewhere? Or just on one of these circuits but not actually labeled?

The 20 amp fuse in my panel is not blown, so Iím wondering if I actually have a blown pump.
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Old 07-21-2021, 10:33 AM   #9
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2021 Interstate 24GT
Magnolia , Texas
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Quote:
Originally Posted by CavemanB View Post
Thanks so much - thatís exactly what Iíve been looking at and is nice to see that it is called out clearly on your labels.

Iíve attached mine - doesnít help that the label was printed offset, clipping some of the text, but I donít see macerator anywhere on mine. Am I missing something? Does this mean my fuse is likely elsewhere? Or just on one of these circuits but not actually labeled?

The 20 amp fuse in my panel is not blown, so Iím wondering if I actually have a blown pump.
I downloaded your AI 19 owners manual. Looks like your macerator circuit is NOT on the regular fuse panel but on a separate fused busbar with self resetting circuit breakers (see pic1, yellow highlights below). That bus bar on mine is hiding behind a 4 screw panel to the left of the fuse box (see pics #2 and #3). If I were trying to troubleshoot this, I'd first test for 12 volt power at that busbar circuit (shows it as an orange/white wire on your wiring diagram). If no power there, then it's the circuit breaker. If power there, then test at the macerator switch, and then with the switch on, again at the pump. If the wire is hot all the way, it's the pump. If it's hot at the circuit breaker but not at the pump, then likely a problem with the switch.





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Old 07-21-2021, 12:18 PM   #10
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Green Cove Springs , Florida
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I will say the complicated switch panel on the side of the van with controls for the macerator pump, the valves and the macerator hose reel is a festival of opportunity for dirty contacts that can interfere with operations.

At one point my macerator hose reel stopped retracting, though it would still unreel. Turns out the issue was a dirty contact behind that panel. I opened that panel, carefully slid each suspect wire, one at a time, off its respective pin, sprayed contact cleaner liberally about, and pushed the wire back onto the pin. Voila! Hose reel worked again. Super cheap fix, something to consider.
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Old 07-22-2021, 04:55 AM   #11
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2020 Interstate 19
Hammondsport , New York
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Quote:
Originally Posted by WeekendBob View Post
I downloaded your AI 19 owners manual. Looks like your macerator circuit is NOT on the regular fuse panel but on a separate fused busbar with self resetting circuit breakers (see pic1, yellow highlights below).
I was wondering if the lack of a fuse indication on that drawing meant it was isolated that way. I know where to look now and will do some testing. THANK YOU all and I’ll report back soon.
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Old 07-22-2021, 07:25 AM   #12
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2014 Interstate Ext. Coach
Cedar Rapids , Iowa
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Itís usually the fuse on the power supply panel that blows. Donít sweat it, they blow super easily for the macerator when and if you have problems. Pretty much when. Itís probably better for it to blow than you to have a major backup when it isnít working quite properly and/or stuck, if you think about it in those terms.

My recommendation is to make sure you have a fuse kit with you at all times. Youíll thank yourself later.

I just replaced the fuse for the awning this spring. Thankfully I thought of checking the fuse and had a fuse with, otherwise Iíd been listening to the warning beep for a two hour drive home. Just part of owning a RV, you have to learn to troubleshoot on the fly. Unfortunate to have issues from the start.

You might have a loose wire or broken wire under your Interstate. Not the easiest to crawl under it to check but might be worth your time, especially with your step not functioning either. They are fairly close to the same location, at least on our model.

Welcome to the ownerís club! Safe travels-
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Old 07-22-2021, 12:22 PM   #13
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Raymond , Iowa
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Interesting that they changed to macerator from a blade fuse to a thermal breaker. On mine the thermal breakers are for the lounge motor, solar controlled to battery, Kenwood radio, gray/fresh heat pads, and a feed through the cut-off switch to the blade fuse panel. Guess that was their solution to blowing macerator fuses.
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Old 07-22-2021, 04:17 PM   #14
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Good note Titus, I had missed that last post that they are not a fuse but a circuit breaker.
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Old 07-23-2021, 04:18 PM   #15
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Update: tested voltage on the bus, at the switch, and at the pump. Had 12V / 12V / 10V so it looks like the pump is the problem. I have a mobile RV guy coming on Monday so hopefully a replacement is in our future. Thanks all for the help.
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