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After reading @aaronorange recent post about their missing furnace knockout, I was thinking that they would have benefited from a borescope to look for it. My daughter gave me one for Christmas last year and it’s been way more useful that I would have ever believed. I use it all the time, especially in the Oliver. I’ve found wire routing paths, looked in concealed spaces, found dropped screws. I even found a lost factory screw that was grinding away under the sewer pipe. The price for a horoscope varies from around $30 to hundreds of dollars. Vevor company has models for around $65 that are ideal. It’s one of those tools you don’t know you need until you have it. Cheers! Geoff

Yes, Then you truly have a missing "knockout" as Craig astutely noticed, and again as he recommended you should let OTT service know by opening a ticket, and reporting such. Be sure to add your OTT model year to your salutation as that helps all responding better understand what the issue may be. B~Out

[Disclaimer I have no association with, or financial involvement with Garmin] Just now, Garmin "Cyclops update for North America software update" available, not sure if new, or the update was not downloaded and applied earlier. The Garmin RV890, If you use this to plan trips, be aware that it is a “Real-Time” device. By that I mean if you are actively planning a trip during the winter (Nov-Feb, Mar) months, to and through Alaska, the NWT, Northern Quebec, Labrador, or other places where the roads are not passable during the winter months, the RV890 will not allow you to route through these areas during those winter months but may re-route you many ,000 or mi/km via another route. At least has been my experience. As you get closer to your departure date and the routes you want to take are no longer impassable due to snow, the RV890 may (if you choose shortest distance option) allow you to route the trip the way you want to go. i.e., If planning a trip from FL to AK, and you plan on leaving in May, you may not have passable roads in parts of AK until late May, so you may have to wait until closer to AK to get the RV890 to take the route you want. I believe this was done to prevent RV890 users from being routed through unsafe routes, or worse. I do not know if these “Garmin” updates which come from time to time would update “seasonal” route openings/closings. My guess is if a route is blocked by a major land/mud slide and it is obvious it is not going to be passable for some time, then that information would “hopefully” be on a Garmin update. I do know when we were travelling to Tumbler Ridge, BC in ’23 or ’24 while it was in the early stages of a BAD FIRE, the only thing suggesting “not passable” were the Mounties actively closing roads behind us as we made it to the town, then exiting out our “pre-planned” route away from the active fire. By the time we were back to an area where we could check our RV890 for routing, the route in had not changed. B~Out

Thanks to all that read and replied! Never found the missing knockout. Searched under the floor with my phone camera and inside the heat chamber. I went ahead and covered it with sheet metal and furnace metal tape, and all is back to normal. As stated earlier, all other ductwork is attached. To answer SNY SD UP, yes, I did modify the ducting to get better flow into the bathroom back a couple of years ago. Our ductwork is similar to yours, featuring one rear flex duct that turns 180° to head towards the front of the trailer, and another facing the front of the trailer. When you say galley side knockout, are you referring to the side facing forward to the galley/kitchen or to the center aisle, as in our case, having twin beds? Our missing knockout faces the center aisel. The photo was taken through the removable acsess port under curbside bed, Thanks again!

And when at a location that i can get a good iNet connection, i will check to see if any updates. I want to make sure that the "navigator" has most recent updates...

Hi Folks - we're hull #1673, 2026 LEII; we live in Maine. I'm reaching out to CGI to try to arrange ceramic coating while they are here; their large number of Olivers coated seems a great recommendation. Also wondering if anyone has any experience / insight on ceramic coating companies in Maine... any thoughts appreciated. Thanks!

Congratulations! We’ve got three left, MN, WI and MI. Not sure when we’ll be able to travel north but will probably hit all three on the same trip. Mike

Good idea - I do the same. I know that one of the "system" updates is for the Andriod part of the internal workings of the 890 (and 1090) - so, it must be fairly important. Bill

thank you Bill, I always check for updates before doing anything new on the RV890. One of the Checklist items before we leave is to check for updates. B~Out,

Have you done any mods to the duct work based upon "Snackchasers" post, if so i would look for a disconnect of ductwork from that port. Your Oliver is #1238 what year s/b on your signature? it would be interesting to see if the factory has changed the heater duct runs based upon Snackchasers changes... it appears as though Oliver has changed the open heater ports, so this one appears to be facing the galley, as you can see it from the galley access port. Back in 2020 (our model year) there was one open towards the rear, which must do a 180 to head towards the front of the trailer and one facing the front of the trailer. Our galley-side port still has its knock-out port intact. For me it was like a "Fun House" optical illusion for a minute until realized what i was seeing based upon my 2020 experience.... B~Out

Congrats! Alaska next.....

Congratulations -- that is exciting! Are you heading to Alaska next?

This must mean your ducting is detached from the furnace somewhere, or you have a large hole in the ducting. It's a pain when traveling, but you'll need to get under the curbside bed again to fully diagnose and correct. Most of these furnaces have forced air coming out fore and aft of the furnace. Check there first and then follow the ducting forward. If you can't see it quickly, run the furnace while you have the basement open and you should feel a lot of hot air blowing somewhere! We'll be thinking of you, as you head north and it gets hotter and hotter in Arizona. Have a great trip! 😎

routlaw, thanks for checking with us 😀We did look under the bed that’s how we found the opening and the rest of the duct looks secure. I’ll let everyone know what I find once we get parked for the night.

How long did this milestone take you to achieve? Any idea of the total miles? Congrats! Bill

Thanks, that’s what I was thinking but didn’t see the knockout in plane site. I’m going to take a mirror to see if it slid under the floor. 😀 We are slowly making our way to Alaska from Arizona. Currently in Idaho and we are definitely using the heater. 🥶⛄️.

Difficult to tell from the existing picture but it's also possible the duct work has dropped out of the knockout panel. If you haven't already I would move your bed aside, open the hatch from above to make sure the duct has not vibrated loose and onto the floor.

Thanks, that’s what I was thinking but didn’t see the knockout in plane site. I’m going to take a mirror to see if it slid under the floor. 😀 We are slowly making our way to Alaska from Arizona. Currently in Idaho and we are definitely using the heater. 🥶⛄️.

Jd, my Oliver came with Furrion fs65w speakers. They have white grills and at $20 each on Amazon they are a bargain. You might spend as much just changing the grills. I actually looked into replacing the Furrion speakers with Polk Audio DB652 to improve the sound. They have a broader frequency range and the sensitivity is improved from Furrion’s 86dB to 92dB. However, they have black grills, would need a 5.5” to 6” adapter, and they are about $50 each. The return didn’t justify the cost. I took another route and painstakingly measured the Furrion’s speakers Fs (free-air resonance frequency) to determine if a 3-D printed sealed enclosure or baffling would improve their sound. This involved injecting a range of frequencies through the stereo, then measuring the voltage at the speaker terminals through a 10 ohm resistor. The highest voltage was at 188 Hz, which is the point where the speaker resonates most freely. This indicated that the speaker suspension was on the stiff side and improvement was unlikely After all that, just the new IVR stereo was enough improvement that I completely forgot about replacing the speakers. Cheers! Geoff

The 48th state was Rhode Island. We completed the last fifteen (15) states over the past 12 Months. Newport, RI was a fun town to complete the job.

I had a similar experience when I needed one of the four screws that hold the Dometic AC cover on. I called and was told they would “take care of me”. In a few days I had a bag of 6 screws. No charge. Mike

There are both map and system updates available from Garmin. The maps update only take a couple of minutes while the system update takes 10 to 15 minutes. Bill p.s. these updates are for (at least) the 890.

You can drill with the collar in place, either a 1/4" self-drilling screw, or drill a hole for a #8 sheet metal screw. Best to tape it on before screwing, otherwise the holes can be hard to re-align. Those collars are a pain to install, and you were right to tape it in place. There was another post today where it looked like the blank hole seal might have fallen off someone's furnace. The PEX lines are definatly in the way, my duct was squashed to fit through, and the water heater by-pass valve handle had worn a hole in the duct. While you're in there, take a look at the water heater plumbing. There is a by-pass loop and valve to isolate/by-pass the water heater. This was one of the lines interfering with my duct. I removed it, mostly because I put in a hot water recirculating system, but it opened up space too. I don't anticipate ever needing to by-pass the water heater like that, and most folks probably don't even know it's an option because the valve is hidden under the duct. If there is ever a problem during travels, I'm just shutting the water off or bypassing the water heater by other means.

Wow! That's even better than a trip to the local hardware store, except you probably didn’t get popcorn like I do! Mossey

i was wondering about that. i did not see any screws, glad I asked. here is a picture of my beveled connector collar. Did you twist & remove the connector collar to drill that hole? I accidently removed mine when working the elbow on to it. Took me 10 mins to get it inserted & locked in just right. that is why my foil tape is there to stabilize it, in case i go the "Screw the 180" route. Now i might bring my 180 with me and try to do that mod on the road if things are a bit chilly inside. Maggie said that she felt a lot of heat coming out of the shower exhaust next to the TP caddie. i was reading but did not catch if you mentioned, Did you replace any pex to move the line that is "Right in the WAY!!!" to connect the under the bed exhaust vent? Boy-h-boy, they sure did want us to have a nice 45 elbow in there. The way i see it is, if i can move the water line, then i can have a Rigid Tee in there on the way to the Kitchen Exhaust.