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Old 05-26-2020, 07:14 PM   #1
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2021 37MBH AC issue

Just picked up my new 37MBH and took it out the first weekend. We live in south Fl and deal with 90+ degree days. The rv got up to 82 in the main living room during the day and 85 in the bedroom. Has anyone has experience with the silverback in Fl heat, if so how did it hold up, do I have a bad AC? Has anyone added a 3rd Ac to combat the heat.
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Old 05-26-2020, 07:23 PM   #2
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What was the temperature outside during the day? How cold was the air coming out of the vents?
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Old 05-26-2020, 07:27 PM   #3
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It was about 90. AC was set to 73 and was there at night, when the sun started to beat on it is when we were in trouble. The air intake was pulling air in at 87 and pushing out of the closest vent at 77 (using a laser thermometer)
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Old 05-26-2020, 07:39 PM   #4
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I don't know if those numbers are typical. However, usually rigs heat up from the windows, roof vents and doors being opened. It doesn't take much for all your a/c to escape through an opened door.
Some people use a material called Reflectix to insulate the windows. Others have used insulated panels.
Parking under a tree helps too.
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Old 05-26-2020, 07:41 PM   #5
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This is my 3rd rv. Never had this issue but I have also never had the whisper quiet system.
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Old 05-26-2020, 07:44 PM   #6
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You might want to call the dealer and see if this is normal for the a/c on your rig.
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Old 05-27-2020, 03:10 PM   #7
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Usually you should be getting a 20* (+-3*)differential across your AC. Meaning 93* return air should be 73* supply air. That is if the unit is working properly and sized correctly. Humidity will also affect the differential temperature. It sounds like your AC is low on charge.
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Old 05-27-2020, 04:00 PM   #8
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Thank you, Took it into the shop today. Ill let you know what the outcome is when I find out
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Old 05-27-2020, 05:24 PM   #9
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I hope I'm wrong, but I won't be shocked if the shop tells you everything is OK.

How many AC units do you have? Our CC has 2 and they do a pretty good job of keeping temps down.
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Old 05-27-2020, 06:02 PM   #10
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2 ACs. I called FR today and they sent me the appliance install sheet which has the serial numbers of each unit. They filled the SNs in the cottage series section so it looks like they installed 13.5k units not 15k which was on my order form. Iím going to call the shop tomorrow to find out what is actually on the unit. I called demetic today as well and they could not look up SNs to identify what size they were.
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Old 05-27-2020, 06:31 PM   #11
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We have a Hathaway with two 15,000 units.

Fiver is 37’

In Houston on a day over 100 they were, ok. Rv was below 80. No shade.

90 would be fine for ours. Both units would cycle some.

YouR unit is somewhat longer.
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Old 05-29-2020, 09:01 PM   #12
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Quote:
Originally Posted by Vorch2001 View Post
2 ACs. I called FR today and they sent me the appliance install sheet which has the serial numbers of each unit. They filled the SNs in the cottage series section so it looks like they installed 13.5k units not 15k which was on my order form. Iím going to call the shop tomorrow to find out what is actually on the unit. I called demetic today as well and they could not look up SNs to identify what size they were.
That's what happened on my 2016, they are putting in a 15000 this June at the dealer I bought it from.
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Old 06-03-2020, 08:48 PM   #13
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On our 2019 37MBH FR replaced the main A/C unit under warranty as it leaked refrigerant and although it was cool it wasn't cold. With both front and back units running, it does well at keeping the camper cool even when we were in the hot Orlando sun. Keeping the shades down helps tremendously.
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Old 07-13-2020, 04:55 PM   #14
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Originally Posted by Vorch2001 View Post
2 ACs. I called FR today and they sent me the appliance install sheet which has the serial numbers of each unit. They filled the SNs in the cottage series section so it looks like they installed 13.5k units not 15k which was on my order form. Iím going to call the shop tomorrow to find out what is actually on the unit. I called demetic today as well and they could not look up SNs to identify what size they were.
What did you find out on this??
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Old 07-13-2020, 05:39 PM   #15
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Forgot to update this post, here it is.

The unit is supposed to have 2 15K ACs. We found out FR installed a 15K and a 13.5K. FR stepped up and is replacing the 13.5K with the correct 15K unit.

The repair shop also found that the return ducting for both ACs are collapsed and have some wood protruding into the duct restricting the airflow to the unit which is causing both ACs to freeze up during the day even with the fans turned to high. This was all found by sticking a scope camera into the return duct.

Again FR seems to be stepping up to fix this, they are picking the unit up to take it back to the factory for a full repair. I am waiting on the pickup date (Should be this week). Once I get it back I will update on what they did to fix it.

FR and Cedar Creek have been very helpful through this whole saga, hopefully, we can get past this to a working RV in the next few weeks.
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Old 07-13-2020, 08:45 PM   #16
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Originally Posted by Vorch2001 View Post
Forgot to update this post, here it is.

The unit is supposed to have 2 15K ACs. We found out FR installed a 15K and a 13.5K. FR stepped up and is replacing the 13.5K with the correct 15K unit.

The repair shop also found that the return ducting for both ACs are collapsed and have some wood protruding into the duct restricting the airflow to the unit which is causing both ACs to freeze up during the day even with the fans turned to high. This was all found by sticking a scope camera into the return duct.

Again FR seems to be stepping up to fix this, they are picking the unit up to take it back to the factory for a full repair. I am waiting on the pickup date (Should be this week). Once I get it back I will update on what they did to fix it.

FR and Cedar Creek have been very helpful through this whole saga, hopefully, we can get past this to a working RV in the next few weeks.
I probably could go back to the beginning and search all the posts in this thread, but was wondering what unit you have as it's not in your signature. Thanks

Edit: Did go back and check previous posts and see you have a 37MBH. Still would be nice to see in your signature.
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Old 07-13-2020, 08:47 PM   #17
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Cedar creek sliver back 37MBH
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Old 07-19-2020, 08:37 PM   #18
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We have the same Cedar Creek and same problem. I will request the build sheet tomorrow. I know my return ducts look collapsed from the area that I can see.
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Old 07-19-2020, 08:41 PM   #19
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I ordered a cheap scope cam from amazon. Take pics and send them to forest river.
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Old 07-21-2020, 04:25 AM   #20
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Originally Posted by Vorch2001 View Post
Just picked up my new 37MBH and took it out the first weekend. We live in south Fl and deal with 90+ degree days. The rv got up to 82 in the main living room during the day and 85 in the bedroom. Has anyone has experience with the silverback in Fl heat, if so how did it hold up, do I have a bad AC? Has anyone added a 3rd Ac to combat the heat.


We have that model in 2020.5....that sounds about right to be honest. This thing is just huge and takes a lot to keep it cool. One major source of heat, especially towards the front of the unit is the skylight over the shower. We covered that with reflectix and helped tremendously. Temps will still get in to upper 70ís to around 80 in mid afternoon if highs in 90ís with high humidity. We are going to add a third non ducted unit to ours just to dump cold air in the kitchen/living room area as a safety net. Good luck to you.
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