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Old 06-13-2021, 02:37 PM   #1
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Repair or Replace? 1977 AC/DC/LP Fridge

Hello there beautiful people! I hope your rigs are doing better than mine today! Just returned to my 1977 20ft Class C Brougham after a week away and found my fridge lost its ability to stay cool while I was away. It has been successfully running on AC power for the last 4-5 months. I switched it over to propane to troubleshoot and the coils inside did get a bit colder than they felt when I found it, but not keep your beer cool cold. I'm in central California and the average temperature during the day is about 95-98 degrees. not sure if it just cant keep up anymore or if theres a chance its an easy fix wit a replacement part.



Looking stuff up I've discovered:



Model number for fridge is IM-162


Rough opening measures 22 1/2" x 40 1/4"


Finding a replacement is a last resort as similar sized options are limited and expensive


I found what I believe to be the correct heating element replacement. It's $100 and I'm wondering if y'all think it's a viable solution, or if there are more problems going on with this old 1977 unit.



Should I repair or replace? If I do replace, any suggestions on what machine I should put in its place???
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Old 06-13-2021, 02:53 PM   #2
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1977........hard to believe parts are still available

IM-162??
Never heard of that model number
What Brand is it?


Can't cool on AC element AND doesn't cool on GAS
Doesn't sound like replacing the element would help

Gas/Element generate/transfer roughly same heat energy to boil the coolant and create the process of absorption

Does the boiler tube/stack get hot when using electric//
using gas??

Have you inspected burner area etc for any yellowish residue?
That means a LEAK and unit is DEAD

Brand...and check that Model number again


Dometic Chart
http://w2.distone.com/bradstrailer/d...eplacement.pdf

Norcold Chart
https://thenorcoldguy.com/norcold-te...le-dimensions/
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Old 06-13-2021, 03:18 PM   #3
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The brand is Insta-Matic. I will inspect the rear of the unit for what you mentioned to check out and get back to you... Thanks for the reply!
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Old 06-13-2021, 04:29 PM   #4
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Generic Instamatic manual


https://bryantrv.com/docs2/docs/im272.pdf


There are replacement cooling units made for some, not sure about an Instamatic though. It's an option to check.
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Old 06-13-2021, 06:01 PM   #5
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Originally Posted by Argosy View Post
Generic Instamatic manual


https://bryantrv.com/docs2/docs/im272.pdf


There are replacement cooling units made for some, not sure about an Instamatic though. It's an option to check.
that is a very inclusive manual!!
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Old 06-13-2021, 07:53 PM   #6
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Yea, it surprised me when I scrolled through it.
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Old 06-13-2021, 08:08 PM   #7
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Wow, quite the manual, wish they would make them like that these days.

Imagine if it had all the warnings and cya stuff they got in the new manuals and was printed in three languages, it would be the size of a dictionary!
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Old 06-14-2021, 07:48 AM   #8
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Had one in my 77 Tioga.. Worked great (loved that sight window in the front of the unit) until one day it didn't. After I pulled it out and tried the "turn it upside down trick," I ended up replacing it with a small home unit from HomeDepot. Worked for me until I sold the rig..
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Old 06-19-2021, 12:25 PM   #9
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UPDATE! Propane is working, AC is not

Ive managed to get the fridge to work on propane. My trial and error involved taking nothing apart, just trying again and again. The electric mode is not functioning still.
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Old 06-19-2021, 12:39 PM   #10
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Did you get the wiring info on pg 22?
Did you verify 120VAC is present at the outlet?
Did you verify that 120VAC is going to element?
Did you verify element is even good?

Did you read thru the Manual in link?
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Old 07-04-2021, 02:08 AM   #11
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Now if I could find controler for mine... it cools a bit on ac but gas is not working as the igniter quit and I think it got broke by me trying to hard to lite it
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Old 07-04-2021, 03:22 AM   #12
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Here’s a little info I found in this book cover and pages pertaining to your fridge, great book to have got mine on kindle.

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Old 07-05-2021, 09:39 AM   #13
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I see many rv fridges on FB Marketplace may need some patience or extra work to get a good fit.
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Old 07-05-2021, 10:44 AM   #14
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Quote:
Originally Posted by 153stars View Post
I see many rv fridges on FB Marketplace may need some patience or extra work to get a good fit.
I've been looking on FB Marketplace for a replacement fridge for a few weeks now. Haven't found on example that uses dual power sources to make it run. They're either 12V or 120V only. My search string is "RV Refridgerator".

Perhaps I'm doing something wrong? I'd take any advice! Thanks.

Greg
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