Dometic RMD8555 Frustration - Page 14 - Escape Trailer Owners Community

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Old 09-03-2016, 08:12 PM   #131
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RMD8555 too cold?

We have had our fridge for a bit over a year, and it was always marginal -- temps in the high 30s, and sometimes the 40s if the weather was really hot.

I made a couple of changes this summer:
1) I replaced the propane regulator with this one.
2) I moved the thermistor from its usual location to the very top of the fins. it is just resting there -- not screwed in.
3) I got some the sensors that Fudge Brownie recommended. I don't believe that changing the sensors had much effect on the fridge performance, but who knows.

We have been on our fall trip for 5 days now, and while the temperatures have been cooler, the difference in the fridge performance is astounding. The bottle of root beer we had in the fridge door is frozen solid. According to the sensors (which have not been calibrated, the fridge is about 29-30 degrees and the freezer is -3 degrees (fahrenheit). I cut the fridge back to "3", a few of hours ago, and we are now at 35 degrees. i am going to keep on monitoring it, but obviously something has changed. we are currently running on electric but the performance on propane is also noticeably improved.
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Old 09-04-2016, 08:37 AM   #132
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Check Your Gasket

I found the lower door gasket had come loose, not easily noticed unless you are looking for a problem.

Leon
I did not calibrate the sensor but from what I did measure it was quite accurate. I use one for outside temps as well.
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Old 09-04-2016, 09:24 AM   #133
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Fridge still too cold

We set control back to 3, but it is only 28 degrees in the fridge this morning - everything frozen! So I switched it back to propane to see what happens there. Maybe I pulled a wire loose from the fridge when I moved the thermistor. But this tells me that it is possible to make the fridge cold, even when it is 80 degrees out during the day. When we return I am going to pull the fridge and make sure that I didn't pull out a wire, perhaps add a bit of insulation, and see where we go from there.
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Old 09-04-2016, 09:52 AM   #134
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Leon have you ever thought about replacing the stock thermistor with an adjustable one like this.
http://www.snip-the-tip.com/RM8XXX.html
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Old 09-04-2016, 10:08 AM   #135
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This makes me again wonder why this type fridge is not offered with temperature controlled cooling.

With the wealth of inexpensive computer control chips now available, it would seem that it could be accomplished without hugely increasing the costs. With LP the flame would need to be adjusted and with AC/DC the current controlled, both of which seem comparatively relatively easy - especially with AC/DC. LP would need a electronically controlled flow valve, perhaps those are still quite expensive?

But I would think many people would be more than willing to spend more and have less need of constant monitoring. Early morning coffee drinking postulating - maybe I am missing some large reason?
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Old 09-04-2016, 11:10 AM   #136
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Originally Posted by thoer View Post
This makes me again wonder why this type fridge is not offered with temperature controlled cooling.

With the wealth of inexpensive computer control chips now available, it would seem that it could be accomplished without hugely increasing the costs. With LP the flame would need to be adjusted and with AC/DC the current controlled, both of which seem comparatively relatively easy - especially with AC/DC. LP would need a electronically controlled flow valve, perhaps those are still quite expensive?

But I would think many people would be more than willing to spend more and have less need of constant monitoring. Early morning coffee drinking postulating - maybe I am missing some large reason?
Hi: thoer... Basically component Mfg's seem lazy and slow to change. The door on our RML8551 was the same model as the ones designed to be reversed L to R even though they couldn't be!!! That's when I found that, while using the MaxxFan on exhaust, so much cold air was being sucked out of the fridge box. At the same time that air was being replaced with hot incoming air up the drain tube. Alf
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Old 09-04-2016, 11:48 AM   #137
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We have a 2016 Escape 21 with the RMD8555 fridge. I live in central Texas with temps in the high 90-100's. We had intermittant issues of it not staying cold, getting up to 50degrees at times, w/ice cream melting in the freezer. This was with it on propane or AC. Reace tried to troubleshoot over the phone, but still had issue.
We took it to a Dometic service dealer and they replaced the circuit board and installed a new fan switch on the outside. (covered by warranty). They said Dometic told them this is a known problem with this model. Right now, the fridge temperature is about 38degrees, on AC. We are going on an extended roadtrip and hopefully this will solve the issue.
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Old 09-04-2016, 11:55 AM   #138
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Quote:
Originally Posted by txruby77 View Post
We took it to a Dometic service dealer and they replaced the circuit board and installed a new fan switch on the outside. (covered by warranty). They said Dometic told them this is a known problem with this model.
I've no doubt that Dometic told them that, but I also have no doubt that Dometic often doesn't know what they're talking about. A simple search of all the ongoing fridge threads will give you the sense that Dometic is a company where one hand doesn't know what the other hand is doing.

Your fridge performance right now is similar to ours with the same model. Hopefully you're now good to go.
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Old 09-06-2016, 06:45 PM   #139
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Originally Posted by fudge_brownie View Post
I found the lower door gasket had come loose, not easily noticed unless you are looking for a problem.

Leon
I did not calibrate the sensor but from what I did measure it was quite accurate. I use one for outside temps as well.
These sensors are very cool. Received mine today. Thanks for the recommendation.

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
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Old 09-06-2016, 09:58 PM   #140
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Agreed! I lucked out and got one on a daily deal for $38. I'm impressed. It works great.

I have it sitting in my living room right now. When I pull up the App, it's easy to see when the AC ran. The temp and humidity both decline pretty fast and gradually drift back up when it stops.
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