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Old 10-28-2021, 06:20 AM   #1
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Join Date: Apr 2021
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Old Duo-Therm Upgrade?

Hi gang,
Were looking at going 2 different directions here and could use some advice on which route to take and how to get to my end goal where I can stay cool in the summer, and use that sweet sweet included in my lot rent electricity to stay warm in winter.

So recently my front AC has given up. The fan motor wont turn on anymore I think it has died. Just to trouble shoot if I grab my Multimeter what sort of voltage or ohms should I get off the solenoid? Next how would you guys go about pulling this motor out? I attached some pictures of the current unit. Looks to me like I got to unscrew everything and hope I can jiggle enough loose.

Route 2

I went and got quoted for a whole new Penguin II 15k unit with a heat pump. The tech told me I need a new thermostat and new control board on the old rear AC. Total cost of the parts came out to a little over $2K! But they said I needed to run a new data cable between the 2 ACs and down to the thermostat. This is a 1998 Newmar Dutch Star so I knew there were going to be somethings obsolete. But I was not expecting the data cable to be obsolete. Honestly have no idea how Id go about replacing that. The dealership quoted me $700 in labor to do the whole job. Has anyone done the project themselves on a comparable unit? I cant find no howtoos or YouTube videos on this. I want the job done right with no cables hanging or something hokey like that.

Want to add that both original units were 15k with heat strips.
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Old 10-28-2021, 07:56 AM   #2
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Location: FL
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You can buy a "backwards compatible" board for about $130. The instructions for changing it are excellent.

I actually sold my old AC and the "new board that I had to remove".

The board lets the AC unit work with the existing 5 button thermostat.

The worst part of the installation is getting an AC unit that is not physically damaged. The box may not show damage but they can look like a train wreck inside.

Two people can change the unit in half a day including the new board.

I have no idea why they think the data line needs replacing. Clean the old ones gently and they should work.
Myron & Deborah
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400 Isl, 400 HP/// Now 450 HP
2016 Ford F150 Limited V6 with Ready Brake
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Old 10-28-2021, 08:24 AM   #3
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It’s because I have a older 4 button unit. They added an extra line in the phone cord when they went to the 5 button.
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Old 10-28-2021, 03:31 PM   #4
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See if this helps you:
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Old 10-29-2021, 06:10 AM   #5
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Just got our couch back 3 days ago after having two Penguin II heat pumps installed. Thought about doing it myself, but at close to 100 lbs per unit, I decided to let our local shop do it. Switched to two thermostats as the DW hated the old 5 button one. Our mechanic had to install wire channels long the ceilings but he always does excellent work and the channels are hardly noticeable. Our total bill was just over $4,100. One of the original units quit and both were over 20 years old so we decided to do both now and not worry about the when the other would die.
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