Question about Dometic 57915531 Air Conditioner

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Can the duothermo model # 57915.513 be recharged.

A copper pipe fitting broke causing the unit to lose all refrigerant. I have soldered a new fitting in but do not know if it possible to recharge the system. I have heard it is possible to solder a saddle valve into the system. Is this true? If so, where does one find the valve? What refrigerant do I need? Is that refrigerant available to the retail public?
Thanks much, Dan

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You will need R-22 refrigerant. Yes you can install a sattle tap valve. The problem is that you mean the public cannot buy saddle taps or freon do to enviromenalist

Posted on Feb 11, 2009

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Remember, that COLD water might cause condensation as it nears the Hot Water tank--

However, you seem pretty sure it was leaking-- so-- What type of piping are we working with: Copper, Plastic, or what?

Copper is the best-- but requires soldering fittings-- are you equipped to do that?

Plastic has shrink and expand problems around a Hot Water tank, and might be why you have the leak?

Tell us more, -- how far do you want to get into this?

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Hi, when the copper lines at the condensing unit, the larger of the 2- start to form ice, you have a freon leak. The unit is new, so I would expect the leak to be at one of the welded/brazed joints. What will happen, is the indoor unit, the evaporator coil will start to ice over and block off all air flow through through the coil. I hate to tell you this, you will need to call the installer out to do a leak check on the unit. They will then need to pump it down, braze the leak with sil-phos, or silver solder and recharge the unit. This is the problem, I see this a lot on new units. Someone forgot to do a leak check on it. Being only a month old, it has to have a warranty on it, shouldn't cost you a dime, but this is the problem, indeed!! Please keep me updated on this and get them out there. It will never cool until they fix the leak and recharge it. Please don't forget to rate me on this, I know you will be kind. Keep me posted and you can contact me by my user name below. Thank you Zeke! You still have freon in the unit, just low enough to start the suction line outside to start to ice and loose your cooling.
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It can probably be soldered ... then recharged. Seek help from your professional RV repair shop.

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