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Options For Replacing Dometic Air Conditioner 991762457  

Question:

I need to replace my RV AC. It is a Dometic MFG 459516.711CO / Prod 991762457. Do you have a direct replacement? I just want to make sure I dont need to modify the opening or the wiring. Thanks

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Expert Reply:

Hello Timothy, thanks for reaching out. I was not able to find any direct references for the part number 991762457, but we may still have a replacement for you. It would not be a direct replacement though. You should be able to replace it with one of the Advent units, but we will first need to determine what BTU rating your AC is, and what type of plug it uses.

First, remove the shroud and check the BTU rating of your current unit. You'll want to match or go higher than your current rating. The # ACDOM135B has a 13,500 BTU rating. If you have a 15,000 BTU rating on your current unit you'll want the # ACDOM150B instead.

Second, remove the cover of your air distribution box and you'll want to look up into the opening for the controller. There will be a wire harness coming down from the rooftop unit which will plug into the controller. If it's a 6-pin like I have pictured below then the # ACDOM135B will be able to plug right into the controller.

If you have a 9-pin then you most likely have a heat pump and will need the to replace the entire system with either the # ACM135BC or # ACM150BC.

Leave a reply below with any other questions or comments and I will get back to you.

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Jesse M

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