Question about Dometic Rooftop RV Air Conditioner

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Can you recharge a model # 57915-531 air conditioner

The fan motor had seized up and had to have it replaced. Now the unit is not cooling at all. Could it be needing freon?

Posted by Anonymous on

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  • Dometic Master
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They dont have a service valve for charging. probably electrical issue.

Posted on Aug 16, 2015

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Posted on Jan 02, 2017

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SOURCE: RV air conditioner. Compressor running, fan stops before cool

The fan motor is getting hot and going off on the internal overload in the motor.
This is caused by either a low voltage, a bad capacitor, or tight or dry bearings in the motor.
To check the bearings turn the power off to the unit, then spin the fan blade if it spins freely then the bearings are ok.
To check the capacitor you will need some kind of tester or you can buy a capacitor and replace it, that's what a lot of people do. They usually don't cost very much.
To check the voltage you will need a voltmeter and measure the volts at the unit.

Posted on Jun 09, 2009

  • 52 Answers

SOURCE: Dometic duo therm does not cool or heat...

it should never have to be recharged unless there is a leak. so you should isolate the leak with dye injectable into the system w/ the freon and correct it, then fully recharge system.

Posted on Jun 10, 2009

james3751
  • 614 Answers

SOURCE: can my duo-therm air conditioner on my rv be recharged?

These unit can be recharged. 134A. You NEED A SERVICE TECH THAT KNOWS HOW TO CHARGE UNIT.RUS

Posted on Jun 25, 2009

  • 127 Answers

SOURCE: My RV rooftop air conditioner fan has seized up

Whether to replace the entire unit or repair it is a tough decision. If the unit is not very old and was working fine before the fan motor froze up, then I do not think that it is necessary for the entire unit to be replaced. With a new unit of course comes the new warranty.

It is not difficult at all to replace the upper unit of the air conditioner. What you have to look for and make sure of is that the ceiling pack or Air Distribution Box (inside unit of AC) that you currently have is compatible with the new Upper Units. Get the part number off of the inner unit and make sure that it is compatible with the part number of the new upper.

Again, it is much less expensive to replace the fan motor than the entire unit (especially Dometic). You could replace the fan motor and get another 10 years out of the AC or, you could replace it and only get 1 year out of it. That is your call.

Just a word of precaution. Dometic Air Conditioners are very hard to find right now due to an industrial accident that occurred at the AC plant. Most distributors and service centers are 6 to 8 weeks out on getting a Dometic AC in stock. That is something else to think about.

Hope this helps,

Jeff

Posted on Jul 06, 2009

  • 534 Answers

SOURCE: DUO THERM 590 QUICK COOL AIR CONDITIONER PART NEEDED INTAKE GRILL

you could contact the manufacturer of the rv and they can help you with you search. Hope this helps

Dave

Posted on Jul 16, 2009

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It sounds as though your outside motor has failed. If you have a long shafted screwdriver, you can attempt to spin the motor to see if the motor has seized up. Caution should be used as the motor may start if the unit is calling for cooling when you attempt this. If you can manually start the motor, then chances are the capacitor has failed.

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My RV rooftop air conditioner fan has seized up


Whether to replace the entire unit or repair it is a tough decision. If the unit is not very old and was working fine before the fan motor froze up, then I do not think that it is necessary for the entire unit to be replaced. With a new unit of course comes the new warranty.

It is not difficult at all to replace the upper unit of the air conditioner. What you have to look for and make sure of is that the ceiling pack or Air Distribution Box (inside unit of AC) that you currently have is compatible with the new Upper Units. Get the part number off of the inner unit and make sure that it is compatible with the part number of the new upper.

Again, it is much less expensive to replace the fan motor than the entire unit (especially Dometic). You could replace the fan motor and get another 10 years out of the AC or, you could replace it and only get 1 year out of it. That is your call.

Just a word of precaution. Dometic Air Conditioners are very hard to find right now due to an industrial accident that occurred at the AC plant. Most distributors and service centers are 6 to 8 weeks out on getting a Dometic AC in stock. That is something else to think about.

Hope this helps,

Jeff

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