Question about Dometic Rooftop RV Air Conditioner

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Fan is slow

The fan speed on my ducted evap cooler is low. it is a good speed when it is on econ boost. it uses to be better without econ boost last year. we had a tec out to fix another problem last year and he set the remote different and when turning it on this year the fan speed is slow even ou high. but is good on eco boost. I dont know if its good to run the unit on eco boost all the time? product # 6050036GYE bONAIREmodel vsm60/65

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I have the same problem. You turn it on and the air speed is very low. Increasing the fan speed on the remote doesn't have any effect except when it's on boost, in which case it blasts out. Either too much or too little. Is it a remote problem?

Posted on Dec 13, 2012

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I dont have a solution, but I have a similar problem with a Bonaire evap rooftop cooler which only started after a tech came to look at the unit when it stopped operating properly last summer. He said it uses less water now, but the issue is that it doesnt cool any where near as effectively with the fan speed so low. I am located in Melb Australia, and wonder if you are in the same area. I am going to call service AGAIN & get the minimum fan speed returned to what it was previously. I wonder if my original unit is too small for the house - but nevertheless, it used to work beautifully and now is a very poor example of evap cooling. The service guy said the base fan speed could be altered from the controller, but we dont know how to get into the setup menu.

Posted on Nov 11, 2009

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1 Answer

High low fan motor


Your main concern is the temperature difference across the indoor coil for both heating and cooling. When you turn your thermostat from auto to on, you are on high speed.

If you have long duct runs and little return air registers then high speed
would help cool the house better. However in the heating mode, you
could lose up to 10degrees by having the high speed setting.

What they installed is sized for your house and the speeds should not have to be changed unless the ductwork is not sized right for the house.
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Heating should be Low-Red Wire.

400cfm equals a ton of cooling= 1200 sq. foot, For cooling you need
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