Question about Dometic Rooftop RV Air Conditioner

1 Answer

RV AC blower fan turning very slowly

My RV's AC fan started acting like it was winding down when it was on, and eventually just stopped, making a humming noise. I opened up the vent and then the cover to the blower, and the blower is turning very slowly. I tried to give it a hand turning, but it was hard to turn it any faster than it was going. I'm not sure if this is the capacitor, or my blower motor. Thanks for any help you can give.

Posted by on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Guru:

    An expert who has written 7 tips or uploaded 3 video tips

  • Master
  • 415 Answers

It's the blower motor.........the bearings are seizing up when the motor is difficult to turn with power to it.
Generally, if the capacitor is bad, it won't turn at all or will quickly overheat and go out on internal overload.
If the motor feels "tight" when trying to spin it, the bearings are seizing and the motor will have to be replaced.
If there are oil ports, you might be able to spray some lubricant inside such as WD-40, but this does not always work and, if it does, it is only for a short time.....but it might get you by if you need the A/C and cannot get it repaired immediately.

I hope you find this information to be very helpful to you moving forward. :-)

Posted on May 04, 2010

Testimonial: "Thanks for the help. I'm going to have to buy another motor I suppose. Are they very hard to change out?"

  • laura Newman May 05, 2010

    The level of difficulty depends on upon your level of mechanical aptitude and abilities.

    Use Care when working with electricity. Make sure ALL power to the A/C is OFF.

    You can keep your screws seperated by using ziploc bags and marking the bags so everything goes back the same way.

    Before removing the fan blade or the mount from the old motor, take measurements of how far down the shaft the blade was located and how far from the end of the motor the mount was........this will ensure proper clearances for your new motor installation.

    Have Sandcloth and lubricant (WD-40, Liquidwrench, etc) handy......you want to sand to a shine and lubricate the shaft prior to attempting to remove the blade. Also have wire nuts, electrical tape, and wire ties handy.

    Replace the capacitor with a new capacitor. Don't use the old one.

    When you purchase your replacement motor, ask questions. The worse that can happen is the counterman will be uncooperative. The best that can happen is you can get some additional good, sound advice. :-) Good Luck in your endeavor!!!!!

×

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

AC blows cold air, fans stop blowing


I think you have a "variable speed resistor" problem, it's overheating. It's an electronic device usually located near or attached to the AC motor blower that controls the fan speed. This is a common problem with aging AC blowers with electronic controls.

Apr 13, 2014 | 2001 Pontiac Sunfire

1 Answer

My ac is acting funky. my ac will blow cold air as im moving. once i stop and idle for longer than 3 or 4 minutes, something will kick on and then it will start to blow hot air. as this happens, my car...


Start by checking to make sure that the a/c condensor and radiator is not full off debris. If the condensor and radiator were full of debris it will limit the air flow from the engine cooling fan which in tern will cause a high discharge pressure on the discharge on the a/c causing poor or no cooling at idle and could also cause vehicle to overheat. Check and make sure that the cooling fan as well as the condensor fan are coming on together when the a/c is turned on if equipped with 2 fans.

Sep 12, 2013 | 2004 Chevrolet Cavalier

2 Answers

My carrier ac roof top ducted unit started spitting out small amounts of water now and then, I changed filter. Now with ac in off position I am hearing a humming noise coming from the unit, what can this...


Don't really understand what you mean by roof top duct unit .if it's a roof top unit and water is leaking down your vent then you have a clogged drain line .

Mar 02, 2018 | Dometic Rooftop RV Air Conditioner

1 Answer

Duo therm quick cool ac


if you can spin blade freely by hand change capacitor.

May 21, 2013 | Dometic Rooftop RV Air Conditioner

3 Answers

Humming noise when turned on


The montherboard doesn't have anything that would make a humming noise. In all likelyhood it's the fan that sits on top of teh processor. It could be normal, but might need to be replaced or cleaned.

Mar 01, 2011 | Computers & Internet

2 Answers

The ac is not fully turning on. It sounds like the compressor starts to run, but the fan does not and eventually turn off. With the unit off, i turn the fan on and it sounds like its trying to run but its...


The first thing you should do is make sure the fan turns freely by hand. If it does then check the capacitor and replace it if it's bad. If the fan doesn't turn freely then you may need a new fan.

Aug 18, 2010 | Dometic Rooftop RV Air Conditioner

1 Answer

Suddenly making noise from above the refrigerator behind the vent


Almost certainly there is an ice build up which has eventually migrated to the fan blade. Do a 12 hour defrost to ensure a proper "defrost", then try again. Very possible the door was left open slightly by accident.

Jun 08, 2010 | Sub-Zero 695/O Side by Side Refrigerator

Not finding what you are looking for?
Dometic Rooftop RV Air Conditioner Logo

786 people viewed this question

Ask a Question

Usually answered in minutes!

Top Dometic Heating & Cooling Experts

Bill Long

Level 3 Expert

588 Answers

Tim Whalen

Level 3 Expert

3074 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17130 Answers

Are you a Dometic Heating and Cooling Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...