Dutherm AC issue

[Hslag]

My AC runs for about 5 minutes maybe 10 and the fan quits blowing there is still noise from the front of the unit vibrating humming noise I reached up and turned the fan and it moves freely can not turn fan on when this happens if it sets for 5 our 10 minutes will come back on any help please

[Hslag]

Put new blower assembly in it and all seems ok. Thanks for the help

[Ivylog]

I thought I had a bad fan motor too but it was dragging one of the squirrel cages and by raising that end of the motor mount up I was able to fix my problem without replacing the fan. I could not hear the fan dragging and it was only by comparing how well it spun compared to another unit that I found the problem. I would shim one end of the fan motor up at a time and spin it to see if it spends longer than before before replacing the motor. By spinning the fan shaft with your fingers it should keep turning for close to 10 seconds. This was on a 04 Dometic heat pump.

[Hslag]

Thanks

[j-d]

Our Coleman Mach uses a double-ended motor. Longer shaft to the "outdoor" condenser fan and shorter end to the "indoor" squirrel cage. We found one for just over $100 on Amazon. Searching "Dometic Fan Motor" on Amazon netted a couple hits. One looks a lot like the Coleman

and

Of course you'd need to start out with Model Number, Parts List, Part Number...

[Hslag]

Best I can tell uses 1 fan motor 1 fan each side of motor

[Hslag]

Looks like 1 fan blades on each side of motor have not taken motor off yet have to locate one first.

[j-d]

Well, if the compressor runs, you didn't reverse the Compressor Cap with the Fan Cap. Sounds like Motor Time...
Does your Dometic use one Fan Motor or Two?

[Hslag]

Both capacitor was replace already

[Ivylog]

OP, what capacitor did you replace to get it to run in your first post on the forums? If just the big one, I'd try replacing the smaller one too before putting in a new fan motor.

[j-d]

If you have a way to test (or substitute) the FAN RUN capacitor please do. My guess is that it's passably OK since the fan starts, but I do know that if it's of the wrong MFD, uF, MicroFarad capacity, one outcome can be an overheating motor.
Chances are, motor shot. Some replacements come with a new capacitor, others don't. With your motor's history, I'd suggest a new capacitor even if you need to buy it separately.

[Hslag]

Ok looked at it today when it quits the compressor will still be running but no blower. The blower motor is REAL hot as if I drop water on it it sizzles suspect blower motor needs replace

[Vulcan_Rider]

Hslag wrote:
The fan just quits. Where would the thermo load switch be?

Inside the fan.....or in a little "bump" where the wires come into it.

If the fan is getting power but is not turning.....then it's probably time for a new fan. Even if it has thermal overload protection, that part might not be available by itself.

[Hslag]

The fan just quits. Where would the thermo load switch be?

[Vulcan_Rider]

Sounds to me like there might be a thermal overload protection "switch" on the fan itself that it tripping.....and resetting when it cools down.

If the fan motor housing does not feel hot, the protection switch itself might be bad.