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Topic: Front A/C problem (Read 856 times) previous topic - next topic

Front A/C problem

Soooooo.... All you roof A/C gurus out there - A/C was replaced in 2010.

I know I need to replace the start capacitor because I have to assist the squirrel cage blower on the fan motor.  Where might I find this capacitor?  CSC 3100248.719  Have found them on ebay for about $30.00.

When assisted with a long blade screwdriver, the fan runs on both speeds and then the compressor comes on after about 2 mins.  At first it ran for about 5 mins then shut down.  After doing some research I decided that I should clean the coils.  Did that.  Started the A/C again and the compressor ran for about 20 mins and shut down with the fan still running.  Went up again and sprayed some more cleaner on the coils, let sit for about 10 mins, rinsed with water and turned it on again.  It's been running for about an hour now.  Did I fix it?

The motor shaft was also making some noise so I used some light oil and shot the areas near the bearings.  Noise now gone.

Attached is a pic of the product ID under the cover.

As always your thoughts are appreciated. 
Scott & Carol Seibert
2001 42' double slide U320 - Sold
Previous - 2002 36' U320

Re: Front A/C problem

Reply #1 –
Scott the capacitor will be under some kind of cover up on the top unit usually. Yours is showing a 45/15 which is a dual capacitor It has 2 sides built into 1 capacitor. It will have 3 terminals on top of it The 45mfd is the compressor side and the 15mfd is the fan side.
Here is what it looks like. You can source one of these at your local HVAC/Refrigeration supply house or WW Grainger in your town You don't necessarily have to buy from dometic . 45/15 370 volt is what you want.
Supco CD45+15X370 45/15 MFD 370 Volt Oval Dual Motor Run Capacitor | McCombs...
You can test the capacitor you have now plenty of videos on You Tube showing how. So you can be sure that is the problem.
91 GV U300 Unihome 40' Build 3811
6V92TA Detroit

Re: Front A/C problem

Reply #2 –
Does your fan motor have oil cups? Tiny 1/4" plastic plugs that say oil or 710. Typically located directly over the bearings.
Old Phart Phred, EIEIO
89 GV ored 36' #3405 300 hp cat 3208 ATAAC side radiator, mountain tamer exhaust brake

Re: Front A/C problem

Reply #3 –
Did not see any oil cups.  😃

Still running.  😀
Scott & Carol Seibert
2001 42' double slide U320 - Sold
Previous - 2002 36' U320

Re: Front A/C problem

Reply #4 –
Oil the motor. . .
 

Re: Front A/C problem

Reply #5 –
I did.
Scott & Carol Seibert
2001 42' double slide U320 - Sold
Previous - 2002 36' U320