Hard Start Kit Amana RCB302A
Posted 11 August 2011 - 01:31 AM
Today our A/C didn't work... on it's own. I noticed the outside fan wasn't working. We cooled it down, I had someone turn it on inside and I used a long stick to spin the fan and it started working. Of Course. when we finally cooled down inside and the unit shut off the fan wouldn't start on it's own.... I spun it again and it worked.
I am guessing this may be a capacitor issue??? I have no idea... Also, I don't have a tester that measures MFD, just a nice GREENLEE CM-450 digital clamp-on meter.
What should I test and how given the tools I have? Any help or advice?
Thanks in advance!
Posted 11 August 2011 - 06:25 AM
First turn off 220 volt power to the condenser.
To test the capacitor, set your meter to OHMs .
If you have a single capacitor with just 2 wires on it , remove one wire from the capacitor OR If you have a duel capacitor (it will have 3 terminals) remove the wire going to the "fan" terminal on the capcitor.( it will be the terminal with only one wire on it (brown in most cases)
Now put your meter leads on the 2 connectors of the capacitor or for a duel capacitor between "fan" and "common"
Here is what a good capacitor will read. The reading will be really high and constantly changing. you will see the numbers going in one direction and if you keep your probes on long enough , the whole thing will reverse and the numbers will start ticking the opposite direction.
If you get nothing . you have a bad capacitor(or a meter that cant read resistance that high. From the specs I see on your meter it should read ok.)
Oh and of course there is the visual test of the capacitor. Look at the top of the capacitor. It should be totally flat. if it bulging even a little bit , it is bad.
Posted 11 August 2011 - 09:20 AM
Click on pix to enlarge:
Edited by applianceman18007260692, 11 August 2011 - 09:21 AM.
-old Irish saying
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Posted 11 August 2011 - 12:32 PM
The problem is that the capacitor I dropped just has a paper label and I cannot make out any of the information on it.....
The dual capacitor info is:
610000AFC 890323 Bulge.jpg 81KB 7 downloads
Posted 11 August 2011 - 01:15 PM
Posted 11 August 2011 - 08:15 PM
It has no information on it at all. Can I replace it with another brand? On Grainger website they have http://www.grainger....PCY1?Pid=search which looks like mine and is also for the 2.5 ton like mine.
Can I just use the capacitor from the new kit? Do I have to change the relay?
Where can I buy it from? Grainger requires an account i believe...
Any help is appreciated....
Posted 11 August 2011 - 10:09 PM
Here is a quick google shopping result for 35/5 caps
THe start capacitor is more complicated. It would be a range of MFD's like 233-288 mfd .But it isalso important to get the right "physical size" capacitor. If you buy one rated for the correct MFD's and it is alot smaller than the one you have now(actual physical size) . It will explode upon startup.
Since you don't have the info from the label , I would suggest replacing the entire start kit for one that is rated for a 1 1/2 ton unit . This is the brand I suggest.
Here is another quick search for the 5-2-1 start kits
Posted 12 August 2011 - 11:16 PM
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