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re: My a/c condenser fan isn't turning. Bad motor or capacitor likely?

Posted on 6/24/15 at 9:14 am to
Posted by cave canem
pullarius dominus
Member since Oct 2012
12186 posts
Posted on 6/24/15 at 9:14 am to
quote:

Nothing is starting. Not even the fan on the blower in the attic.


Check the thermostat again. nothing you did replacing a capacitor should effect the blower motor. Either the thermostat is not engaged, a breaker is tripped, or somthing was unplugged or misplugged inadvertantly.

you should have A: a service diconect B: most likely double 240v breaker for the compressor/fan C: A 120V breaker for the thermostat and blower.

Make sure these are all good
Posted by LSUSUPERSTAR
TX
Member since Jan 2005
17106 posts
Posted on 6/24/15 at 9:19 am to
I think I found the problem. There is a connector that looks faulted out. When I press the middle in, everything turns on. But it won't stay in. Trying to upload a picture.
Posted by Bullfrog
Running Through the Wet Grass
Member since Jul 2010
61835 posts
Posted on 6/24/15 at 9:21 am to
quote:

cycles on about every 10 minutes or so, the noise is absurdly loud. it sounded fine about 4 months ago, then it got kin
Not an expert but I'd say your fan is about to fail. Bearings prolly about shot.
Posted by cave canem
pullarius dominus
Member since Oct 2012
12186 posts
Posted on 6/24/15 at 9:22 am to
quote:

I think I found the problem. There is a connector that looks faulted out. When I press the middle in, everything turns on. But it won't stay in. Trying to upload a picture.


sounds like you found it
Posted by Napoleon
Kenna
Member since Dec 2007
74922 posts
Posted on 6/24/15 at 9:22 am to
If you can manually start it, it's likely a bad capacitor. If the fan motor can't be manually started it's likely the fan.

IMO buy the capacitor first (like $10) then if tht doesn't work, get the fan motor.
Posted by LSUSUPERSTAR
TX
Member since Jan 2005
17106 posts
Posted on 6/24/15 at 9:24 am to
Posted by Napoleon
Kenna
Member since Dec 2007
74922 posts
Posted on 6/24/15 at 9:24 am to
quote:

I think I found the problem. There is a connector that looks faulted out. When I press the middle in, everything turns on. But it won't stay in. Trying to upload a picture.




The relay, that will only set you back like $15. If you can "push" yours in, you have the old style, the new ones are sealed.

You need to paya ttention to the relay voltage (usually 24v ac) and then the amperage, and of course how many poles it has.

So it should be a 2-pole, 24v 30 amp most likely, but bring the old one in. Very simple change out.

Posted by LSUSUPERSTAR
TX
Member since Jan 2005
17106 posts
Posted on 6/24/15 at 9:25 am to
What is that thing called? The middle button seems like a GFCI button, but won't stay engaged on it's own.
Posted by Napoleon
Kenna
Member since Dec 2007
74922 posts
Posted on 6/24/15 at 9:26 am to
That's a 2-pole 40 amp 24v switch

Are you in Baton Rouge? They have them at Ideal appliance for $15-20


Posted by LSUSUPERSTAR
TX
Member since Jan 2005
17106 posts
Posted on 6/24/15 at 9:27 am to
I'm in Arlington, TX. What type of place should carry it?
This post was edited on 6/24/15 at 9:28 am
Posted by Napoleon
Kenna
Member since Dec 2007
74922 posts
Posted on 6/24/15 at 9:28 am to
It's a "pole contactor" to be specific.

I call it a relay, because it is a relay. It gets 24 v from the thermostat and then closes the switch. It gets the 24v cut and it opens the switch.

You may want to find out if you are getting the 24v input before changing the switch.
If you do not have a multimeter, have someone inside turn the A/c on while you stare at the switch, if you do not hear anything then you are probably not getting the 24v.



This post was edited on 6/24/15 at 9:34 am
Posted by Napoleon
Kenna
Member since Dec 2007
74922 posts
Posted on 6/24/15 at 9:29 am to
There is a Servall on 2200 Carson St.

Let me see if they have your part in stock.

Posted by absolute692
US of A, MFer
Member since Feb 2007
4004 posts
Posted on 6/24/15 at 9:30 am to
quote:

I'm in Arlington, TX.


Yikes. I've been in FW one summer with no AC, that's not fun.
Posted by Napoleon
Kenna
Member since Dec 2007
74922 posts
Posted on 6/24/15 at 9:31 am to
They have it there.

DP40242 is the part number you want (generic replacement, same thing as the one you have but sealed)

It's $18

Posted by LSUSUPERSTAR
TX
Member since Jan 2005
17106 posts
Posted on 6/24/15 at 9:33 am to
Should I take the old one off first and bring it with me?
Posted by Bullfrog
Running Through the Wet Grass
Member since Jul 2010
61835 posts
Posted on 6/24/15 at 9:34 am to
Always bring in the old one.
Posted by Napoleon
Kenna
Member since Dec 2007
74922 posts
Posted on 6/24/15 at 9:35 am to

If you want. Just to make sure, but your picture was clear enough that I could see it had two poles, that is said 24v and 40amps.

It's basically universal as long as it meets the main three requirements (amount of poles, relay voltage and amperage)

Posted by Napoleon
Kenna
Member since Dec 2007
74922 posts
Posted on 6/24/15 at 9:37 am to
BEFORE ANYHING. I would check to see that your thermostat is sending the 24v. It would suck to change the contactor and then find out you still need to change the thermostat.

(though of the two the contactor is most likely the culprit)
Posted by cave canem
pullarius dominus
Member since Oct 2012
12186 posts
Posted on 6/24/15 at 9:37 am to
If you own a multimeter I would verify that it is getting 24V before I removed it and drove to buy another one. JMHO
Posted by LSUSUPERSTAR
TX
Member since Jan 2005
17106 posts
Posted on 6/24/15 at 9:39 am to
I have a multimeter, how do I check it?
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