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Old 04-24-2019, 04:00 PM   #1
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Old AC condenser "clicks" but isnt turning on (pics)


I ran power to it. First time its had power in 2+ years. When I switch thermo to cool, I hear it make some sort of clicking noise outside. I check power and when I touch both black and reds my "120" & "240" both illuminate on my tester. No idea if thats relevant. Seems odd both light up. At the box my red & black are my current & white in neutral. I bought 10/3 on accident and installed a ground anyways and capped it in the j-box. The old line coming from the condenser had only a black, red & white. But maybe that it clicks is a decent sign for a 16yr old condenser that hasnt ran in 2-3 years.








Last edited by friesbruh; 04-24-2019 at 04:16 PM.
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Old 04-24-2019, 04:55 PM   #2
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Re: Old AC condenser "clicks" but isnt turning on (pics)


Any idea what that plastic sheathing is for ? You will need to have a voltmeter to troubleshoot this.
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Old 04-24-2019, 05:14 PM   #3
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Re: Old AC condenser "clicks" but isnt turning on (pics)


Looks like it got a little warm. Disconnect needs to be replaced at the least.

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Old 04-24-2019, 05:27 PM   #4
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Re: Old AC condenser "clicks" but isnt turning on (pics)


That disconnect is junk. Got way too hot at one time.
Need an actual meter to go through everything.
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Old 04-24-2019, 07:18 PM   #5
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Re: Old AC condenser "clicks" but isnt turning on (pics)


"At the box my red & black are my current & white in neutral"

What the hell does this mean?

There should be no neutral feeding that thing. You should have a ground and 2 110V hots, which is another way to describe 230V.

This looks to be what you have here. The black and red wires go from the 2 pole breaker to the tops of those fuses, and the white and black wires go from the bottoms of the fuses to your air conditioner condensing unit. That white wire shouldn't be white because it's not a neutral, but whatever.

I don't know what kind of tester you have, but if you can test each wire to confirm voltage that would be a good thing. If the wires going to the top of the fuses have power going to them while the ones on the bottom of the fuses don't then you have a blown fuse.

When fuses blow there is usually a good reason. Please be careful. Besides your apparent lack of electrical understanding, that disconnect does look to be messed up. The potential to hurt yourself or create larger issues is there.
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Old 04-24-2019, 07:57 PM   #6
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Re: Old AC condenser "clicks" but isnt turning on (pics)


Quote:
Originally Posted by Wilbits View Post
Any idea what that plastic sheathing is for ? You will need to have a voltmeter to troubleshoot this.
I do not.

Quote:
Originally Posted by spitz1234 View Post
Looks like it got a little warm. Disconnect needs to be replaced at the least.

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Noted.

Quote:
Originally Posted by roughneck View Post
That disconnect is junk. Got way too hot at one time.
Need an actual meter to go through everything.
Noted.

Quote:
Originally Posted by bfrabel View Post
"At the box my red & black are my current & white in neutral"

What the hell does this mean?

There should be no neutral feeding that thing. You should have a ground and 2 110V hots, which is another way to describe 230V.

This looks to be what you have here. The black and red wires go from the 2 pole breaker to the tops of those fuses, and the white and black wires go from the bottoms of the fuses to your air conditioner condensing unit. That white wire shouldn't be white because it's not a neutral, but whatever.

I don't know what kind of tester you have, but if you can test each wire to confirm voltage that would be a good thing. If the wires going to the top of the fuses have power going to them while the ones on the bottom of the fuses don't then you have a blown fuse.

When fuses blow there is usually a good reason. Please be careful. Besides your apparent lack of electrical understanding, that disconnect does look to be messed up. The potential to hurt yourself or create larger issues is there.
You sound like a complete psycho. Input disregarded.

Last edited by friesbruh; 04-24-2019 at 08:01 PM.
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Old 04-24-2019, 08:03 PM   #7
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Re: Old AC condenser "clicks" but isnt turning on (pics)


The click you hear is most likely the low voltage energizing the contactor coil and pulling the contacts in. I assume you have the "pull" from the dissconnect.

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Old 04-24-2019, 08:09 PM   #8
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Re: Old AC condenser "clicks" but isnt turning on (pics)


You need to see if the contactor is getting 240v +/- 30 with a multi-meter.

Basic multi-meters are pretty cheap and it's as important to have one as it is a screw-driver for this type of work. If you can afford though get a clamp style meter that can check capacitance and amp draw.

If the contactor isn't getting power, you have to work backwards to see where the power is being interrupted.

bfrabel's post has good info but he was rude.

The white isn't a neutral, you can't always go by colors. There is no neutral in straight 240v circuits.

Only 240v circuits serving stoves and sometimes driers have neutral to drive the 120v components. (for example, many electric stoves have a regular plug, oven light)
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Last edited by user_12345a; 04-24-2019 at 08:20 PM.
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Old 04-24-2019, 08:10 PM   #9
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What? Please let me know which parts of my post sound psycho to you.

I was trying to help. Everything I was trying to say was true.

Seriously, which parts do you have issues with?

By the way I want to add that as others have said, the clicking is probably the contactor pulling in. This contactor is powered by 24v coming from the thermostat wire. Even if you have the main power shut off to the condensing unit, the contactor can still pull in and out if it's getting power sent to it from the thermostat.

You'll probably want to disregard that psycho little tidbit too though.

Good luck.

Last edited by bfrabel; 04-24-2019 at 08:25 PM.
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Old 04-24-2019, 09:06 PM   #10
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Re: Old AC condenser "clicks" but isnt turning on (pics)


That disconnect box has to be replaced. That particular style, we replace those a lot. The plug canít even fit in there properly. Also fuse looks bad on the right. Spend a couple dollars more and you will save in the long run. I canít tell you how many of that type box we have replaced, but itís a lot of them.
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Old 04-24-2019, 09:23 PM   #11
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Re: Old AC condenser "clicks" but isnt turning on (pics)


Quote:
Originally Posted by spitz1234 View Post
The click you hear is most likely the low voltage energizing the contactor coil and pulling the contacts in. I assume you have the "pull" from the dissconnect.

Sent from my SM-G960U using Tapatalk
Trying to decipher.

Quote:
Originally Posted by user_12345a View Post
You need to see if the contactor is getting 240v +/- 30 with a multi-meter.

Basic multi-meters are pretty cheap and it's as important to have one as it is a screw-driver for this type of work. If you can afford though get a clamp style meter that can check capacitance and amp draw.

If the contactor isn't getting power, you have to work backwards to see where the power is being interrupted.

bfrabel's post has good info but he was rude.

The white isn't a neutral, you can't always go by colors. There is no neutral in straight 240v circuits.

Only 240v circuits serving stoves and sometimes driers have neutral to drive the 120v components. (for example, many electric stoves have a regular plug, oven light)
Ill get a MM tomorrow and follow your steps.

Quote:
Originally Posted by BayouRunner View Post
That disconnect box has to be replaced. That particular style, we replace those a lot. The plug canít even fit in there properly. Also fuse looks bad on the right. Spend a couple dollars more and you will save in the long run. I canít tell you how many of that type box we have replaced, but itís a lot of them.
Is this sufficient or just like the last one

https://www.homedepot.com/p/GE-30-Am...0RCP/100576894
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Old 04-24-2019, 09:41 PM   #12
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Re: Old AC condenser "clicks" but isnt turning on (pics)


Quote:
Originally Posted by spitz1234 View Post
The click you hear is most likely the low voltage energizing the contactor coil and pulling the contacts in. I assume you have the "pull" from the dissconnect.

Sent from my SM-G960U using Tapatalk
Trying to decipher.

Quote:
Originally Posted by user_12345a View Post
You need to see if the contactor is getting 240v +/- 30 with a multi-meter.

Basic multi-meters are pretty cheap and it's as important to have one as it is a screw-driver for this type of work. If you can afford though get a clamp style meter that can check capacitance and amp draw.

If the contactor isn't getting power, you have to work backwards to see where the power is being interrupted.

bfrabel's post has good info but he was rude.

The white isn't a neutral, you can't always go by colors. There is no neutral in straight 240v circuits.

Only 240v circuits serving stoves and sometimes driers have neutral to drive the 120v components. (for example, many electric stoves have a regular plug, oven light)
Ill get a MM tomorrow and follow your steps.

Quote:
Originally Posted by BayouRunner View Post
That disconnect box has to be replaced. That particular style, we replace those a lot. The plug canít even fit in there properly. Also fuse looks bad on the right. Spend a couple dollars more and you will save in the long run. I canít tell you how many of that type box we have replaced, but itís a lot of them.
Is this sufficient or just like the last one

https://www.homedepot.com/p/GE-30-Am...0RCP/100576894
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Old 04-24-2019, 09:47 PM   #13
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Re: Old AC condenser "clicks" but isnt turning on (pics)


If you have 10gauge wire on a 30amp breaker a non fused disconnect will do.

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Old 04-25-2019, 09:31 AM   #14
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Re: Old AC condenser "clicks" but isnt turning on (pics)


The one you posted is low quality like the other. Look further


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