AC Contactor Troubleshooting and Replacement

Working on a split system AC unit with a 24v single pole contactor on a 240v condenser (residential)

[andrewbrock]

I became the lead at my property this year. In the past we've always had at least 1 other experienced maintenance person to help brainstorm different issues or just offer a simple answer when I'm over-complicating an issue. I don't have that anymore. Your videos have been that extra voice for me and I appreciate it. Even basic stuff like this can help. Sometimes I just know by behavior and past experience to replace a certain part but it's nice to get more in-depth tutorials about why. I'm getting more sharp and accurate with diagnosis with your vids and some of the comments from viewers 👌

[dj]

No fluff straight clear explanation. Good video. Thanks.

[TheKillae]

this was actually good to watch because we see it everyday on maintenances. so yeeeaahhhh!!! woooo!!!

[rightlydivided]

Hey man been watching your vids...new to apt maintenance and I got hired despite not being hvac certified. Rewarded my boss by getting certified but still need to learn a lot. I appreciate all your vids being new to the industry and hvac so Thank you.

[jgmatp]

If you're a homeowner and want to, and the coil still works, you can take these contactors apart and sand a shiny new flat surface on the contacts with about a 600 grit sandpaper on a flat table. works great. just like new. reduce, reuse, recycle, and save money too.

[EdBerman-beqo]

Dave, thanks for this video! Couldn't be any more clear and simple!

[lcagee]

I have a outside condensing unit where the fan is not running. When i push the plunger to the contactor in, everything seems to run normally. Ive replaced the capacitor. Aside from a bad contactor, are there other possible reasons for this, for example, low freon?

[fikrihomeremodel]

Thanks for video. By the way contactor doesn’t has mark L1 & L2 T1 & T2 is’t doesn’t matter opposite directions.

[robertweller]

Great video. I'm having a contactor issue now. So I'll replace the contactor. Hopefully this will work?

[MikeJ-cb]

Excellent video. You got yourself another follower sir!

[richlikeg]

I was wondering why some units have a single pole and double pole. I have a crankcase heater for my unit but it comes with a double pole from factory though.

[xxhorrorpunkxx]

L2 to T2 measured 217v. You said it's a bad contactor. But then text appears on screen saying the opposite, that L2 and T2 should be connected when contactor coil energized. What am I misunderstanding please? Aren't they connected when they read 217v? Did you mean to say, "shouldn't"? Thank you.

[Keith]

so if the two 24volt wires from the contactor touch each other, will that blow the transformer? I'm having an issue with blown transformers

[topher]

It seems I always remember the crankcase heater being fed in the contactor line side. I always thought manufacturers used the single pole contactor to cut manufacturing costs.

[Lucas-vill]

Why the one of the lines still have power if the disconnect got unplugged?

[MatthewHarper-jzxs]

Question from a homeowner. My carrier infinity AC keeps giving me an error “74 - No 230V to compressor”. It happens irregularly. Some days it will work all day, others it will give me this error and not cool. After researching it seems it may be the contactor. Would a contactor fault irregularly like that?

[Lensman]

4:08 Take note of that 1:1 replacement. It'll save you a lot of headaches if your a DIYer!

[el.handyman]

I replaced the contactor because it was stuck in the closed position, plus the contacts were badly pitted. New contact is also stuck in the closed position... I don't see markings to identify T1, L1, or T2, L2...? Could I have it upside down?

[mammar]

what if the condensor fan starts but not the compressor what could be the problem?

[leealtmansr.]

Nice video. Only you did not torque the lugs to the proper in/lb settings. That information is on the contactor. (25 in/lb for screws, 40 in/lb for lugs, most often).