AC Wont Turn On - The Most Common Fix

hey guys and welcome back to a word of

advice to be where your time is invested

and not wasted today I want to show you

the most common reason why an air

conditioner does not turn on the unit

outside I mean a lot of times you'll

come outside and you'll hear it bugs and

like it's trying to start not starting

this is actually the most common thing

and I'll show you quickly how you can

fix this yourself so what you will need

is either a nut driver 5/16 or a quarter

inch or maybe a Phillips that holds in

the screws I mean to take out the screws

that hold the door in my case I have to

take this panel off if you're not sure

what to take off just follow the

electric whip here's your disconnect

from the air conditioner where the wires

come in I can see that mine comes in


which means all my electrical components

will either be here or here so just kind

of follow where this thing goes and your

electrical stuff should be somewhere

there I know mines here so I'll be

taking this door off I'll need 5/16 I

have a lot of screws so I'm going to

cheat and just use a drill with the 5/16

bit I also you might need some

needlenose pliers that will be helpful

and if you have an electrical meter I

will show you how to check that

component as well ok so to begin with

the very first thing you do is open up

your disconnect box and sometimes it'll

be a breaker sometimes it'll be a plug

like this you just yank this out and

that disconnects to 220 volts going to

the air conditioner just put that on top

for now then you take the door off



and I just want to use this opportunity

to show off my super cool tool I got 75

degrees but this was super awesome I

think everybody should own one there's

this pipe in front of here I can't use a

screwdriver I mean a nut driver or my

drill to get in there but with this

thing check this out the outside doesn't

spend only the inside I am super awesome

okay so I got all the screws out you

take the door off

and of course there's more screws think

these all quick to try not to lose any

screws take that off and voila

a lot of times there will be a lot of

dust and crap in here if you have a

brush you can just brush it off quick so

it's not as nasty to work on if you get

unlucky you'll have a nice mess in here

on all your wires are chewed up and

stuff if you're comfortable you can try

to fix the wiring yourself if not well

then you're gonna have to hire or find

somebody that is comfortable doing it

okay so the most common reason why a CS

go out is because this capacitor is

either really weak or has failed

altogether it's usually a greater silver

cylinder like this this is a start

capacitor this thing rarely goes up so

don't pay attention to that you're only

looking for the silver one so once again

you'll need a either a 5/16 or a

quarter-inch to get in there and loosen

up the bracket that's holding it and in

fact before you loosen up the bracket

this is why we have the needlenose this

thing stores a charge so if you start

touching it with your finger it might

zap you a little bit so I like to just

take the metal part of either my

screwdriver or my needlenose and just

discharge any charge that's left in

there and we have the power disconnected

remember also just so you're aware we

have the 220 disconnected but if your

thermostat is still calling for cool

you're going to have 24 volts on this

contactor on either end right here so if

you touch something metal to it it will

pop a fuse inside your furnace so either

turn your thermostat off or don't touch

anything here anyways we'll pull off all

the wires here and they are all labeled

actually we'll leave them on for now

I'll show you how to read the labels on

there so you take off the screw that's

holding it a lot of times I don't take

it off all the way I just loosen it up

and this should slide out like that

and as you can see right here it says

fan then see for common and then you got

and you got home for compressor take

note or even take a picture where each

wire goes I know which color goes to

which which terminal here because you

don't want to plug them in wrong when

you're plugging everything back together

next thing you do is you look for the UF

rating that's going to be the micro

farad reading and it'll tell you what

size or what rating this is this one is

a 35 plus 4 which means the capacitor is

35 micro farad and the fan is always a

smaller one that's going to be the 4

micro farad then you order one from

Amazon or your local appliance shop you

go and buy it the same size here and you

replace this thing and your AC should

start working a lot of times if this

failed this will be bubbled up instead

of being flushed like it is here it will

be bubbled up or in the worst case

scenario the whole thing literally pops

off and you have dielectric grease all

over the place that kind of stinks but

you clean that up and get that done so

you unplug all the wires making sure you

note where did coming from you put the

new one in plug all the wires back on

and you slide the new capacitor back in

by the way a new capacitor like this

will probably be skinnier and it doesn't

matter it's the same thing as long as

it's the right rating in that case you

would just either zip tie it or tape it

or you can just take and bend this

bracket so it holds the new capacitor in

there well and I forgot to show you but

I was going to show you how to measure

this if you have electric meter so

orange is firm I've done this a bunch of

times so I don't need to mark them down

so let's just disconnect all this

okay I just want to show you quick how

to check it if you have a meter so you

set this down remember it was rated at

thirty five four so you got your meter

you're going to set it to micro farad's

MFD or it's going to be that upside down

you app just like on the capacitor

please set it there when you plug your

leads in okay and then to check the fan

you would go from fan to common stick it

into the leads anywhere just as long as

you have a good connection there I'll

hold it like that so right now we're

checking the fan and the fan is supposed

to be four and look at that it's right

at four perfect and if usually put the

bad it's going to be like two one or

zero all together and then to check the

compressor which is harm you go from

common to herm plug it in there and this

one should be I believe it was thirty

five and look at that right on the money

it's thirty five point zero nine and if

it's bad usually this one doesn't say

but some of them will say plus or minus

six percent so it can only be outside of

the range by six to ten percent which

would be like I don't know a minimum

this has to be thirty three and a lot of

times if these are bad it's going to be

more like twenty five twenty two or zero

all together because it's blown up so

there you have it if you replace this

thing that will get your air conditioner

started back up and like I said this is

the most common fix when you plug

everything back in remember we said

orange was harmed so put orange in there

Brown is almost always the fan

when everything else pretty much goes to

common okay

don't forget to tighten up the screw

that you loosen then you put everything

back together so there you have it if

you're outside units not turning out but

the insides working changing the

capacitor pretty much like 80% of our


it's the capacitors and then you just

turn the power back on

but plugging the plug in just so you

know it might spark a little bit just

because you're making the contacts again

don't be too startled also if you have a

saver switch which is from the

electrical company this thing whenever

you disconnect power and connect it back

on this thing will delay the start of

the air conditioner anywhere from 5 to

15 minutes and I'll usually a red light

will pop out so you just wait until that

delays over and it should fire it up

that is all I had for you today and a

question to the audience have you ever

had an air conditioner problem that you

were able to fix yourself we would love

to hear about it in the comments below

maybe you'll save somebody else's day as

well thank you so much for watching

until next time