AC Compressor and fan stopped working

[Angler]

Both stopped working today, it is a Trane system about 15 years old. Power to and through the relay switch, red and blacks wires are 118v seen in the pic.

Any ideas?

 

[90 Laveycraft]

Do you mean compressor and fan?

 

[Angler]

yes

 

[Joe mama]

Okay I will bite, 240v between BLK and red at bottom of relay?

 

[90 Laveycraft]

Relay is a contactor...sorry..relay is top left

 

[Angler]

Okay I will bite, 240v between BLK and red at bottom of relay?

I would assume so, 120v on each leg, I'm using a little meter, doesn't measure 240v

 

[Flying_Lavey]

Well that relay is doing nothing anymore. It's for a hard start kit that looks like the cap went bad and was just pulled out instead of replaced.

Betcha you got a non-op fan motor so the compressor internal thermal overload tripped resulted in both not running. If not....

Check your run cap (big on is compressor and small is fan motor) between the C and HERM terminals for the compressor

Check your voltage between both legs of power

Check amp draw immediately after cycling power (see what the in-rush amps are)

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[Flying_Lavey]

I would assume so, 120v on each leg, I'm using a little meter, doesn't measure 240v

120 to ground correct?

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[90 Laveycraft]

Think FL is dead on...inop external fan motor/capacitor, compressor has a overload protector that opens when over heated..is compressor smoking hot?

 

[Angler]

120 to ground correct?

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yes.

The fan spins freely too.

 

[Joe mama]

If your getting 120 to ground on each leg and contractor is not pulled in that’s good. If contractor is pulled in one leg can feed through compressor to o5her leg.

 

[Angler]

Think FL is dead on...inop external fan motor/capacitor, compressor has a overload protector that opens when over heated..is compressor smoking hot?

wasn't here when it stopped working

 

[Flying_Lavey]

wasn't here when it stopped working

It resets and runs after it cools down. If the contactor is pulled in like that and it's burning hot, thermal overload and is a condensing fan issue (doesn't look like, and I doubt there is a fan cycle control in there).

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[90 Laveycraft]

wasn't here when it stopped working

Smoking hot to touch?

 

[Angler]

How do you test a capasitor?

Smoking hot to touch?

I was not home when it stopped working.

 

[90 Laveycraft]

how long has it been off, disabled,?

 

[Shlbyntro]

My guess would be the $500 capacitor if I had a hunch....

Home AC repair.

My home AC went out a few days ago so I called an ac company out to have it looked at. I'm sure I could've figured it out because I work on boat ACs but I'm busy and not too familiar with the home ac systems and just decided to let somebody handle it for me. Guy comes out today and tells me it...

www.riverdavesplace.com

 

[Angler]

how long has it been off, disabled,?

was running this morning at8, wasn't running at 4pm

 

[Flying_Lavey]

If your getting 120 to ground on each leg and contractor is not pulled in that’s good. If contractor is pulled in one leg can feed through compressor to o5her leg.

This is true. 120 on each leg is good but you need to make sure there is 240 to make sure there isn't any circuit issues. The compressor being super hot or not (like cannot keep your hand on top of it) would be the tell tale what the issue likely is.

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[90 Laveycraft]

My guess would be the $500 capacitor if I had a hunch....

Home AC repair.

My home AC went out a few days ago so I called an ac company out to have it looked at. I'm sure I could've figured it out because I work on boat ACs but I'm busy and not too familiar with the home ac systems and just decided to let somebody handle it for me. Guy comes out today and tells me it...

www.riverdavesplace.com

Lol

 

[Angler]

My guess would be the $500 capacitor if I had a hunch....

Home AC repair.

My home AC went out a few days ago so I called an ac company out to have it looked at. I'm sure I could've figured it out because I work on boat ACs but I'm busy and not too familiar with the home ac systems and just decided to let somebody handle it for me. Guy comes out today and tells me it...

www.riverdavesplace.com

the fan capacitor?

 

[90 Laveycraft]

the fan capacitor?

He's f'n with you...

 

[Angler]

Will the fan or compressor, start without each other?

 

[Angler]

He's f'n with you...

I seen that thread! funny

 

[90 Laveycraft]

Will the fan or compressor, start without each other?

Not on 15 year old Trane...if all is working correct..

 

[Shlbyntro]

the fan capacitor?

One in the same on my unit and yours. On mine, the fan leg of the capacitor went out and even though the compressor leg was still good, the compressor was going into overheat protection because the fan wasn't running.

 

[Flying_Lavey]

Will the fan or compressor, start without each other?

Not on 15 year old Trane...if all is working correct..

This.... And, the fan can continue to run without the compressor as long as the thermostat is calling for cooling (contactor pulled in indicates it is calling for cooling).

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[Angler]

One in the same on my unit and yours. On mine, the fan leg of the capacitor went out and even though the compressor leg was still good, the compressor was going into overheat protection because the fan wasn't running.

but will the compressor run without the fan if it is cooled down. Like I said, it's been for several hours.

 

[Flying_Lavey]

One in the same on my unit and yours. On mine, the fan leg of the capacitor went out and even though the compressor leg was still good, the compressor was going into overheat protection because the fan wasn't running.

Negative ghost rider. His fan run cap has already been changed. As well as the fan motor. It is the same run cap right next to the large combo cap.

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[Flying_Lavey]

but will the compressor run without the fan if it is cooled down. Like I said, it's been for several hours.

Read my posts. I've been a AC tech for 10 of the last 15 years in the trade. I'm walking you through how to diagnose it

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[Shlbyntro]

Negative ghost rider. His fan run cap has already been changed. As well as the fan motor. It is the same run cap right next to the large combo cap.

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My bad, didn't see that little tike down there, please disregard

 

[Angler]

Not on 15 year old Trane...if all is working correct..

it's a york, my mistake.

Negative ghost rider. His fan run cap has already been changed. As well as the fan motor. It is the same run cap right next to the large combo cap.

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Yes I changed the motor several years a go.

 

[Angler]

Flying_Lavey
Where should I go from here?

 

[90 Laveycraft]

You need a completely cooled down unit as your 110 meter aint gona get it.
Be at the unit after cool down..have someone start it, or push in the contactor and observe...does the compressor only start?
Do both start?

Thinking just call the guy!

 

[Angler]

If anyone is near San Dimas, come on by..

 

[90 Laveycraft]

Want a new one...I have 500 at work...

 

[SoCalDave]

My guess would be the $500 capacitor if I had a hunch....

Home AC repair.

My home AC went out a few days ago so I called an ac company out to have it looked at. I'm sure I could've figured it out because I work on boat ACs but I'm busy and not too familiar with the home ac systems and just decided to let somebody handle it for me. Guy comes out today and tells me it...

www.riverdavesplace.com

Was just waiting for that post...

 

[Angler]

it's a 5 ton. How much?

 

[Angler]

You need a completely cooled down unit as your 110 meter aint gona get it.
Be at the unit after cool down..have someone start it, or push in the contactor and observe...does the compressor only start?
Do both start?

Thinking just call the guy!

The compressor won't run.

 

[90 Laveycraft]

We can only sell to licensed ac contractors w/proper freon certs...
Price will vary dramatically, contractor to contractor.
Go with longevity in trade, reviews, get several bids for replacement.

 

[90 Laveycraft]

The compressor won't run.

AL 909 322-9923

It might after complete cool down...many hours

 

[90 Laveycraft]

It might after complete cool down...many hours

Trade trick is water hose, all power off!!!!
Call the guy!

 

[Flying_Lavey]

The compressor won't run.

AL 909 322-9923

Do you have a laser temp gun? If so, gun the top of the compressor and see what temperature it is. 90 Lavey is right, it can take several hours to cool down with no fan running.

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[Angler]

That has worked before, but it hasn't run in hours, nothing is hot.

 

[Flying_Lavey]

That has worked before, but it hasn't run in hours, nothing is hot.

If nothing is hot then you really need a 240v capable meter to diagnose further.

I'd also check the voltage across the contacts on each leg to make sure the contactor contacts are still good.

Assuming the contacts are still good, the compressor is likely bad from either a burnout or an open winding, likely caused by a failed condenser fan motor.

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[90 Laveycraft]

I would replace a 15 year old York(prob 10 -12 Seer), if compressor is out. If simple fix...run it!
Call the guy. Reputable company only....

 

[Havasu blue label]

what city

 

[90 Laveycraft]

what city

Post #35

 

[Havasu blue label]

Have a buddy that might help pm

 

[Angler]

I would replace a 15 year old York(prob 10 -12 Seer), if compressor is out. If simple fix...run it!
Call the guy. Reputable company only....

16 seer

Have a buddy that might help pm

I have someone coming out tomorrow. Thanks for all the help guys.

I run my AC from may till October and never turn it off. It works very hard to keep my house 70 degrees in the day and 68 at night.