Compressor Reaches 50psi and shuts off! HELLP!

by AL
(Dover, Delaware)

I have a Husky 26 Gal Air Compressor Model # WL660900(AJ)


It only fills to 50psi and shuts off.

Presssure will hold if not used. No Leaks
If used, pressure will drop as normal but tank will not kick back on.

Have to wait several minutes to get it back on and then it will refill back to 50psi and cut off again.

I have replaced the Valve kit which included (Vavle Plate, Intake valve, Exhaust valve, Exhaust valve gasket, Head Gasket, and Cylinder Gasket.

That did not resolve or make a difference.

I then ordered and replaced the Pressure switch, which included the Switch leaver and Unloader valve.

This did not resolve or make a difference either.

Whats left? Or what could be causing this issue.

It used to fill to around 120 or more psi and auto kick back on once drops down to a certain level.

If you need any further info, please let me know.

Thanks for any Help you can provide me!

AL

________________________
Bill says...

Al, under normal circumstances, it is the pressure switches role to either send power to the motor circuit, or cut that power off when the pressure in the system reaches the cut out pressure level.

You say the compressor is stopping at 50 PSI? Is the pressure switch tripping the compressor off, or is it the breaker that's popping off?

If it is the pressure switch that's tripping the compressor off at 50 PSI, then I have to think that either your new pressure switch is set up wrong with a too low cut off setting or it might be wired backwards.

Give me some feedback as a comment here, please.

Bill





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Apr 18, 2016
Finally a Husky fix
by: Bill

Captain Kirk, thank you for taking the time to provide this link helping folks with a valuable tip should their Husky compressor stop repeatedly with no real indication why.

Apr 15, 2016
finally a fix
by: Captain Kirk

I had the same problem and replaced the check valve and capacitors with no relief. I then found this video and it fixed my problem.

http://www.bing.com/videos/search?q=huskey+air+compressor+keeps+shutting+off&view=detail&mid=9AD8E2602140D81996CB9AD8E2602140D81996CB&FORM=VIRE

Oct 02, 2015
Compressor shuts off at 50 PSI
by: Bill

One thing that hasn't come up in this thread is the possibility of a failing run capacitor. If it is weakened, then the motor may not be able to run past 50 PSI before it overheats and shuts down on thermal.

By the same token, if the motor is overheated, or the start / run capacitor is not working properly, the compressor may not start, even with little pressure in the tank.

Oct 01, 2015
husky pos
by: k

I'm having the same problem. I'm beginning to think that maybe husky is a pos.

Aug 24, 2011
same problem
by: Anonymous

im having the same problems and dont know what to do... HELP!!!!

Jul 31, 2011
Amps
by: Anonymous

I will check that out....If it is pulling to many amps..whats the fix? new motor?

Thanks

_________________

Likely, or maybe a rebuild if that's less cost and you have a good shop around.

Jul 31, 2011
Load Test
by: Anonymous

How do you check the load? It maintains 115v to the motor from the switch constant until you turn the switch to the off position. Is there another step to check the load that you are referring to?

thanks much!

______________

You need to run the motor under load, and use an amp meter to see if it's pulling amps within specs. My guess is that, under load, it's pulling too many amps, and that's popping the breaker.


Jul 31, 2011
Reaches 50psi and shuts off
by: AL

Update...
I tested the switch with a meter. Had voltage after it cut off at 50psi

I replaced the check valve...still shuts off at 50
Thus far i have replaced
The switch, the check valve, the valve kit inside the compressor and the unloader valve.

All yielded no luch thus far.

____________________

If the breaker is tripping the power off, and it's not the pressure switch, then what is likely happening is the motor is pulling too much current and the supply circuit cannot handle that, meaning a load test on the machine is what is now a consideration.



Jul 21, 2011
..
by: Anonymous

Bill,
I disconnected the exhaust tube going into the tank from the compressor. The motor stays on. So... would the problem be the check valve that would cause it to shut off prematurely before reaching for psi?

________________

Possibly. By disconnecting the feed line from the pump to the tank, you are effectively removing almost all load from the motor.

If the breaker is tripping the power off, and it's not the pressure switch, then what is likely happening is the motor is pulling too much current and the supply circuit cannot handle that.

What does that could be the check valve (so do check it out) but I think it is more likely that it is the capacitor or motor that's the issue. Did you look to see if the pressure switch trips off at 50 PSI?


Jul 18, 2011
Compressor Reaches 50psi and shuts off
by: AL

Bill,

The compressor stops at 50psi everytime (new switch and old). How do i determine if the pressure switch is tripping it off or if its the breaker?
I almost would think its the breaker because when it cuts off at 50psi its almost like you have to wait for the breaker to reset for it start up again. Turning it off and on or unplugging doesnt speed it up. Its a set time i have to wait before it will come back on

But either way. Both switches yielded the same outcome. And i rewired it identical to how it was initially.

im open to try or replace whatever you feel could be the cause.

thanks much!

_______________________

Al, a couple of thoughts. If you have a multi-meter, check the power from the pressure switch to the motor after the compressor has shut off. If you have power to the motor still, then it isn't the pressure switch.

No multi-meter? Then (very carefully as the innards are live) pull the cover off the switch, drain the tank, close the drain, and start the compressor, watch the innards to see if anything happens when the compressor shuts off.



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Husky 70 G Compressor wants to stall

by Brian

Motor Specs

Motor Specs

Hello, I have a Husky brand compressor that has very few hours on it.

Recently after hooking it up in a new house, it started giving me this issue.

After started and it builds pressure to about 20 psi, it begins to stall. I noticed inside the back of the Emerson moter (picture attached)there is an armiture that slides back and forth along the shaft causing or in result to the stalling motor.

The oil in the compressor is fine and it doesn't seem to be overheating either. It just seems to slow way down and slowly chuggs along/at the same time the armiture in the motor slides back and forth. I have looked everywhere on the web to include your site and have not found a similar issue anyone is having. Please help me. Thanks you.

_______________________
Bill says....

I believe the armature you refer to, Brian, is the flywheel that toggles the motor from the start to the run windings.

It were my compressor, I would make sure that I was not using an extension cord, and I would also make sure I had clean power. See what else is pulling power from the same plug the compressor is plugged into, and shut those down. Any difference?

Cheers,

Bill

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Jul 12, 2011
Still scratching my head...
by: Brian

Bill,
I appreciate your speed in getting back to me! I checked the wiring and I do not have any extension cord. It is directly wired into the pannel with 10g wire and set on a 30 amp fuse. From the pannel to the compressor measures only 10 feet. The pannel has not exceeded it's ability and I was careful to try it after shutting off all large appliances in the house (W/H, A/C, Stove, etc). I put a meter on the wire as the pump was running and bogging, but found no fluxuation in electricity (I am definately not an electrician though). I did notice today that when I leaned against the compressor and mistakenly placed my finger over the pumps air intake, that it did not stall as it was doing just prior to that. Obviously plugging the air intake is not a solution, but I don't know if that tells us anything else about the possible problem? Any other thoughts?

________________

Hi there again. Nope, I'm no electrician either. I do my very best to not fry myself every time I mess with electricity.

I am thinking that you may have a run capacitor problem. As the load increases based on increasing pressure in the tank, some compressor motors require a boost to keep chugging along properly. If the capacitor is weak or failing, then it's not helping, and since the power supply through the plug cannot keep up, your motor isn't getting enough to work properly, and it starts to lug. Not good for the motor, so don't push it.

Might as well ask the shop to load test the motor too to be sure that it's not that.

That it happened after you moved may only be coincidence.

Good luck.

B.


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Won't restart at all

by RANDALL BRYAN
(Rhinelander, WI)

Husky 5 hp 22 gallon compressor. Working fine, I shut it off before it reached peak and it will not start or even hum. Only thing I tried so far is replacing the on/off switch because it felt spongy. NO idea what happened.

_____________________
Bill says...

Hi Randall. Unplug it, and dump all the air from the tank. Plug it in. If it starts, consider the UNLOADER VALVE.

If it does not, is power getting to the motor past the PRESSURE SWITCH when the tank pressure is zero and you plug it back in? You need to use a multi-meter to check this. The pressure switch turns the power on and off to the motor as the tank pressure cycles, and if the pressure switch is pooched, and no power gets to the motor, then your compressor cannot start.

Check this out, and post a comment here with results, K?

Cheers,

Bill

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Dec 30, 2011
Air Compressor getting power past the switch
by: Kevin

I have a Q26 by husky and I am getting power past the switch so I think the motor is out. What do you think about it.

Thanks

Kevin

____________________

Kevin, if you drain the tank to zero PSI, power up the compressor, and power is flowing past the pressure switch to the compressor motor, and absolutely nothing is happening, then I would suspect that your start capacitor has shorted out.

See the page on this site about checking the capacitor for more info.

Cheers,

Bill


Jul 11, 2011
FIXED!
by: Randall Bryan

You're awesome! I checked the pressure switch with the multimeter and BAM! That was it. Replaced it and started right up. I wouldn't have guessed the pressure switch. Thanks a zillion!

__________

You are welcome, 10 zillion. :-)

B.

Jul 08, 2011
Next step
by: Randall Bryan

My bad. Had already replaced the unloader with a new one. I am going to totally replace the pressure switch and will let you know, thanks.

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runs then stops will run again in a few minutes

by Wayne
(Battle Lake, MN)

Husky wl651004aj It will run for a minute or two then stops. I shut it off and let iset for a couple minutes and restart it an it runs for a minute or so and shuts down again. I can go thru this cycle all day. Any suggestions?

_____________________
Bill says...

My first inclination is that it's the pressure switch that's bolloxed, but not enough info to be sure.

While it's running is there pressure buildup in the tank? While it's stopped, does this pressure stay in the tank or bleed off somehow?

If you want to provide more info, do so as a comment here so I can follow the thread.

Cheers,

Bill

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Mar 25, 2016
THE FIX
by: Anonymous

It's the thermal circuit breaker on the windings. Just cut the tie wraps that hold it. Or head to you tube and search Husky compressor fix. Super simple and WORKS!

Jul 09, 2011
Husky compressor
by: Wayne

No the pressure does not drop. It just shuts off. When I turn it back on it increases the pressure and shuts down again. You can keep running this cycle until you reach the top pressure. Then it will not build any more pressure of course. Bur will not kick in when pressure reduces un less you turn the switch to off and then on in a few minutes and will then run again for about a minute.

_________________

If the compressor runs long enough to get warm or hot, look for a heat related disconnect, maybe in the switch. Sounds like once it cools down the wires touch again and the compressor runs. That, or the pressure switch.

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