Question about Mi T M 2 Hp, 110V, Twin Stack, Compressor, 4.1 CFM 100 Psi

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Compressor stopped compressing during floor installation. Was at 100 psi and now has dropped down to80 psi. The unit will not start. Outlet is fine, checked with other applicances. Compressor had been working for 5 hours previously.

Posted by phildancison on


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Check if there is a overload/temp reset button the end of the electric motor?

Posted on Nov 07, 2009


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Makita MAC5200.Brand new.Just broke-in. Pressure goes to 140 PSI and stops.Tries restart at 110 PSI.Motor"Humms"only.Will not restart until pressure below 20PSI.
There is a part called an unloader. It reduces the pressure on the compressor when the unit stops at the desired pressure. The actual unloader may be part of number 50 in this diagram.

Dec 18, 2016 | Makita Air Tools & Compressors

1 Answer

Poor air compression

I would guess from the info supplied that the pressure switch is shutting it down at 125. Most piston type compressor only pump a max. of 175 unless it is a special high pressure unit. Also it may be shutting down on high amps, high temp etc.However with all that said Piston units are positive displacement, meanning that it should pump until something gives. Start your unit, close the discharge air valve and see what it pumps up to. May have to adjust pressure switch to get over 125. If unit runs and runs and just will not go over 125, you probably have a valve going bad. Do you have a safety lifting. if so another indication of a bad valve.

Nov 27, 2011 | Ingersoll Air Tools & Compressors

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My tomos revival ran fine then started losing power and droped in speed whay do I look for, plug is fine carb clean, air cleaner clean bike has 1200 senior miles

Well i always do the easier method to find out the problem.
hers a few things to do to determine whats wrong.
1st pull spark plug and do compression test, a blown head gasket will lose compression.
if the gasket is blown then the compression test will read a low psi and drop suddenly
2nd worn piston rings will lose compression, the compression test will read a very low psi below 100 psi and may leak right down depending on how worn the rings are.

that would make you lose power.
have it tested to see which it is.

either way, a lose of power in the motor is caused by lose of compression in the motor.
you can do the test your self, you can buy a compression tester pretty cheap, just make sure you don't cross thread the connectors.
have a good weekend
Big Al

May 21, 2011 | Tomos F 800 R Motorcycles

1 Answer

Compressor UP6 25 125, runs all the time but is only under load for a short time, should it shut down between loads?

This unit will shut down if unloaded for a set period of time. Usually 5 to 10 minutes. This time could be longer if some one has changed it from the factory setting. There is a timer in the control box that starts counting down when the unit unloads. If it stays unloaded long enough for the timer to count down the unit will stop until the air pressure drops to the low set point on the pressure switch. It will then start up. If the unit loads before the counter counts down the timer starts from the beginning when it unloads again. This cycle continues until you manually shut it down or you stop using air long enough for the timer to reach Zero and shut down.

Apr 22, 2011 | Ingersoll Rand UP6-25-125 120 Gallon...

1 Answer

I replaced the compressor on my refrigerator. There were no tags as to how much freon the system takes. So I added enough to bring the low side to 72 psi w/ a cabinet temp of 70 degrees. The high side...

**** boy. 72 psi on the low side? It ain't an air conditioner. The low side should be never over 5 PSI. The whole system holds only arounf 4 ounces. What were ya thankin? LOL WOW you will be lucky if the reed valves ain't blown in the new compressor. Go ahead and evacuate the system. Pull that ****** down to as close to negative 30 as you can and then shut her down. Just crack open the freon a hair and let it SLOWL:Y build to no more than 5PSI on the low side.

If you need further help, reach me via phone at

Feb 17, 2011 | Refrigerators

1 Answer

Compressor comes on then stops wait a min comes on again and imediatly stops again

If you are using the air supply between when it stops and when it comes on again, then this might be normal. You havent mentioned what model/size compressor you have, but if is only a small 1-4 Gallon tank model, then these dont really hold a lot of air, and if you are using any air tool that uses a lot of air, you will be exhausting the tank supply VERY quickly, so the compressor fires up again to refill the tank.

If the compressor is only staying on for a split second after it fires up again, try plugging the compressor in directly to a wall outlet (ensuring the outlet is properly rated) and avoid using extension cords, which can leave the compressor with little power to overcome the tank pressure to kick over and refill. Compressors are best run directly connected to a main outlet, not via an extension cord.

There may also be a problem with the switching/regulating mechanism for the motor if it is jumping on and off in rapid succession. Check your regulator/tank pressure gauge. Take note of what pressure it kicks back on at, and what pressure it stops at. Many compressors will kick back in when the tank pressure drops to 80 PSI, and may stop when the pressure reaches 100-120 PSI.

I hope that helps!

Feb 13, 2011 | General Air Tools & Compressors

1 Answer

24ABR348A0031010 compressor starts then stops. Carrier 4 ton R22 unit. Worked great, then fan runs all the time. Compressor will start for less than a minute, then stop. Basically compressor will not stay...

Hello RR Hard start can't hurt BUT dosen't sound like the problem.Do you have a scroll compressor?They don't need a kit.Does it start every time?It could be short cycling on LOW PRESSURE SWITCH.If the unit is (pumping down) during the run time you have a restriction in the system.Make sure the service valves are open ,do you have a filter dryer colgging up or a bad TXV valve also could cause short run times.20-30 PSI the switch cuts out.

Jul 15, 2010 | Carrier 38BRC036 Air Conditioner

1 Answer

Compressor won't kick back on when its suppose too

The tank check valve is probably bad. Folow the large discharge line off the head, disconnecting one end of it. If you get air out of the line you have a bad check valve. If you don't get air you are probably looking at a valve job.

Apr 04, 2009 | Dewalt d55151 factory reconditioned emglo...

1 Answer

Air compressor switch

That means that when the switch is turned on , and the complessor is pluged into a power outlet, the electric motor will start when the air pressure in the tank drops below 80 psi.and the motor will stop when the pressure reaches 100 psi.

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Aug 30, 2008 | Air Tools & Compressors

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