Question about Craftsman Air Tools & Compressors

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Motor doesn't seem to have enough gumption to restart the compressor once enough air is bled off the system to re-engage the pressure switch. The run capacitor is new, I have cleaned and dressed the starting switch components, checked the head air release and it works properly. Motor will start and run without the drag of the compressor, but when belt is tightened at start up, it just turns very slowly and won't kick up. Don't know where to go from here.

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,then either the motors centrifigual start switch spring are bad and wont let it off the start windings,the motor end bearings are tightening up from age,lack of lube,or heat,or the compressors bearings are doing the same,have you put an amprobe on the unit to check for current draw with different things hooked up or disconnected

Posted on Mar 23, 2011

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I hav a magnum compressor model ac0205tt103902 two hp , five gallon unit when tank is empty it works well but when using it and it kicks in it kicks 20amp breaker


Compressors are set up so when the motor shuts off the air in the compressor pump head is bled off so the motor can restart easily when the pressure in the tank drops to the restart point. The usual culprit for problems with this system is the tank check valve. It's where the line from the pump goes into the tank. It lets air into the tank then closes when the motor shuts off and the bleed-off valve opens. The spring could be broke or the valve is dirty or jambed. Sometimes they can be cleaned but more often than not they have to be replaced. The bleed-off valve on the pressure switch could be the problem but that's rare. If it is the bleed-off valve, you'll have to replace the pressure switch.

Feb 07, 2013 | Air Tools & Compressors

1 Answer

Ac vent blower


proceed according and fix it. God bless you
If so, the compressor is working and the A/C system probably contains enough refrigerant to make cold air, so the problem is inside the HVAC unit. Replace the motor that controls the blend air door (this is a difficult job and best left to a professional since it involves tearing apart the HVAC unit -- about an 8 to 10 hour job!).
If the compressor does not engage when you turn on the A/C, see if it will run by jumping the compressor clutch wire directly to the battery (use a fused jumper wire). If the compressor works when you jump it, and the A/C blows cold air, the system contains refrigerant and the fault is likely a bad A/C compressor clutch relay or a bad clutch cycling switch or pressure switch.
If the compressor does not engage when you jump it, the problem is a bad compressor clutch.
If the clutch engages but the compressor does not turn (the belt will start to slip and squeal), the compressor is locked up and you need a new compressor.
If the compressor clutch engages and turns the compressor, but the A/C still does not blow cold air, the system is probably low on refrigerant and needs to be recharged

10_5_2012_12_14_20_pm.jpg

Oct 05, 2012 | 2001 Oldsmobile Aurora

1 Answer

2007 ford KA blowing hot air


see this causes and fix it. God bless you
Compressor Checks
checkmark.gif Start with the compressor. Does it engage when you turn on the A/C?
If so, the compressor is working and the A/C system probably contains enough refrigerant to make cold air, so the problem is inside the HVAC unit. Replace the motor that controls the blend air door (this is a difficult job and best left to a professional since it involves tearing apart the HVAC unit -- about an 8 to 10 hour job!).
If the compressor does not engage when you turn on the A/C, see if it will run by jumping the compressor clutch wire directly to the battery (use a fused jumper wire). If the compressor works when you jump it, and the A/C blows cold air, the system contains refrigerant and the fault is likely a bad A/C compressor clutch relay or a bad clutch cycling switch or pressure switch.
If the compressor does not engage when you jump it, the problem is a bad compressor clutch.
If the clutch engages but the compressor does not turn (the belt will start to slip and squeal), the compressor is locked up and you need a new compressor.
If the compressor clutch engages and turns the compressor, but the A/C still does not blow cold air, the system is probably low on refrigerant and needs to be recharged.
Refrigerant Checks
checkmark.gif Connect an A/C pressure gauge to the HIGH SIDE service port (located in the high pressure hose that runs between the compressor and the condenser in the front of the engine compartment). The gauge will tell you if there is any pressure in the system. Simply depressing the service fitting valve with a small screwdriver to see if any refrigerant squirts out is NOT an accurate check because it tell you how much pressure is in the system. It may still have some pressure but not enough to trip the low pressure safety switch so the compressor will engage.
If your A/C system is low or out of refrigerant, check for leaks, then have the A/C system vacuum purged to remove air. After the air is out, it can be recharged with the specified amount of refrigerant. It is important to get any air out as this will reduce cooling efficiency and may make the compressor noisy.
A/C System Functional Checks
checkmark.gif If the refrigeration circuit seems to be working (refrigerant in the system, compressor running and building pressure), but there is still no cooling, the problem might be an obstruction in the orifice tube (located in the high pressure hose between the condenser in the front of the radiator, and the evaporator located in the passenger compartment). A blockage here will prevent the refrigerant from entering the evaporator or recirculating through the refrigeration circuit.
If the orifice tube is plugged, the high side pressure reading will be lower than normal, and the low side reading will also be lower than normal because no refrigerant is circulating through the system.
checkmark.gif If the refrigeration circuit seems to be functioning normally (compressor running, frost or condensation on the high pressure line from the condenser to the evaporator), but no cool air is blowing out of the ducts inside the car (and the blower is working), the fault is likely a BLEND AIR door that is stuck in the HEAT position, or possibly a badly clogged cabin air filter that is restricting airflow. Another possibility would be a fault in the automatic climate control system such as a ad interior temperature sensor or control module.

Sep 28, 2012 | 2007 Ford Ka 1.3

2 Answers

Vt aircon compressor wont engage


check the freon, if there isn't enough it won't engage, could also be the low pressure switch or a fuse.

Sep 05, 2012 | Holden Cars & Trucks

1 Answer

My 2002 neon's A/C blows warm air. The vent pressure is working well- but it blows warmer than the outside air. Can I fix this myself? What might the problem be?


If you are handy, yes you can. Most likely causes are loss of freon which would prevent the compressor clutch from being engaged and operating the compressor, a lack of 12 volts being applied to the compressor clutch because the a/c compressor fuse or relay has failed, preventing the clutch from engaging the compressor, or the compressor clutch itself failing. Easy test is to watch the compressor pulley with the motor running. The pulley will, of course be spinning, but the circular assembly mounted to the front of the pulley will spin with the pulley only when the compressor is engaged. There is a sensor mounted to the a/c line that prevents the clutch from engaging the compressor if there in not enough freon in the system. You could go to auto zone or checker and buy a can of freon r-134 with a hose for around $15.00. It is fairly easy to follow the instructions to charge the system. If, after allowing some of the can to pressurize the system, the compressor clutch engages then you can continue to charge the system. Cold air should start to blow by the time the can is empty. Or you can locate the a/c relay located in the fuse panel, remove its plastic cover and manually close the contacts while observing the compressor pulley assembly. If the clutch doesn't engage then the problem in probably electrical, a fuse, the relay or the electric clutch itself. Go to auto zone and check you their dvd on a/c repair for under $9.00. Hope this helps! Dano

Jul 01, 2011 | 2002 Dodge Neon

2 Answers

Compressor runs and compress air,but when air setting is depleted compressor will not start to compress more air.If you waite it will start some times do think this might the compressor switch


If it doesn't try to start, then it could be the pressure switch. Another suspect could be the thermal overload on the motor. The motor (or just the overload) might be overheating and shutting the unit off, then allowing it to restart when it cools.

Is there any humming, or does it blow the breaker? When ot shuts off, do you hear a brief hiss of air?

If there is humming or breaker blowing on restart, or no hiss of air at shutoff, the pressure switch unloader valve is probably bad. If the air blows off, and there is no humming, and the compressor doesn't reliably start, it is probably the pressure switch. If pressure drops too low, give the pressure switch a tap with a screwdriver. If it starts then, the pressure switch is your problem.

Jun 02, 2011 | Air Tools & Compressors

1 Answer

When cold compressor starts and fills up with air. after used with power tools, the compressor wont restart.


you may have a bad pressure switch:

Unplug the compressor. Drain the tank down to zero. Close the drain. Get down close to the pressure switch and have someone else plug the compressor back in while you are closely monitoring the pressure switch. Do you hear anything happen? Do you see any movement in the pressure switch.
by plugging it in with the tank at zero pressure, you should hear a click as the pressure switch trips due to low pressure. It should trip and send power to the electric motor. If this doesn't happen, you may have a pressure switch problem.

Apr 17, 2011 | Ridgid 17038 4.5 Gallon Oil Free Twinstack...

3 Answers

My air conditioner clutch wont engage, it works


Of your system is working correctly except for the switch, it should continue to do so without the switch. However, if something fails in the system you risk sustaining more damage...just as removing a fuse from an electrical system will. One thing you did not mention is the compressor relay...have you checked that? It feeds power to high and low switches, so likely you have.

Jul 26, 2009 | Pontiac Grand Am Cars & Trucks

1 Answer

Air con not working in 93 corolla seca.


Hello. Thnaks for choosing FixYa for assistance.

The A/C compressor will not engage (get power) if there is not sufficient freon in the system. There is a pressure switch that opens, and eliminates power to the compressor (pump) if there is not enough freon (which creates pressure), to close the switch and allow the current to flow to the compressor. Check for leaks at the condenser (in front of the radiator).
That is the most common place for leakage to occur.

The graciousness of a FIxYa rating for my assistance would be greatly appreciated. Thnanks in advance.

Jan 25, 2009 | 1993 Toyota Corolla

1 Answer

Air conditioner not cooling


Is 1 of the 2 AC (under the hood) lines cold? if so you may have a blend door problem, that door is in the dash air duct distribution system, it mixes are between the hot heater core and the cold AC evaporater core to give the set or desired air outlet temp, When you turn the defrost on does it blow hot/cold as the lever is moved back and forth? The compressor turning off and on is normal cycling of the system, when it reaches a preset pressure in the low side line, a pressure switch will open and compressor will "cycle off" when the press starts to rise to a preset limit the compressor will "cycle on" and so on. I assume you have an electric bled door, older cars and trucks use a cable operated mechanical door.

Jul 25, 2008 | 1999 GMC Suburban

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