Question about Campbell Hausfeld 5HP 20 Gallon Single Stage Cast Iron Air Compressor VS5006
How to test pressure switch on 120 volt 5hp compressor module number wl650001aj
Un-plug the compressor and remove the cover to the pressure switch. Inspect wire connections for burned /discolored wires. If not burned, look for button to manually trip switch (switch has on /off lever, place in on position). Test with ohm meter for continuity. Switch is normally closed and contacts are usually visable to evaluate condition. Some compressors use a very small sealed pressure switch that is also normally closed.
Posted on Oct 26, 2012
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Posted on Jan 02, 2017
bad pressure switch or it is wired incorrectly replace switch and check the wiring or could be out of adjustment you compressor is made for max 125psi should be a screw to adjust on the pressure switch near where the wires are connected back out counter clockwise to lower and see if that turns it off
Posted on Feb 26, 2009
This is very hard to do but not impossible. The problem is the rod journal is pressed on the motor shaft. You have to remove the coils / rear end of the motor and carefully place the rotor in a vise. Use a steel rod and hammer to gently force the crank off the shaft by hitting crank from rotor side thru vent holes of front motor housing. It will not be easy and you could easily damage shaft, crank or rotor. (but what the heck, it does not work anyway) If your are successful and able to replace bearing, press the crank back on using loctite then drill 1/8" hole thru crank into shaft and drive in a roll pin. Good Luck!
Posted on Oct 18, 2009
take the power surply cover off and look down the side on the butten at the contacts, id say it isnot the pressur switch itself, and make sure all bolts are tight and check the reeds
Posted on Jul 30, 2010
SOURCE: I need to replace the
Hi, my name is John. Welcome to FixYa. Take the belt with you to most any auto parts store and they will match one up for you. Thanks for choosing FixYa...John
Posted on Nov 23, 2010
Tips for a great answer:
A/C low pressure switch signal circuit is grounded.
A/C refrigerant pressure sensor parameter is less than 2413 kPa (350 psi).
A/C compressor temperature switch contacts are closed.
PCM receives an A/C request from the HVAC control module.
Engine coolant temperature (ECT) is less than 123?°C (253?°F).
This all happens if the PCM sees the right voltage from low & high pressure switches . Plus the fact that you say the compressor comes on when cold, then shuts off 5 min. down the road . Just off the top of my head I'd say you have a pressure switch problem. Possible
A/C Refrigerant Pressure Sensor The A/C refrigerant pressure sensor is a 3-wire piezoelectric pressure transducer. A 5-volt reference, low reference, and signal circuits enable the sensor to operate. The A/C pressure signal can be between 0-5 volts. When the A/C refrigerant pressure is low, the signal value is near 0 volts. When the A/C refrigerant pressure is high, the signal value is near 5 volts. The PCM converts the voltage signal to a pressure value.
The A/C refrigerant pressure sensor protects the A/C system from operating when an excessively high pressure condition exists. The powertrain control module (PCM) disables the compressor clutch if the A/C pressure is more than 2413 kPa (350 psi). The clutch will be enabled after the pressure decreases to less than 1578 kPa (229 psi).
I would check it myself by finding the A/C compressor clutch relay in the under hood fuse / relay box an take a jumper wire an jump pin 87 & 30 sockets , where the relay plugs into the fuse box . If the clutch engages that part is good an there is a control problem ,not the compressor . If you pull the relay out of the fuse box an look on the bottom you should see four set of numbers , 87- 30 & 85 -86 .May have a fifth one 87a , don't worry about that one . There also be a diagram on the side of the relay . You can find videos on you tube testing relays . I would have it checked at another place too ,
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