Husky 1.5 HP 6 gallon compressor motor runs but does not build up any pressure. Unit is only 2 years old and is only occassionally used to air up my car tires.

You need to check the pressure shut off switch and the capacitor on the motor.

Hi and welcome to FixYa, I am Kelly. I tried several places too cross this model number: WL65004AJ without success. The pressure switch has 2 settings one for HIGH cutoff and one for LOW cycle on. 1/2 of your pressure switch is not functioning properly. With the proper model number I could find a source for the pressure switch for you. There are a couple of different types of presure switchs, One is a stand alone switch on the air plumbing with no external controls (under $30.00) and one is an all-in-one switch that has the on off switch and air lines connected to it that runs around $86.00. You need a pressure switch.... it is just a matter of finding out which one fits your model and replacing it.
Thanks for choosing FixYa,
Kelly

when i turn it on motor runs but it will not build up air pressure

Is there an option for you to run this compressor on 220 volts vs 110 volts??? If so, you may want to convert it by following the re-wire instructions on the motor or wire access plate/instuction book. The reason your compressor won't fire up again after building pressure is the head pressure is to great at restart and 110 household current is not enough to give the power needed to turn the piston. You'll need to replace the plug and have someone run a 220 volt circuit once the conversion is completed.

sounds like the compression rings on the piston neen replacing or the none return valve faulty.

There should be a reset button on the motor. Try that first. Otherwise, it is a bad pressure switch or internal motor problem. If resetting the motor allows the unit to start, but it just hums, shut it off right away, bleed off all pressure and try again. Let us know what happens.

it sounds like the regulator is out of whack turning down increases air pressure. make sure there is no leaks

First remove the valve using probably about a 1/2" wrench but make sure there is no pressure in the tank before you do so. check the cone and seal by loosening the valve by hand and check for debris. If there is no debris then the problem is either the pressure relief valve or weak pressure regulator but may also be a bad piston seal if it is a direct drive unit.

Problem: My compressor is not producing the air that it once did. It takes twice as long to pump up.
Solution:
1)Turn off your compressor or disconnect the power.
2)Remove the connector tube that sends air to the tank.
3)Remove the head bolts on top of the pump.
4)Remove the head off of your pump.
5)Remove the valve plate off of your pump. It may be a one piece or a 2 piece design.
6)Inspect the valve plate for broken reed valves or broken gaskets above or below the valve plate.

Check the reset button on the motor to see if it tripped. The motor may be overheating. Some motors have an internal breaker and they have to cool off before they restart. Also check the pressure switch. Move the switch back and forth ( on and off ) and listen for a click. If it doesn't click with low to no air pressure then the switch is bad.