I hope this information helps, if you will have a similar problem.
“I purchased my craftsman 2 stage twin v air compressor model 919.167783 in 2007. A few days ago it started leaking air at the pressure switch release valve on the side of the pressure switch. I know that it normally releases a blast of air there when the compressor shuts off. It now leaks continuously any time the pressure switch is in the off position. I replaced the pressure switch with a new sears craftsman switch and the new switch leaks air just like the old one. Is the new switch defective or is there another problem to look for? The compressor will run and build pressure as it always has but when it reaches the cut off point the air will continue to leak from the pressure release valve. If you manually turn the switch to the off position before it reaches the cutoff cycle it will start leaking as soon as you cut it off, if you cut it back on it will continue to build pressure until it reaches the cutoff point and again start leaking air.
Thanks for any advice you might offer!!”
Thank you for the question.
I believe you are referring to the relief on the side of the pressure switch. The relief valve is use to relieve the pressure in the pump and the line when it turns off. If air continues to leak out of the valve when it is turned off, the check valve is defective. The check valve is a one-way valve that allows the air to enter the tank but not come back out. You can try to clean the check valve first. The instructions for cleaning the check valve are posted in the image . If cleaning the check valve does not cure the problem, I recommend replacing the check valve.
Here is a link to order any parts you need. Sears Parts Direct .
If you do not feel confident repairing this problem yourself, then you can have it repaired by a Sears technician. Here is a link that will provide the nearest drop-off locations: Sears Home Services .
Thank you for using Manage my life.
Mark T.
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