Central Pneumatic Model 94667
       will only-buildup to 40lbs

Here are some questions,answers and comments about the Central Pneumatic Model 94667 air compressor, including why a Central Pneumatic Model 94667 will only buildup to 40 lbs per square inch of pressure.

If you still need an answer to a question, or you wish to post a comment to help a fellow user of this model of air compressore, there is a link to the forum at the end of this page.

New Question: My Central Pneumatic model # 94667,will only build pressure up to 40 lbs. and continues to run. and how do I get replacement parts. I took the head off pump (piston)to see if something was blocking the air line. It was running great then started to sound different. How do I get replacement parts?

Central Pneumatic 94667 air compressor

Response: Howdy. Please read the page linked from the troubleshooting section on the site map page, compressor-will-not-build-pressure page. You will see there are many reasons why a compressor will not build pressure, and some of reasons apply to your air compressor, I think.

If the compressor is running well but pressure is rising in the tank very slowly or the tank pressure peaks at a lower pressure than the normal cut out pressure, and the compressor, that is often indicative of a leaking valve(s) or leaking gasket(s).

As to parts for your compressor, when you determine specifically what you need, you can certainly post your requirements here on the compressor parts needed page for folks to see and help. Or, check with Harbor Freight directly or ask your local store where they send their compressors for warranty repair That location may be able to help you with parts for your CP compressor.

New Question: Model 94667 tries to start but will not run? My air compressor will try to turn over but will not start. I took it to my shop and drained the water from the drain valve, set it upright and it ran fine. I took it back home the next day and it would not start again. This time the motor will not turn over and when I turn the compressor on, the overhead light gets a lot brighter. Do I have a short or is the capacitor gone. Which capacitor whould be the problem? (Start or run capacitor or both?) Thanks, JMB

Response: Only way to know for sure is to test them both, and you might as well get a motor load check done as well. From what you say, your compressor is pulling more power than normal, and indication that the start capacitor may be an issue. Will the compressor start if the air pressure in the tank is zero? If yes, also check your UNLOADER VALVE to be sure that it is operating properly.

New Question: Model 94667 won't run more than a few seconds at a time? This happens regardless the ambient temperature or the air pressure in the tank. Oil level is correct. I bought the compressor used. The compressor is plugged directly into an outlet which has no other load and is about 20 feet from the breaker box.

When I turn the on/off switch on, the compressor will run for 10 to 20 seconds and the overload switch pops out and shuts the compressor down. I can immediately turn the on/off switch off, wait about 10 seconds until I hear a click from the pressure switch and reset the overload switch. I can repeat this over and over (with enough patience) until I get the pressure I want in the tank. The motor, compressor, and fittings around the pressure switch do not get not. No unusual noises.

Have any idea why the overload keeps kicking off? Of course, this is a discontinued model. The local store says they send compressors back to a central location for repairs. I called customer support. Without a Harbor Freight receip, they will not help. Did I simply buy an expensive donation to the scrap metal recycler at the landfill? Thanks

Response: Dan, the landfill thanks you for your contribution! :-) Just kidding.

It seems to me that your motor may be running under-powered, a situation that quickly generates heat. I suggest you check your start / run capacitor to see if it's jake. There is a page on this site about how to do that. Did that make a difference? Post a comment with results or more questions, if you wish.

Comment: by: Dan Does not look good... All I could find on this site about testing the capacitors directed the owners to take them to a shop. In the threads I could find you were reluctant to tell anyone how to discharge a cap (don't blame you!).

So I took the plastic shroud off to eyeball the caps and saw that the spade terminals for the overload switch appeared to have some corrosion on them. I touched the white lead (I swear I just TOUCHED it!) and the connector broke in two. As in the crimped part still attached to the wire and the spade female still solidly attached to the male.

I called the one shop in the area to inquire about a checkout and possible repair. They want about half what I paid for the compressor just to take a look. Non-refundable, of course. Since I would at the least need a new overload switch and the local shop ain't revealing their sources, looks like the landfill is going to get that donation.

Response: I believe you Dan, honest. You just touched it and it broke! :-) See the electrical troubleshooting section on the sitemap page for the testing capacitor page if you are still interested.

Re this... "I touched the white lead (I swear I just TOUCHED it!) and the connector broke in two." a bit of fine sandpaper, a bit of plumber flux, a propane torch and some plumbers solder and it's fixed... done it myself. It works fine. Or, easier to realize that cheap air compressors are just that, cheap, and are not meant for long use and user maintenance, and hello dump!

Where I am, it would cost $10-$20 to dump a compressor though, so I've got added incentive to keep them going. And, for the longer term, see my video on the $10 air compressor. You have lots of value in the one you are about to throw away.

New Question: Central Pneumatic Air compressor #94667, 21 Gallon compressor. There is a brass check valve on the FENWAI FW-10 pressure control valve that has started leaking air ,its the valve that turns the compressor on and off AUTOMATICALLY. I am told by Harbor Freight that this part is not available or obsolete, then it is suggested that the pressure switch off of model 95386 may work on my model; however, since the two models are not directly cross referenced against each other, they cannot guarantee a direct fit. In other words purchase at your own risk.

My best suggestion is to buy minimum (2) two year extended warranty cause this "BRAND" Central pneumatic Air compressors are only built to last approximately (1.5) one and a half years from date of purchase.

This is my second compressor of this brand and it lasted about the same as the first . I thought the first was just coincidence but now the second one having problems as well and then reading other online complaints I think this Brand is "PLAGUED" No More for me. BUY AT YOUR OWN RISK!!!!

Response: Tilmon, before doing anything else, dump all the air with the compressor off, remove, clean, and replace the tank check valve and see if this resolves the issue. If not, post a new question on the forum page, link below.

If you wish to post a question this is the forum page for the #94667.