Pulled the pressure switch/unloader valve off yesterday, convinced the unloader was malfunctioning. All set to get a new valve or switch assy today. Late last night I went on YT and saw your video. This morning pulled the check valve out of the tank and lo and behold there's a piece of hard verdigris material stuck on the rubber seat of the check valve. Reassembled and she's a ripper. Cost zero. Thank you kind sir for this video, don't envy your job sanding down that boat. Cheers from Australia.

Thanks for the information. I had a similar issue (would not cycle, stall on restart) with a Fortress 2 Gallon Ultra Quiet compressor. Purchased a pressure regulator (unnecessarily) and thanks to your post, I disassembled the check valve to find it not working properly due to aluminum filings preventing the valve from closing. Thank you for taking the time to make the video, very helpful!

Putting together a compressor form a pile of parts. You have answered many questions with this short video. Thank you !

Glad I found this. You were correct about the check valve. Mine had a broken spring. Was able to replace it and now back in business. Great video, you saved me a lot of aggravation.

I appreciate you and this video sir, had the exact issue and since I’m an ac refr tech I didn’t know where to start. I came home and looked up videos online and luckily came across yours with the exact same problem. Beers to u good sir

I just finished watching a heap of your videos for entertainment so I could look for a video on how to fix my compressor and here I am again back at SV Seeker. My compressor has the exact same issue thanks Doug.

Absolutely right. Thank you for the tip! I almost went and bought the more expensive switch. Glad I saw your video. I took my check valve out and found the spring that pushes the rubber valve was in 3 pieces. I took it apart, went to the local hardware store replaced the spring and that fixed the same problem. Thank you!

This was a great help. My compressor is back up and running great. Thank you!

Hey I so appreciate this video. It's because of you I realized my problem wasn't my unloader valve but my check valve. Many thanks. This is what I love about KZfaq . I hope it never changes so much we don't have this aspect. Bless you brother

Glad it was an easy fix in the end.

Thanks for taking the time to make this video which helped me to fix the compressor in the workshop. Cheers

I have a relatively new Quincy that I was about to buy a switch for and then a bleed-off valve. I think you might have just saved me from 2 weeks of wrong part frustration! Many THANKS!!!

Wonder how many times this happens!! Yep, same same here. The pressure regulator people must love it! I’ll check google before ordering on next mystery , thanks!!

You absolutely just solved my issue. I couldn’t figure out what was happening with the relief valve. I think I have a bad tank check valve too. Thx man!

This is exactly what I went through BEFORE I watched this video. I see your description clearly says watch it before buying parts.

I never knew I needed to check that check valve. I guess that's why they call it a check valve, cos ya gotta check that it is checking the return air. Will check it when next I start up my compressor. Cheers Doug.

Welp. Doug... you are officially my number one person on the planet that I want to have a beer with today.

Thank you ,I viewed you video and you saved me from buying parts that imdid not need, a piece of plastic was stuck,in the valve just like yours, cleaned it out and is as good as new now. Thank you

Love the easy to reach drain hose idea.

Thank You for your video it helped me fix my little sears air compressor. It was the check valve on this compressor also there was this small screw inside that had come loose. It’s fixed!!! Thank You

Thanks! you saved me money and time to repair my air compressor! thank you so much!

Thank you you may have just saved me a tone of time and money . Thank you Thank you

So glad I found this video before buying parts. I think you just about saved me a bunch of pointless purchases! This is exactly what my compressor has been doing for a few days now.

Excellent, I have the same problem and will check the check valve today, thanks so much

THIS VIDEO WAS PERFECT. EXACTLY what I needed to see. Thanks man. You just educated me. And I will be able to fix my issue!!!!!!

The only air compressor video that makes sense

The Old Pressure Release Valve...we all need one of those,some days more than others.Thanks for your video,sharing the knowledge.

I think you might have saved me $5000. I’m up in Toronto with a Jun-Air model 3 silent compressor that is having the EXACT same problem that you just described in your video. The service centre wanted to sell me a new compressor - think I’ll invest in a new check valve first. Thanks for the heads-up. Cheers.

Wow! You just saved my but!! Came across your vid, had the same problem with my compressor. Took off the check valve only to see that the spring inside was broken. Just happened to have a similar one lying around, changed it, put it all back together and voila!!! Compressor works as new because of your vid!! Thanks!!🤘🤘

Glad I watched your video. I was just getting ready to tear into my pressure switch. I am sure you nailed my problem exactly,

Use summarized about 900 videos into one awesome simple wonderful stream The Helpful Pleasant very grateful for your video thank you

Functionally operates just as it should kzfaq.infoUgkxiiMg_x4gIWeXMWfBnDdRnME4qJUAva4w holds pressure perfectly when not in use. Glad one of the other reviews pointed out that the bottom pressure release valve was open; thought it was defective at first.

You have just solved my problem I have been trying to fix for over a year. The rather large compressor I have was my late husband toy and when it started to act up after he passed away, I replaced the on/off control box thinking that was the problem! You are my hero! Thank you for your video. I am sure this is my problem and can't wait until I get home to fix the problem.

Just finished refurbing a compressor this week, (replaced the pressure switch, check valve and the safety switch since they all looked old. Also an oil change, as the last guy looked real lax on maintenance. Basically all that carried over was the tank, motor and the pump. Even new gauges). Get all new fittings to upgrade my airflow, feeling good, quick bump to make sure I wired it right. Cool, looking good, no smoke. I stand way back in the yard, cuz all that's left now is concern about the tank, even though it looks solid, no rust, no hollow spots from tapping. It's smooth sailing right up til 70 psi. Speeeeeeeeesh! Brand new safety valve dumps. Umm, omen of further fiddling? 🤔

Looking forward to giving this a try. Thank you.

Thanks a million saved me time, money, and head scratching.

You just saved me a lot of trouble. Thank you so so much.

Great video I made the same mistake replacing the pressure switch on my compressor but your video pointed me in the right direction, cleaned the check valve and it was all good.Thanks

Thanks, your tip worked, took out the foot valve, cleaned it and put it back together, up and running ( and stopping) again

You just saved me lots of time and money…thank you

Thanks so much for posting this CONCISE video. It’s was exactly what I needed to fix my compressor that was blowing fuses and dumping pressure overnight.

I've been stuffing with this thing for 3 hours found your video and 10 minuets it's fixed. Thanks.

Nice , clear straight forward vid... thanks!

You just me a shit load of frustration... Thought I had a dud pressure switch. Came across you post... SAVED!! Winner. 😊😊

I had the same issue. You saved me time and money. Good deal. Thanks

Thanks, had this exact problem. Cleaning out the check valve kept me from throwing money at a whole new pressure switch. One extra symptom I had was when it tried to restart, it popped the circuit breaker. Knowing that check valve is there now, I'm guessing the inrush current is just too high when the cylinder isn't unloaded.

Checked my valve first after watching this. Worked like a charm. Thanks!

First video of my search. Great explanation! Helped me fix my issue as well. Thank you, kind sir.

Excellent video. Better than all the rest

Glad a ran across your video cause I had just ordered a new switch...went out and pulled the check valve and wadda-ya-know. So now a $15 check valve vs $25 switch. You just saved the family from me being pissed off for the better part of a weekend! 😂

Well, I did watch this before I started buying parts. Thank you for that.

*Construction seemed sturdier than other units I considered **MyBest.Tools** Noise level was reasonable. Good pressure and cfm capacity for a small reasonably light compressor.*

I hope my problem is solved as easily. Thanks for posting this video.

holly crap fixed !!! didn't even know that value was there ... Thank You !!

Sad I can only give one like to this video thank you so much

We had that problem not too long ago at work. Called the local parts store, they said bring the valve in for matching. And sure enough, a little piece of trash was in it. Cleaned it out, and works fine now.

Great video, so real world! Thanks!

Just ran into this problem , was going to get a new pressure switch until I saw this . Thank you !

Thanks for explaining it and I had the exact same problem. Fixed

thanks for the video. Now I know how to fix mine. You have saved me time and money.

Great tip Doug! Thanks!

Very good video!

Great explanation. Thanks for sharing.

Of course I didn't watch this video 1st🤦🏽‍♂️. I did the same thing. Bought a new pressure switch, And it's still doing the same thing🤦🏽‍♂️. Watched this video, cleaned the one way valve out. Now she's working fine. And thank you for not putting a bunch of "fluff" in the video, and getting right to the point. it is Greatly appreciated.

Very helpful. Thank you for posting!

I wish I had seen this a few months ago, but hey, better late than never! thank you so much!

Great information and a great video- thanks!

Thanks,I have been hunting for months thinking it was the line or my air blower handel thingy , will check that next/

Thank you for this, saved me a lot of trouble.

Thanks for sharing! Something to consider because I’m having this issue now. Thanks again!

Great explanation of unloader air circuit. Solved my issue, Thank You!!

Thanks for your video. My Hunter 55 will not restart due to residual pressure preloading the motor. (this compressor was given to me, obviously poorly maintained, the air receiver was full with water and sludge). I think I will check out your trouble shooting proceedure as my next step. Thanks again !

Thanks for the upload. Ive managed to fix my issue thanks to your video.

I have worked for managers that would have replaced the whole compressor when it broke, yet they would micro mange the time for tasks to be finished and treated overtime like it was the plague. Most things can be fixed, if you have the time, information, and parts.

nicely done fella😀

Thanks for this! I thought that the pressure switch was defective or something as whenever it was flipped to the off position or hit 150 psi it would let out air like mad, nonstop! Though, looks like that check valve is going to be a royal pain to get out of where it's installed... And that's not even getting to the part where i have to repair said valve, or worse, turn a new one (unlikely) - hoping it'll be an easy fix like the check valve on my smaller husky 5 gallon. Funny how just one broken spring can throw a wrench in the works!

Thank you sir,You just helped me fix my compressor.

Thank you so much good sir. I wondered why my new cut off switch was blowing air just like my old one!? 😩 so after taking various air fitting apart I found the pressure valve gave it a squirt with some silicone grease and boom back in action! I will eventually replace the valve but for now I have a working compressor again.

Very helpful and good video. Thanks!

Excellent! You nailed my problem precisely. Did not know that connection was a check valve and now also understand the unloader aspect. Much appreciated - thank you!

You saved my day thank you so much

Thanks for the video! I just bought a large compressor used and the unloader line was plugged off. Now I know why....the check valve must have gone bad and they rigged it. We have all ordered the wrong part, replaced good parts, then fixed the real problem! Its makes life interesting.

LOL, poetic justice. Stopped by last year after attending a concert in OK. Requested a minimum of twice to see your aircompressor, as my father was compressor tech. Intentions were to point out this common problem on all reciprocating systems, whether reed or disc valve pump. You have reed valves. Commercial reciprocating compressors use disc head valves for reliability, and the check valve will have a 1/8" NPT female thread for the discharge line, not a second line to the head. The check valve is assembled via an internal snap ring, which retains a coil spring pushing a symmetrical 1/2" nylon disc. So the disc can be turned over for a new surface, though trash in the seat is the most common problem. Sorry to leave w/o saying good luck, though it was apparent I had nothing to add. The hierarchy of men is usually a knowledge benefit, just shut down too many times. So realizing it would take a better comprehension of physics to know why the write up left behind is factual, leaving seemed more suitable. Steel doesn't yield to subsonic aluminum, as so many Zero and Baka rocket (MXY-7 Ohka) pilots found out in vain, never sinking so much as a commercial vessel.

Thank you it worked like a charmer

After watching SV Seeker for a few years now if you can't take a bit of criticism and then dont watch it i have learned in life that sometimes you just have to have a laugh at yourself and enjoy life as you said the enevadil is life will come to an end so enjoy it and learn to laugh good video i look forward to them yes i am a bilge rat

What a great, helpful video. Thanks sir.

Love it, "we do it right, cause we do it twice!" Lol!

Great Video. 5 stars.

Thanks for the video, that is exactly what mine is doing. Glad I came on looking for an answer.

Thanks for your video, actually after watching your video I fixed mine with simple step, need 17mm wrench and some gasoline clean up the release valve housing and special the white rubber cheap material seal it’s work again . Make sure after cleaning after build up air you can hear the air leaking out for a short period that’s mean it work. Grease stick around that seal plug can’t pull back the spring and can not release the pressure on the head which it stop the machine refilling . Using the cotton swabs to clean the valve housing don’t t let the gasoline into the tank .Thanks!

Thank you. It did help.

Thank you. I have exactly the same issue with my compressor and did not know about the check valve.👍

Thanks for the information ,Check valve fault fortunately I was able to disassemble and clean mine

Thank you so much. 😃I was about to replace my shut off switch until I watched this. Ran downstairs and removed the check valve. Sure enough. I'm sure the nice coat of rust around it doesn't help either. And I drain the water out after every use.

well you didn't save me from mis-diagnosing it. But after watching this I'm positive this is my problem. thanks!

Good information, thank you.

Thank You for schowing it to us!

Thanks, you are the Man! Peace!

Wow You the man!! This exactly what it was. Thank you sir!!

This video helped me troubleshoot my newly acquired 60 gallon air compressor. I bought it for $100 from someone who overfilled the crankcase, ran it with a terribly slipping belt, nasty oil and an old air filter. With that combo he told me it had a blown pump. Gave it a complete wash in degreaser. Took it apart, cleaned the valve with WD-40 and degreaser. New belt and oil and the compressor works and looks like brand new. In my case the pieces stuck on the check valve came from the disintegrating air filter mesh. Here is your like and a new subscriber!