Manitowoc fan cycle switch

[@stevewood1404]

Dave, The value of this video for the students is: 1. By recovering the charge, it requires us to pull a deep vaccuum before replacing the charge, which is what I teach because the "deep vaccuum", in my opinion is another layer of safety against any moisture that may be in the system, I also like the nitrogen purging, as nitrogen attracts any moisture besides preventing carbon build up. 2 The way you remove the bin takes that extra technician step (as opposed to the "parts changer" approach) of exposing the condenser coil for a complete cleaning (if needed) and the condenser fan blade, etc. Well done! We just received that particular model here at the school. This will make an excellent training video for the students. As always, well done! Woody Elgin Community College HVAC-R Program, Elgin, IL

[@NorCal-refrigeration]

Steve Wood thanks Woody. Do you have the testo probes in class?

[@gsijimbo3572]

Check out his mario kart vid. He does not do things in half measures;lol. He always does it propely:)

[@totaltech8246]

I enjoyed that time lapse at the end. Thanks for another great video!

[@jeffhall2958]

Dave, dude, thanks for this vid! I also work on a lot of Manitowoc's and replaced hundreds of fan cycling switches. A frequent occurrence on Manitowoc Ice Machines. Manitowoc wants you to pinch-off the tube, and braze in the new switch. I call BS on that crap. Once you pinch it off successfully or not, you don't have room to braze in the new switch properly without overheating it. You also cannot make it round again causing a restriction to the control. Why, because there's not enough room to put in heat sink paste or cool it with a rag. I always recover the refrigerant, braze in an extended 1/4" tube, and replace the fan cycling switch where it will be easiest to work on in the future. These guys at Manitowoc don't know field service at all. We do! Great job dude! Please let me know if you have a Manitowoc that has a PTCR as a starting component. Your best bet is to replace that POS with a real Potential Relay and Start Capacitor. Manitowoc is putting those things in their systems now and are failing horribly. Replace any PTCR you see with a potential relay and start cap., on top of the all ready installed run cap., if it's still good. Manitowoc is starting to go cheap and loosing compressors. Enough failures and they will do the right thing while under warranty for the future of their product.

[@davidhedge3142]

I work on a ton of these Neo's up here in Lake County, LOL! Didn't know you make it up to my neck of the woods to make AC repairs...

[@NorCal-refrigeration]

That’s my mother in laws AC the only thing I’m touching up there. 😂🤘😂

[@davejohnsonnola2758]

Good tips, especially about jumping the pins for running without the bin and interface!

[@williamloper9260]

I have never felt comfortable either with the pinch off method too much potential for leaks . Good Job Dave!

[@NorCal-refrigeration]

William Loper I always had leaks doing it. ( my fault ). So I decided to just do it the long way every time. Once it's the norm it's fast and simple, with 100% success

[@williamloper9260]

I agree 100% some of these manufacturers are getting cheap and it's going to bite them in the long run

[@billwalton1454]

NorCal, I watch your videos so much now that my kids start singing and dancing to We love the Lurkers. That's some catchy s**t!

[@NorCal-refrigeration]

Bill Walton wow! Thanks Bill.

[@billwalton1454]

Nor-Cal Refrigeration & H.V.A.C Not kidding. They all shout the "Good God" part right on cue. Pretty funny. Great job w/ the channel!

[@NorCal-refrigeration]

Bill Walton that's awesome

[@gsijimbo3572]

Damn mate. They braze a pressure switch on. The ones i change are on like a threaded port with a schrader. Quick n easy. Good job anyway, ta for sharing

[@manny6668]

Thanks for the videos Dave. Good job sir.

[@hvacrjunky6119]

Cool special-effects with the ice forming

[@bradcapps5684]

Thanks Dave, I appreciate your videos

[@moparsrt822]

Pinch off tool ?vise grip?

[@timothybreen1627]

I have a remote condenser unit is the fan supposed to cycle off during harvest mode at 85 ambient

[@whitesheatingairappliancer7101]

How low of a vacuum do you pull? I ask because I pulled a vacume down to 170 to 200 microns and the compressor locked up. I thought the Poe oil might have been removed from pulling such a low vacuum. Nice video thank you.

[@Gears.and.Gadgets]

Ron White factory says to pull a vacuum at least 300 microns.

[@tjb099]

The new pressure switches have an end that is swaged down, is this swaged down enough to fit inside the tube that remains after cutting out the old switch?

[@jacerichard8067]

Does the fan cycle switch cause the compressor an fan not to run ?

[@wascomj]

I have a Manitowoc DS 2072c. Is it possible low 404a would cause 2nd side of the ice tray to drop 3 minutes after the 1st one drops if it drops at all?

[@repetemyname842]

Nice, Dave. We dont like no pinch off guys around here!

[@aircooledtx]

Good work, Dave

[@hvactechpr7872]

awesome one!! haven't been on for a while I've been slammed with work!!

[@ApplianceRep]

Do you recommend recovering from the high side or what is a good technique?

[@reedstephens5208]

By bypassing the fan control does it affect harvest at all?

[@NorCal-refrigeration]

it will its a temp. hack till you get new switch.

[@reedstephens5208]

Roger My mani iy0520 fan cycle just went out this morning, your vids are always my go to! Older machine, thinking of doing a tee on the high side service port and flare fitting on new switch………

[@brnmcc01]

@@reedstephens5208 Just install a normally open relay instead to control the fan and forget this troublesome fan cycling pressure switch. You want the fan to be on at all times except when the hot gas solenoid is powered. Very cheap and easy fix, works much better than a pressure switch... What I do is get a cheap 120v coil relay, and power the relay coil by splicing into the wires that go to the hot gas solenoid. A small white rogers Type 91 relay uses so little volt amps for the coil, it won't bother the machine, and then connect the two wires that used to go to the fan cycling switch to Common, and normally closed contacts on the relay. This nice thing with those relays is you have 2 sets of contacts, so if one set gets burned you can use the other one. If the contacts get welded or the relay fails, just use spade terminals to land the wires on the relay. That way in the future if it fails you're only out like $20 or less, and it's a simple 2 minute easy parts change to fix. Forget evacuating the machine, brazing, change filter drier (which is a PITA to get to on some machines), burning wires with trying to squeeze a torch into those small spaces, and then recharging.

[@HVACRBERT]

glad i watched the vid. getting to do one this afternoon and i forgot about the pinch off tools havent used one in years i have never had a failure using them hope i didnt just jinx myself lolo

[@davidpetersen4290]

Nice job as always

[@BlackHawkPSU]

What problem was the faulty fan cycle switch causing? I tear down and clean and sanitize my Neo U140 every 3-4 months and after every cleaning I get a huge block of thick ice that won't melt off the evaporator. It happens for a while and then corrects itself. Unfortunately this time no matter where I put the ice thickness float I get ice that's way too thick. Any help is appreciated in determining what's wrong. Thanks!

[@NorCal-refrigeration]

Dose it have a small probe by the floats?

[@BlackHawkPSU]

@@NorCal-refrigeration No it does not have a small probe by the floats. It was manufactured in 2014. The floats are part numbers Manitowoc 040001783 Ice Thickness Float Switch and 040002396 Harvest Float Switch. The bridge thickness is now staying too large even with the thickness float set on the smallest cube setting. The bridge is at least 1/4" thick or a little more. At this time at least the sheets of ice are falling off the evap.

[@BlackHawkPSU]

@@NorCal-refrigeration I just replaced both floats and still the same result! This video showing all... kzbin.info/www/bejne/oWrQl32qhstnbtk

[@BlackHawkPSU]

Would a faulty fan cycle switch cause a thick bridge issue? What if the fan cycle switch was bypassed for several months? Thanks!

[@NorCal-refrigeration]

I would not think so. Ice thickness probe and board should initiate harvest. I usually find poor harvest due to lack of heat in harvest when fan cycle is by passed.

[@BlackHawkPSU]

@@NorCal-refrigeration I ask because this goofy NEO has the fan cycle switch bypassed for several months. The harvest float was artificially raised very high in order to go into harvest or else water keeps running and a huge slab is formed on the evap. New floats installed, new pump, and new keypad. Condenser is clean as a whistle as is the entire machine inside and out. Machine is level. 2014 model

[@billcv80]

Thanks for the video, just had to clean one in a hippie restaurant, the water system on this new design is small up top at distribution. Her old mani never got properly cleaned. Just seems like the clearance is small at distribution, the scud builds up quick. You liking the mr45? Gotta buy one soon, about to get licensed in FL....

[@NorCal-refrigeration]

billcv80 I do like the MR45. It's light weight and works great.

[@drcolster]

Manitowoc should use the Encapsulated Pressure switches that Screw on to a Schrader Valve/Access Valve... the only way...no gas loss, quick and logical...

[@NorCal-refrigeration]

drcolster I do that when out of warranty

[@gonzgarr1592]

those are great on a/c i use them all the time

[@nocompeterefrigerationserv7501]

drcolster - If they do that , no Job security!😆

[@ralphhalili8511]

Dave another awesome video thanks! Which nitrogen regulator do you use for flowing nitrogen when brazing? Are for pressurerising the system? Thank you!

[@NorCal-refrigeration]

ralph halili I have the NV-500 and a standard regulator. Both work fine.

[@ralphhalili8511]

Thank You Guru Dave

[@foxfamilyhvac]

Great video!

[@johnbonilla2220]

How far do you travel? Having an issue with my Manitowoc up in Tehama county.

[@NorCal-refrigeration]

Not that far.

[@seangivens2770]

QUESTION? WHAT HAPPEN TO JIM PETTINATO

[@NorCal-refrigeration]

Sean Givens I do not know. But I miss his videos.

[@RealityRenovations]

Is it normal for the fan to cycle on and off a lot on these particular units? I have a slightly smaller one and the fan runs in pretty short bursts.

[@NorCal-refrigeration]

Brad B what ambient temp? If it's cold they will cycle. But Manitowoc had a bad run of the fan cycle switches and changed venders. If your machine is still in warranty get it looked at.

[@santiagomarron2201]

hey my name is santiago I'm having trouble fixing my Manitowoc not turn on, there's power going in the motherboard but no coming out I was Wondering if you could help me out sorry for my bad readying

[@TheMalcolm02789]

Anyone have the part number for the fan cycle switch?

[@craigmarshall40]

Great videos I am just started doing Commercial HVAC I was a residential HVAC tech and switch over . My mentor does not use nitrogen is that ok I am good with that is not needed

[@Jason-wc3fh]

You mentor is a typical residential hack that doesn't use nitrogen. Without nitrogen, you ask for problems and contamination inside the pipes to clog metering devices and other issues. Any real refrigeration tech is quite familiar with nitrogen. It also saves on time when pulling down since you can inject some dry nitrogen to get remaining moisture out of a system during triple evacs.

[@theairconditioningguy]

I always saw you more like a classic rock type of guy.

[@NorCal-refrigeration]

The Air Conditioning Guy I'm a life long musician and love every type of music I can here. Do you work in anihiem I have a friend who's moms is out there might be in need of of a new system.

[@theairconditioningguy]

Nor-Cal Refrigeration & H.V.A.C... Sadly I don't. I appreciate you thinking of me though. :)

[@NorCal-refrigeration]

The Air Conditioning Guy no worries. Keep up the good work.

[@harrydickson4575]

Nice job Dave 👍

[@brnmcc01]

That bypass doesn't work, I tried that but it cools the condenser too much with the fans running all the time, and then the machine takes too long to harvest. I had an old machine with this same problem that I fixed this on last year. You do not need to replace that fan cycling switch. It's totally stupid (unless the machine is running somewhere where the ambient temp is below 50 degrees which isn't a good idea anyway). What I did to fix a 2002 era Manitowoc machine (QY280 series) was remove the wires from the fan cycling pressure switch and run them thru the normally open contacts on a small 120v White Rogers Type 91 relay I installed in the electrical compartment. And then power the relay coil by splicing into the hot gas solenoid power supply. This way when the hot gas valve is energized, the condenser fan immediately turns off, and when the harvest is complete the fan is powered again. The machine now actually works much better with this, since the fan stops instantly instead of wasting some of the hot gas before the head pressure drops enough for the fan to stop during harvest, and it starts freezing faster since there isn't a spike in head pressure at the beginning of the freeze cycle. Doing it this way with recovering the charge, ordering a new fan cycling pressure switch, brazing, vacuum, recharge the machine would have cost the customer nearly as much as that machine was new, and much too expensive for a 20 year old ice machine. Cost of a cheap 120v relay and some wiring is so much cheaper, and actually much more reliable in the long run. For some reason those OEM fan cycling switches seem to fail a lot, maybe they can't handle the inrush current of a 9 watt condenser fan motor... lol. And replacing that relay is a cinch if it ever fails, I used spade terminals so any parts changer in the future could fix it, swap the relay and go. That was a dumb idea from Manitowoc, an air cooled machine designed to be run indoors in a conditioned space does not need a fan cycling switch. For example no reach in refrigerators or freezers that I know of have a fan cycling switch, except maybe Coca-Cola can/bottle coin operated vending machines, or outdoor ice freezers at a gas station, but those are outdoor rated appliances. Ice machines do not work well in unheated spaces or outdoors...

[@NorCal-refrigeration]

I think the fan cycling is in there for the motel hotel industry where machines are out doors.

[@gr82becool]

Nice video!

[@bruceshepherd6217]

BOY THAT GOING TO COST HERE

[@kingofthecrease30]

i never use pinch off tools...they just dont work right and its such a pain in the ass...i have told my factory rep at manitowoc its easier to recover and replace....its less than 1 lb gas

[@capitolrefrigerationheatin7501]

yes, that pinch off tool is a pain

[@NorCal-refrigeration]

Capitol Refrigeration,Heating,and Cooling I have never had good luck with them so early on in my career I just got used to doing it the long way which became the short way for me.

[@Jeepjones85]

Haha I have one jumped out right now lol

[@jonhvac]

You don't want to get in a pinch😹

[@AladinThSv]

I learn nothing from this video

[@OcRefrig]

Really good video !