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Duct tape on the compressor shell and the txv valve and the cold pipes. You need better insulation and duct tape is a good start. If you wrap the aformentioned parts with cotton linen and then tape...

If you need the super duper secret password and you don't know it then you probably don't know how to handle the power behind it.

Don't ruin the Liebert system, the owner will be rightfully mad at...

It sounds like an incomplete ignition or flame sense/control board problem. If you are a homeowner I strongly urge you to call an HVAC professional to check your furnace, this doesn't seem like the...

I understand now that the closer the micron gauge is to the pump, the more likely the gauge will pick up only the pump and not the rest of the system. Though, any gauge is better than the "30 minute...

This is the best video I've seen about superheat/subcool

If an r134a refrigerator is running, it is a problem no matter what. My 22 year old hotpoint r12 refrigerator is still going, the startups seem to get harder and harder with each passing year but...

Those open drive compressors never seem to die they say, unless the oil ran out or the bearings were stressed by improper alignment

5 fingers discount at johnstone supply, only costs 5 years


real answer:
Try out Just Better, every single technician and my service manager says that is their preferred brand. Install division...

Just make sure the connections don't leak, no matter how you do it. Bigger hoses = better evacuation times

A 4-way adapter works great, bottom part screws into pump, top connection for your micron...

S&K, it never slipped on me. Available at any Grainger usually in stock, if not, just a day away. You pay for a good tool though, and NEVER lend an S&K tool out to ANYBODY

If you need a great tool at a great price just go to Grainger. S&K for wrenches and socket sets, Wiha for screwdrivers, and knipex/channellock/klein for pliers. They always have everything in stock....

if you use a lighter to check gas leaks

Is your refrigerator plugged in? ::DD:

Just go to harbor freight and get a normal air compressor (anything more than 150$ and you'll be all set), you'll definitely be happier.


Also, air contains moisture, and moisture can cause oil...

all liquid? that would be hard to answer, liquid does subcool at 100% quality while staying at the same pressure (for example, like the liquid line of a home ac unit or mechanical subcooler of...

I have no idea what is being accomplished or attempted in this picture

it sounds like a duct size problem, duct that is too small for the required cfm will be noisy. consult an engineer or ductulator

If there is a liquid/vapor mixture you definitely can use a pt chart, though a compressor definitely influences the pressure and temperature of the refrigerant in the system with the dynamic forces...

I've heard about things like magnetic refrigeration (it always sucks to relearn something), flammable hydrocarbon refrigerants, the r22 phaseout and abundance of r22 equipment in the field, one can...

In school i made a small reach in cooler and piped it in With stay brite 8 and when I accidentally overcharged it and it was 600+ psig (i shut it off and it stabilized to 150 And i ran for a recovery...

I would hire an engineer

the pittsburgh pro ratcheting combination wrenches (metric and SAE) have been very good to me and an excellent value for the money, they have gotten me out of countless binds especially where a 5/16...

http://www.famous-cars.net/wp-content/uploads/2010/04/Delorean-Time-Machine-550x340.jpg

Give them an extremely thorough system cleaning that will teach them to use filters ::DD:

r134a was first synthesized not long after r12 (within the same decade), r134a is cheap...and you can get it anywhere. I'm a newbie in the field so I've never worked with r-12, I'll never know what...

It wouldn't let me edit my original post, but the controllers I'm most interested in learning about are

Einstein E2, DDC, PLC, popular proprietary controllers,

or controls in general, how...

Hello forum!

I am a beginner in the field, 9 months in so far... I am learning a lot of things ranging from ac/heat residential and commercial as well as commercial refrigeration. While the...

Probably one of the worst things I've ever seen from the field in the form of a picture, the worst was a heat exchanger "fixed" with some metal and wire

The first thing I was ever taught in refrigeration school was to make my piping as straight as feasible. I love to see people using unistrut hangers for their piping!

Hydrazorb clamps are my favorite thing in the world :D


They're great for both refrigeration and hydronics

A rack for your normal supermarket like Albertsons or Wal-Mart has many capacity steps already built into the compressor control system. Normally it's done based upon what the suction manifold...

Cracked heat exchanger = instant shutdown

It makes me the "bad guy", sure, but I'd rather look "cruel" to the customer than commit criminal negligence

I shut one down today And it had a dollar...

I know that open drive compressors are used for ammonia refrigeration applications, But are there any other advantages or reasons i should choose an open drive compressor?

Just learning a little...

If the refrigerator is r134a you are in luck! Just charge vapor after pulling a good vacuum, r134a doesn't fractionate (it's an azeotrope), and your hoses hold a negligible amount of vapor. Vapor...

This is what i like to call a Friday special hehehe

I saw another one! Chinese restaurant, with an Aaon rooftop unit. High limit bridged out with a piece of wire, condenser fan motor disconnected, random wires everywhere just hanging there.....

This is up to code :whistle:

Reminds me of when I did an equipment list for a new account of ours. They have a big Lennox ac coil/air handler and modine gas reheat setup up in some little cramped room above the main floor. 1...

ugh..wow. RIP OUT AND REPLACE if you can. The venting is wrong too, it looks like a too-small vent goes right into a too-big vent. Idiotic :D

There are only a few things i like more than a clean/organized tidy work area/van. I've seen guys with a van like a tornado hit yet they know where every screw is located, i myself couldn't pull that...

If i weren't mistaken i think you can use a short line set on a Mitsubishi unit with the factory charge, the condenser is large enough to handle the extra refrigerant that would otherwise be in the...

No pictures for this one unfortunately, but a sharing experience for all of us!

I'm a big fan of ductless splits (Mitsubishi is my favorite!) and I want to install a system in my dream home one...

It works trouble-free, for the first month or so.

This is what happens when a hack gets an electrical engineering degree.

I am a fan of using ultra high-heat for my brazing, though shopping for the right tip is difficult and I settled on a uniweld Type 3 number 13 tip with the matching handle and harris regulators (mc...

I would get the machine brand new from a refrigeration/ac supply house if I had the cash available, it saves so much fuss and then you can send in the warranty card (like you'll ever need it for the...

Seems like an awful lot of trouble for tightening a flare, I've always been fine tightening it nice and snug though I do want to follow what the manufacturer says, except for double thickness flares...

I've always used two wrenches to torque the flare connections, whether they're open end or adjustable, though i have a set of flare wrenches made by Armstrong, the bag of 3 double-end wrenches, very...

If you ever find 6" IPS armaflex, cut off a square portion...best butt/knee pillow ever

One time I saw a disconnect installed behind a tree, impossible to open even a crack now. Oh, and the disconnects that are installed over the nameplate of the outdoor condenser, that's my personal...