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Originally Posted by itsiceman

Just like a micron gauges the mfgs. feel the need to include these things even if they arn't very good..
I dislike the SMAN clamps and have seen videos showing the similar reasons to not believe in their accuracy in the field. The best way to mount a sensor is to strap it to the line and insulate. Most clamps do a poor job in the field IMO.

accuracy check is simple for any temperature probe. put a piece of ice on the probe. ice is 32 degrees. simple test.

Originally Posted by ga-hvac-tech

While I am a DC fan (never tried a Testo digital gauge set)... I do own some other Testo products: 327 combustion analyzer, 410, 510, 610, and a few others... they are all designed with thought and all work well.

I would not rule out Testo just because their digital manifold does not work right...

I have a 557 And sent it in. My bad. I did not fully rely on the manual. But the kind folks thru Mr. John Bickers gave me a free calibration check and firware up date.

No body can convince Testo ans FP gauges are not worth the investment. And if you have trouble with customer service...just a suggestion..."Youu catch more flies with honey than vinegar".

Originally Posted by NY2GA01

They are inaccurate, and have lots of issues.

I have sent my 557s back twice in less than a year to be reset (?) adjusted (?) calibrated (?), (I am not sure because testo never tells me what they did). All I know is I am sure there will be a third time.

When on R 22,it seems to think the pressures are 450 on the high side, 180 on low.

Yes I have it set to r 22, yes I blow it each and every time I change refrigerant, which was only once.


Its been the worst tool I ever bought, and I am not impressed with testo's customer service. I don't think I am ever going to buy testo anything ever again.

While I am a DC fan (never tried a Testo digital gauge set)... I do own some other Testo products: 327 combustion analyzer, 410, 510, 610, and a few others... they are all designed with thought and all work well.

I would not rule out Testo just because their digital manifold does not work right...

Originally Posted by jpsmith1cm

That little widget is a tire pressure gauge.

I tried it today, hope the gauges are easier to use because I couldn't get it to read pressure. I tried while pressing the tire button and not pressing the button, not sure what happen.

Originally Posted by jim bergmann

Just wondering what don't you like about the 557? We sell a lot of them and have very few if any complaints.

They are inaccurate, and have lots of issues.

I have sent my 557s back twice in less than a year to be reset (?) adjusted (?) calibrated (?), (I am not sure because testo never tells me what they did). All I know is I am sure there will be a third time.

When on R 22,it seems to think the pressures are 450 on the high side, 180 on low.

Yes I have it set to r 22, yes I blow it each and every time I change refrigerant, which was only once.


Its been the worst tool I ever bought, and I am not impressed with testo's customer service. I don't think I am ever going to buy testo anything ever again.

Originally Posted by itsiceman

Did you get the latest temp sensor wiring?
The one I saw looked like I was looking at a set of red and blue 10gauge THHT wires Do yourself a favor and rip the velcro off and just use a reusable zip tie to mount them

Millie-ties are GREAT!

Get 'em at radio shack

Originally Posted by Joehvac25

The whole kitAttachment 358891

That little widget is a tire pressure gauge.

Now if I were running TTT... I would NOT support any one manufacturer over another... just not good business... REGARDLESS of the facts...

Understand???

Originally Posted by chuckcrj

He just feels obligated to carry on his uncle's crusade against DC.

Fellow forum members: Uncle and I are supplied by TTT whose customer service is unmatched.

If Mr. Bergmann makes the statement that DC is superior to a 570, I will buy a DC from TTT.

In return I want this DC issue to die right here. Agreed?

Originally Posted by jim bergmann

Not bad to upper Michigan. They are a good product. If it your first set you will wonder how you ever lived without them.

Looking forward to some warm weather now!

Originally Posted by itsiceman

The door opener is a tire pressure gauge

Nice the picture of the tire on it makes sense now lol, I was thinking the velcro might be a pain, it took me 5 min to unravel one, it has memory or something lol.

The door opener is a tire pressure gauge

Sorry I see you posted the pic. Yep those are the ones

Originally Posted by Joehvac25

Well it ain't a set of testomans but it will work.Attachment 358651

Did you get the latest temp sensor wiring?
The one I saw looked like I was looking at a set of red and blue 10gauge THHT wires Do yourself a favor and rip the velcro off and just use a reusable zip tie to mount them

Problem with analog gauges is they can be as much as 25# off... right out of the box... NEW.

If that level of accuracy is not important... then analog gauges are fine.

Not bad to upper Michigan. They are a good product. If it your first set you will wonder how you ever lived without them.

Thanks for the fast delivery Jim lol, took 2 days only!

Originally Posted by NY2GA01

I have the testo 557 and would never spend that much money on gauges again.

I don't like them so much that I am putting them on craigs list. I just bought the fieldpiece ST4, Dual-Temperature Meter, and will use a normal set of gauges.

Just wondering what don't you like about the 557? We sell a lot of them and have very few if any complaints.

I have the testo 557 and would never spend that much money on gauges again.

I don't like them so much that I am putting them on craigs list. I just bought the fieldpiece ST4, Dual-Temperature Meter, and will use a normal set of gauges.

The whole kitAttachment 358891