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I do the same except that I generally just read uf from my meter.

How does flowing nitro into the LL service port and out of the vapor service port pass nitro though a compressor or all pipes of a reversing valve?

How does flowing nitro into the LL service port and out of the vapor service port pass nitro though a compressor or all pipes of a reversing valve?

Its is pretty straight forward to flow nitrogen while brazing in a new install/change out. How do you get nitrogen to flow though the compressor when replacing it or a reversing valve for that...

You have already found this place, so you are off to a good start.

Search Dalton's Law.

That hits the nail right on the head. I couldn't agree more.

I have used super seal a few times with about 50/50 results on slowing/stopping the leak. No compressor failures. I have not used it in years.

First off thank you for sharing your knowledge and experience. I am not looking for anyone to teach me a CO and Combustion Analysis course over this forum. As I mentioned earlier in this thread, I...

Could anything other then a crack cause O2 to rise, or would that be a plosive indication of a leaking crack?

What readings on the CA would indicate a cracked heat exchanger? Of course my question is assuming that a significant crack can always be found with a CA if one knows how to interpret the readings. ...

I would have expected a setup like that to be much more expensive. Very few if any resi techs in my neck of the woods have combustion analyzers. I plan on getting one before next heating season...

That is technically correct, but it is not practical to recover and re-weight in a charge in all cases. This is especially true when the need is to just ck a charge. Mfg charging charts are not...

I have a Fieldpiece SLR2K7 that works well on R410a. It does not work as well on R-22 as my Inficon Tek Mate, but the Tek Mate is near useless on R410a.

Is it easy to calibrate the pipe clamps temp reading on the AK900? Does it hold a temp setting well. I find that my fieldpiece SC 77 does not hold a pipe clamp calibration for long, and that is...

I installed one in my ex g/f's house. It's a nice T-stat but, I agree with ADillion that it will be too much for some customer's.

That would work with an air handle that had the coil down stream of the blower. It would not work on a gas furnace with the coil on top.

The same goes for any other brand

http://www.ebay.com/itm/HEATPUMP-CONDENSER-TRANE-13-SEER-R410A-2-5-TON-4TWB3030A1000A-NEW-/221197019749?pt=Air_Conditioner&hash=item33805eaa65

I have had one of those for about 7 years now. It works great on R-22 but it sucks at picking up R 410a leaks. I have a Fieldpiece SL2R that works well for R-410a but not as good as the tek mate for...

Agreed but most customers in our market would not pay for the cost involved. Your market may be different?

I did that on a Trane HP that had had several compressor failures and no suction dryers were installed. Have not been back since.

We almost never install a suction line dryer but, we always replace/install a LLFD. We have had good results. I'm not arguing in favor of this policy. I'm just say'n that's what we do and, we...

The type of defrost control is not a factor at all in SEER. HSPF does not account for strip heat use in defrost and assumes that there will be no defrost below 17 degrees. Demand defrost has has...

My experience has been different. I have replaced many bad compressor run caps on condensers that had OEM start kits that were good.

The conditions that cause the coil to frost up the fastest, requiring the shortest defrost interval, are misty rain/very hi humidity with outdoor dry bulb temps in the thirties. Any time that the...