Bad A/C reversing valve?

Thanks for all the info, I'll gather whatever info I can as I've had different diagnoses, false fixes, and opinions from 5 techs now. All of the return filters and vents I have replaced and seem ok. Here's the latest:

-I spoke with the owner of the company that installed and has been servicing the unit. He says one of his techs felt the TXV valve was bad but they worked with Bryant over the phone who said the reversing valve was bad based on the data given. He said it would be close to $1000 to replace both and I should call Bryant and bitch to see what they'd do since the unit is only 14 months old.

-I called a new hvac company for a 2nd opininon. They sent a tech out. He measured the refrigerant psi for the lines attached to the condenser. He noted the pressure was climbing from 200 to almost 400 psi, at which point the release valve kicked in and it would soon start all over again. He had eventually gotten the pressure stable and said he believed there was contamination in the line and the issue was now fixed (although I found no change later on). This is the info he gave me on what he did:

-found system overcharged

-found system heat pressure raising to 450psi from 210

-pumped system down, inspected piston at liquid line at condenser & screen at condenser. Found a small chunk of possibly brazing rod

-flushed nitrogen through lineset to make sure there was good flow

-pulled system into deep vacuum

-recovered some of refrigerant to proper charge

-system working properly

-suction & liquid pressure steady

- 10 degree superheat LO 80

-12 degree subcooling Hi 200

-18 degree delta T - compressor amps 10.1

I called the company back and they sent out another guy. He energized/ de-energized the reversing valve using heat and cooling but it did not help. He had been looking at the air handler and says there's no filter drier installed and now the system needs to be cleaned out, txv replaced, filter drier installed and we mostly likely don't have a filter drier on our other system (although that one's been functioning ok). I looked at the documentation for this unit and the filter drier is listed under optional equipment but another page says it is suggested in all field-connected split-system heat pumps. Can the absence of this filter really cause the issue? If so, is this a major mis-step of the installers to not put it in?

Reply to
dpontrelli
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Many condensing units have a small factory installed liquid line dryer inside the housing. On any of the systems me and my guys install or disconnect for repair, we in install a replaceable liquid line dryer and sight glass with a moisture indicator. Using flare fittings and sealer called Leak Lock makes it easy to replace the dryer or attach fittings for blowing out the lines or pressure testing. Another product I often use on sticky valves is Supco88, it's like Liquid Wrench for refrigeration and AC units.

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Injecting Supco88 into your system could help free up the reversing valve, expansion valve or clear a clogged port if that what is causing the problem.

[8~{} Uncle Monster
Reply to
Uncle Monster

wrote in news:17c5b$46dc4925$9440c41e$10980 @STARBAND.NET:

Only to you...

Reply to
Clark

And anyone with a brain...

Reply to
<kjpro

wrote in news:62a75$46dcc3e7$9440c41e$23205 @STARBAND.NET:

Anyone with a brain see that you are by nature an abusive and antagonistic personality with an obsessive-compulsive disorder. GOOD LUCK.

Reply to
Clark

Your broken record "inaccurate bullshit" crap makes no sense whatsoever. I&#39;ll give you due credit though for being the pedantic fucktard you are. Regardless of the thousands of your ilk that exist on Usenet, I think you deserve a little recognition.

Reply to
Meat Plow

Are you still looking for a treat?

Reply to
<kjpro

It means that your brother posts shit that&#39;s not correct. Like that better?

Reply to
<kjpro

On Mon, 03 Sep 2007 23:40:07 -0500, kjblows puked:

It means that you are the one and only with that opinion (prove otherwise.)

Call it sadistic but I love watching you squirm.

Reply to
Meat Plow

The tech "felt" the TXV was bad? That&#39;s a sure sign of a hack. And without the data Bryant&#39;s telephone diagnosis isn&#39;t any better.

Yep, your system was hacked.

How do these numbers compare to the specs for this system?

That&#39;s because the reversing valve isn&#39;t the problem.

With an 18 degree delta T I&#39;d say the TXV is working OK.

As we know, the original installer is a hack. However, the absence of a filter dryer in a properly designed and installed split system isn&#39;t fatal in and of itself.

Did you ever get a look at the heat load calculation that the installing company did? Oh yes, that&#39;s right... they are a hack. How about the return and supply plenum temperatures? You still might have a return-side duct leak.

The most recent tech seemed to have the most scientific approach to diagnosis; maybe his company can do a heat load calculation for you and tell you if your system is correctly designed.

Reply to
Travis Jordan

otherwise.)

You didn&#39;t see where Zpr posted facts regarding the sweating LL?????

Believe what you want, you and your brother know jack shit about HVAC.

Next time, I suggest that you take some classes and don&#39;t rely on alt.home.repair for your training/facts.

Reply to
<kjpro

wrote in news:74b70$46dce158$9440c41e$10736 @STARBAND.NET:

$30781

antagonistic

Are you still drunk? Dance boi, dance.

Reply to
Clark

wrote in news:74b17$46e16d21$9440c41e$23671 @STARBAND.NET:

Not one single lie you incompentent drunken fool. You can&#39;t refute a single one of my statements and you know it.

Reply to
Clark

wrote in news:49ffb$46e20195$9440c41e$13024 @STARBAND.NET:

I know you are but what am I?

Neener, neener, neener! Can&#39;t just ignore me can you? Neener, neener, neener! Kj&#39;s a clueless retard, kj&#39;s a clueless retard! Neener, neener, neener!

I post, you dance. Don&#39;t you ever get tired of being the usenet equivalent of a marionette? Just keep dancing drunken monkey boi.

Reply to
Clark

You&#39;re just as f****ng obsessed as kjp.

Reply to
Meat Plow

Meat Plow wrote in news: snipped-for-privacy@news.alt.net:

Naw, I&#39;m just playing with kj &#39;cause he&#39;s such an easy target.

Reply to
Clark

wrote in news:894e2$46ec9aaf$9440c41e$12750 @STARBAND.NET:

Score!

Reply to
Clark

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