After trying to replace the filters, clean the condenser, readjust the vents, etc., it appears that there's something wrong with the A/C causing it to not work as well as it did before. It's a 13 SEER Goodman A/C that was installed last year. It has difficulty keeping the house cool during the day (it had no problem last year with similar weather). I did not add anything that produces a lot of heat so it's clear that it's most likely something with the A/C itself. I checked the fans and they are fine. I hear a "liquid flowing" sound by the pipes to the evaporator (indoor) unit that varies in volume periodically. Does that mean the TXV is oscillating?
Is it likely for a problem with the electronics causing the unit to lose performance? Obviously, it's pretty hot this time of year and I wouldn't want to remove the covers unless there's a good chance there's a problem in there (not to mention that I don't like the idea of stripping down in public).
BTW, I already tried to contact my friends Shivani and Tiffany (who are experts in phase change technology) but they are both too busy.
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Originally Posted by A friend of mine who has a Linux kernel named after his girlfriend.
If I was VirtualBox, I could load my virtualization module into Hannah and boot up another kernel in the same address space.
You might need to get it recharged. If you hear liquid flowing, that means that there's air in there and there shouldn't be, so you might need to get that fixed.
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Sounds to me like you have a leak. I would have a pro put a guage on it but I am betting you need to charge the system with some UV dye then find the leak and fix it.
I am just wondering but Is this a R410 or R22 system?
It's R22.
I'll look at all the connections carefully to see if there's a telltale oil stain from the oil in the system. I hope it's not a leak, because it seems expensive to repair. (But at least I'll then have the tools to build the cooling system for my "personal supercomputer". I'll most likely rent the tools as I don't see much need for them in the near future. (And some cheaper ones will be available once phase change for PCs becomes mainstream.) I have worked on a R410a-cooled Britney "server" before so I know how to work with phase change equipment.)
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Originally Posted by A friend of mine who has a Linux kernel named after his girlfriend.
If I was VirtualBox, I could load my virtualization module into Hannah and boot up another kernel in the same address space.
Actually, I hope it's not the coil because it's very difficult to get access to it. Of course, I really hope it's not in some pipe that's hidden in the walls - can you imagine having to take down a wall to fix the A/C?
Now that I think of it, there isn't a liquid line receiver right before the TXV. Does the plumbing itself act as a liquid line receiver?
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Originally Posted by A friend of mine who has a Linux kernel named after his girlfriend.
If I was VirtualBox, I could load my virtualization module into Hannah and boot up another kernel in the same address space.
Im guessing u finished your basment, but the odds of it beinng in the pipe are very skim as long as he used one long piece off copper and didnt weld little bits and pieces its alright. Well the small pipe has liquid and the bigger pipe carries the gas. My dad is in the buisness and knows everything, no matter what problem he can fix it . But hes busy. I suggest u call up the guy who installed it. Must have lost its charge.
The indoor unit is in the attic. As such, the liquid would have to flow up, so I'm thinking that gravity causes the liquid to lose some pressure and become a mixture of liquid and gas (no sight glass so I can't really tell). If there is a liquid line receiver, it would separate the liquid from the gas and allow the gas to cool down further and condense.
A friend just told me that the TXV sensing bulb could have slipped out of position, causing the TXV to not operate properly.
Quote:
If you hear liquid flowing, that means that there's air in there and there shouldn't be, so you might need to get that fixed.
I don't think a liquid sound always means air in the system. I know that the Britney "supercomputer" I worked on makes that sound when in operation. My heat pump-based clothes dryer also makes that sound while in operation. Likewise, the A/C made that sound while in operation from day 1, although it was fairly constant at that point. Now the noise varies in volume periodically, leading me to believe the TXV is oscillating.
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Originally Posted by A friend of mine who has a Linux kernel named after his girlfriend.
If I was VirtualBox, I could load my virtualization module into Hannah and boot up another kernel in the same address space.
OK this is how u know if ur ac is working put ur hand on the larger pipe connected to the air condition if it is sweating and its cold your good, if it isnt, well u lost some refrigerent, and if so, do a bubble test. get soapy water and pour it on the welds, if it bubbles there a leak, if not then its either somewhere in the line or the coil most likely. It might also be freezing the pipes so make sure it is sweating. If the refrigereant freezes that another reason why.
You should try changing your Marky-Mark headers and recharge the Enrique Iglesias. That should help.
Incidentally, try monitoring your indoors humidity; if the evaporator exchanger unit frosts over, that will act as an insulator and greatly reduce efficiency. Try defrosting your unit. This may get unpleasant as temperatures rise.
Also, your unit may simply be incapable of removing heat at the current pace. Where does the heat expel to? You said your unit is in the attic; I hope it's not pumping heat into your attic!
I still think you have a leak. Most units have at least a 1 year parts and labor warranty. You said the unit was installed last year. When last year?
I like Trane units myself plus if you pay a little extra there is even an option for a 10 year parts and labor warranty. Would be totally covered under cases such as this.
I think this year is much hotter and higher humidity than last year so your a/c unit is working harder. Also depending on the system you have you can only get a 25-30 degree difference from the outside temperature meaning if your unit is sitting in 110 degree heat it can only bring your house down to 80 degrees and the heat index counts for your a/c unit as well as yourself.
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