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You need a class in the local community collage; more physics than refrigeration, may get the answer you are looking for in class, try to find a psychometric chart, most available at college, if you...

I was looking for a new job decades ago. I went out with their best tech who condemned most every furnace he saw. When we got back to the shop he showed me a room with tiny cubicles with a phone and...

If you can't understand the answer, don't ask the question.

not to mention the lack of service for your water heater or boiler When the damper is stuck closed.

If you dont know , you should not be playing with deadly things.

If your compressors are failing it's a far more problem than a possible slight mismatch.. your system is full of acid; you need to either clean it out, or rip it out entirely

Kids!!! they dont know that one cant braze a connection without a proper purge and a way to let pressure out.

It's been done, guy's about the age of your pic!

if your unit has been working well for 19 years, it is probably just fine. My a/c system was working fine after 33 years.

I was on a job at a large church were my cousin was sent to fix a leak. He fed enough 95/5 to seal off a 5/8"od line

over heat the ever living shigt out of it

Oversized is not better, it's just bigger. You want a unit that is sized well so that it runs 90% to remove humidity.

I never recommended mixing the two solutions. i love your humor but dont be silly.
Vinegar has a PH level of 2
Bleach has a PH level of 13
Water has a PH level of 7 out of 14
My fellow colleges,...

Well it seems that we have gotten to the root of the problem. As your tech said try to avoid putting in a condensate pump by all means. They cost a lot of money, they are cheaply built and known to...

First I would like to apologize for recommending bleach while you are so apposed to it. I've no personal experience from bleach ever causing a problem. Since bleach is corrosive and vinegar is...

I would pour bleach in it, let it sit, dont flush it out, spend days or weeks until it comes out clean; after that you can probably neglect it for a decade but better to keep it clean.

I was just beginning to think that he had an A-coil box sitting right on the slab with no hope of running a condensate line like we do in Chicago where the drain line is four feet above finished...

Dear Masscom; while your condensate line makes absolutely no sense it still may be true. I just cant see why, the original installer is punching holes thru the wall for refrigerant lines, what's one...

The $ dont make any difference to me, im not paying the bill, but i do have to listen to the complaints. the design reason is to be cheap; when one opens a switch ,disconnect, breaker, ect... the...

apparently i am very old school, if you are going to manufacture a contactor for a single phase 240VAC why save 50 cents to only open up one hot leg? does it work to open the circuit, of coarse it...

Well certainly replace the I.E. condenser fan cap but if I need to replace the compressor cap too it costs more $. Now if the capacitor goes bad it's likely to lunch two motors, not just one which...

I cant imagine a plumber roughing in a condensate line under the slab, but then again i'm a pipefitter. It would make a mega trap with no good results.
Unless i missed it , the question remains...

suction line too small
txv bulb mounted poorly
not enough load
improper fan speed
Here in TX I have 105* outdoor, 86* indoor. A 20* delta T, pretty good since im undersized. Make sure the...

sorry for bad descriptions, when i said "fixed" TXV i meant non-adjustible TXV, Stumpy

It's my opinion that fixed TXV exist for manufactures to use a cheap part and to have control over YOUR system; i.e. limited liquid flow and high superheat. When I retrofit any system i use an...

You need to chase and annoy the crap out of the installer. If they tied into an old condensate drain they should have made sure that the pipe was "as new". You paid for a properly working drain, the...

If it was me i would go back to the install manual and check CFM charts and line size charts, there are a lot of variables on a split system.

Nominally you should be in the neighborhood of 120#/40*F lowside, I cant find a chart so i'm reading off my analog gauges. High side looks right but it will change. If you are buying your own txv...

You should apply for professional membership, it does not cost anything. We work on: centrifugal, screw machines, recips, scrolls,; industrial chillers, commercial equipment, grocery store racks,...

i do my own A/C work on my Chevy trucks, pretty easy. I overcharged the ever living crap on my brothers import car. It's all the same while remaining different.

without having all of the facts my...

we need a lot more info: indoor and outdoor temps; what was replaced? condensing unit, copper line set, indoor unit; adjustable TXV or fixed; line size; location of indoor and outdoor units as to...

low air flow
dirty filter
dirty coil
TXV not adjusted correctly

Totally agreed with you, This is perhaps the biggest reason that I do not like dual capacitors. It must save the manufacturer a nickel, but it costs more in the field. One should always replace the...

LOL, you're the greatest

Because we are having fun! Many people have been killed or maimed while servicing disconnected equipment and television sets. Capacitors hold a lot of electric potential at high voltages.

look for any papers that were left with the appliance. You should have the user's manual and possibly the installation guide. A drain pan overflowing is a bad sign, especially on a new unit. You...

Try not to do anything stupid, like kill yourself. (Lt. Dan)

I did most of my work in the Chicago area where it is also humid. Yes gunk, algae, and even legionnaires disease can grow in stagnant water. Typically the A/C coil has a pan meant/designed to drain....

Back in the early 1980's I had an old R-12 tank i used to fill up with air for car tires. No way i would use it for 410A, P.S. no relief valve on those tanks!

There is absolutely no reason that any refrigeration system should be running at more than 10* SH. What is the point besides inefficiency, you have a roof top unit operating in 130* environment...

You are speaking of reheating in the case of dehumidifacation only during tepid temperatures. The only way to remove moisture from the air (in our industry) is to get a cold coil and condense the...

Here's some notes from the 1980's: I worked at a large petrochemical facility who had a multi-million contract with the second largest HVAC manufacture company in the U.S. By chance this equipment...

It's fairly obvious from all of the photos that a copper 90* ell was brazed into the pipe line during installation. Brazing does make the pipe more malleable, so if some idiot did step on it, it's...

What? an: ancient, rusty, untested cylinder filled with refrigerant at 150% to 200% of design bothers you? Sounds like natural selection to me.

I got an almost new Carrier 2 ton unit for my house that was a new install and wouldn't cool enough. I found out that the condensor fan would run backwards some times. Someone at the factory put the...

we will assume the unfused side of the transformer took a dump. poor terminal connections do raise heat and amperage, think of starting your truck in the cold with a half dead battery; the soleniod...

I love the quality and diversity of our members from the standard, all the way to the obscure stuff.

Heat pump water heater is way beyond my location, a tankless water heater is a good choice.

" thinking maybe of a system larger than a mini-split, motor is burned out by acid, huge system... you cannot replace everything, so what we do is change the oil every day until acid tests come...

I'm not sure if I understand your question , or could explain it. Honestly I have no idea of what a mini split is unless it is a wallhanger evaporative unit. I have installed those. Thinking maybe