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Solder will not stick to copper tubing - Air Conditioners

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Make sure you are using flux and that the copper is cleaned to a bright new apperance. Also make sure that you are using at least a 5% silver flow solder.

Posted on Aug 30, 2008

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How to close very thin copper pipe line?


Your question is a bit short on details
there are plugs available on the market that allows you to blank of an open line so that it can be reused
they will be available from shops that sells hoses and tube fittings
If you just want to blank it off permanently then squash the end with pliers and then fold it back over itself
then use a soldering iron and solder the squashed end so that it will not leak

May 12, 2015 | Air Conditioners

1 Answer

I need a parts manual for the Frigidaire Air Conditioner, Model FRA186MT2, 18500 BTU. The copper tubing need to be replaced due to holes with allow the freon to escape.


Copper tubing can be repaired, unless it is in the coils on the unit, in which then the coil would need replacing, there is no parts manual that can be obtained online, you must go to your local A/C Supply House to access one. If you write back with a better description of your leaks location I could assist you in giving you a better parts list. Anything on the copper lines must be soldered and will require materials needed to do so also, evacuation equipment such as refrigerant guages, vacuum pump, and a recovery machine will be needed. Also the proper refrigerant which cannot be obtained with out a license (Most likely R-22) will also be needed. If you cannot obtain these items, calling your local appliance repair man would probaly be in your best interest.

Jul 27, 2011 | Air Conditioners

1 Answer

Old copper with paint, cleaned end, fluxed it, tried to tin it and solder will not stick. Tried three times. I was using my plumbers torch so I don't think heat was a problem. I have only run across this...


Are you trying to solder on a closed piping system? If so one thing that will cause many problems is any moisture in line. It does not take but a drop or so to vaporize to steam and cause oxidation on pipe or fitting which will cause solder not to stick.If you are working on closed piping try to find valve or faucet somewhere to vent steam. I would clean again and make sure you are using good flux and right solder & try again. Hope this helps. Thanks

Nov 09, 2010 | Air Conditioners

1 Answer

I bought a 1200 serious heat cool window unit.. I noticed when we removed it from te casing, that one of the copper tubes, a small two inch extention on the top was bent and crimped. This piece was a small...


Hi,
Yes, that is the tube that was used to charge the unit...after the charging process the tube is often bent over, crimped and then soldered shut... that is perfectly normal and you should be okay...

heatman101

Apr 17, 2010 | LG Heat cool Window Air Conditioner

1 Answer

Need drain tube


Measure the outside diameter of the vinyl tubing and then go to the hardware store and purchase a foot or two of soft copper tubing of an inside diameter that will just slide over the vinyl tubing and extend it for you. To attach the copper tube to the window sash you can use some crazy glue that is designed for both metal and what ever substance your sash is made from [usually either wood or stone].

Aug 14, 2009 | Frigidaire FAA085P7A Wall/Window Air...

2 Answers

HOW TO RECHARGE SPLIT TYPE AIR CONDITIONER WITH USING r22


check cooling coil(in door unit)if there ice buil up then feel air vent if no air mean your fin block aready need to clean / air vent ok meant there have a leak .you need r22 test gauge and hose,reamer,tube cutter and flaring kit. 1)check suction pressure(big tube at out door unit) remove 2 way cap and 3 way cap valve then connect blue hose at service port 3 way valve (port locate at left or right depent on manufacturer) you will get pressure about 40-45 psi(air cond is running) then use a allen key(hexagonal wrench) to close 2 way valve(small tube or gas discharge side) wait 1-2 minute then close 3 way valve (suction tube or big tube) IMMEDIATELY SHUT OFF AIRCOND AND PLUG OUT POWER CORD (you need 2 person one at in door unit and the other at out door unit). this method is to keep remaining gas inside the compresser.Then leak check ,open 2 way valve about 90 degree hold it for 10 minute then close it .MEASURE THE PRESSURE keeep it for 5-10 minute. If the pressure indicate not same during the first time measured it meant there have a leakage, for air cond 1- 5 year the leakage will happen at the copper tubing connection and improper flaring .Then U need to clean in door and out door unit ,used a spanner or wrench to losen the copper FLARE NUT at out door unit and in door unit( inside insulation) then use pvc tape to cover all copper pipe/tube hole to prevent dirt go inside tube/pipe. Then lift up out door unit and used coil cleanner ditergent wait 5 minute then flush with water. Remove indoor front panel then disconnect out door unit cable at front panel in door unit then lift up indoor unit to disangage the hook and pull out the indoor unit, then clean the cooling coil ,cover electrical part with plastic .last step u need to cut (used cooper cutter)the copper pipe/tube FLARE NUT connection low side(big tube) and high side(small tube) in door connection and out door connection .Then u need to remove the burr from cut edge using reamer make sure metal powder not goes in Then make a flare after inserting FLARE NUT onto the copper pipes Then U can install back the unit check the low side pressure if the pressure 55-67 psi no need to charge

Jul 03, 2009 | Air Conditioners

1 Answer

My Gas pilot light will not stay lit. If I take my hand off the ignition swithch it goes out. I have had the theromostat replaced but, the same thing happens.


You probably have a bad thermocouple/pilot generator. This is a tube that is in the pilot flame when the pilot is lit. If the gas valve doesn't get a good reading from it, the gas valve won't allow ant flow. They are easy to replace, a thermocouple has a copper tube that inserts into the body of the gas valve, a pilot generator has two wire leads. The gas MUST be turned off while you change it out. If it's a tube type (thermocouple), be careful not to kink the copper tube during installation.

Aug 26, 2008 | Air Conditioners

1 Answer

Window air conditioner


You could get the valves from a scrapyard either out of a car or old refrigerator to solder in and refrigerant gas recharge cylinders from eBay.

Alternatively you could solder in a thin copper tube to refill the AirCon then crimp it before cutting and soldering it to make a perfect seal. This is how the manufacturers do it.

Jul 09, 2008 | Air Conditioners

1 Answer

Central Air not cooling properly


This tubbing carries the refrigerant. The small line is flowing to their inside air handler. If the line is hot it is an indication that the outside unit is not able to release the heat. The most common reason is that the coil (looks like a car radiator) is dirty or plugged. This can be cleaned with a brush or sometimes a garden hose. They do make acid type cleaners for doing this, but the use of the acids are restricted in some areas.

By the way the other black pipe should have a larger copper line behind the black insulation. That line should be cold and sweaty like a nice glass of ice tea:)

Jun 26, 2008 | Carrier 36KCARMS Air Conditioner

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