Question about Whirlwind FH-778 Air Conditioner

3 Answers

Leak on home A/C

My home AC was low on freon. I had a cert. tech charge the system back up to where it should be, but he never checked for leaks. 4 weeks later, same problem. I used soapy water to locate the leak myself, which is on a copper pipe just outside the condensor coils. My question is, is it ok to solder up the leak without removing the freon from the system, or would this be dangerous?

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  • lvcta Jun 17, 2008

    Thanks burzerko. I'll let the pro's tackle it!

  • ejreddix Jun 20, 2008

    I had a/c tech recharge my system to 75 psi and two weeks later it's at 52 psi and he said that he was not able to locate any oil stain? I'm afraid that I will be back at "0" in two more weeks. How do the soap and water work? When do you apply this solution?

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You need to have the system evacuated to fix this leak. First thing is for safty reasons, for your protection and refrigerant release. second is to make sure no contaminates are released inside your system. The tech should recover the refrigerant fix the leak, then purge with nitrogen, then pull a deep vaccum to 500 microns and it should hold for 20 mins. then he should recharge the system with refrigerant.

Hope this helps

Posted on Jun 17, 2008

  • burzerko
    burzerko Jun 20, 2008

    ejreddix



    The soap solution works by adding 1tsb to 1 quart of water then mix it well in a spray bottle spray all areas and watch for bubbles to appear. Sometimes this will give you a false reading though if the air moving arond is strong enough to create the solution to sud.

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1. use stop leak,(New heavy-duty stopleak product XL-4 ) because it is very difficult to find where is leaking.

2. connect to the low pressure fitting of the condenser and use the A/C gage meter to add ES-22a or R-22 until reach to 75 to 85 psi if the temperature is around 90 degree.

3. turn on the A/C and re-charge ES-22a or R-22.

4.If you do not know how to do it,hire a professional A/C man to do it.

Posted on Jun 22, 2008

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Posted on Jun 18, 2008

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1 Answer

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Below is a guide to troubleshoot and check system function. This can be done by most folks.

Look at the front of the ac compressor and have someone turn on the ac from inside the car. The front of the pulley(clutch) will spin when turned on.

If it does not spin, the low pressure switch (LPS) is not satisfied. Meaning there is not enough freon in the system to operate the system. Means low freon capicity because of a leak.

The LPS can be jumpered to cause the compressor to run (clutch to engaged) which will draw the freon in the system.

The LPS is usually a two wire sensor on the suction of the compressor. (between evaporator and compressor) Unplug the sensor and install a jumper, this will engage the clutch. Connect a new can of freon
and fill to system capacity.

The capacity of the ac system will be on a label under the hood, do not overfill. Probably about 2 lbs. Local parts stores (Auto Zone and Advance) will have freon with stop leak. This may help the leak. They also make a freon with a UV dye. I always add a single can with dye so that if stop leak does not work I can find the leak in the future.

The system should be filled until suction pressure is about 30 to 38 psi..

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2. From the condenser a HP2_bing.gif liquid goes to an expansion device (orifice tube or expansion valve)
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1 Answer

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Ok if you want to do a home repair in hopes of saving yourself a lot of money and with hopes your system is not in major trouble, here goes:
First step buy 3 types of 1 lb. cans of refrigerant R134a at a parts store, 1 can of leak detector freon combination, and if possible 1 can freon/air conditioning oil combination freon along with 1 can of straight r134a freon.
The store will sell you a charge hose with a cheap type of charge gauge attachment and fittings to attach to your system for the re-charge.
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