Air conditioner help

NHbalerman · May 9, 2020

Checking the AC on the 1283 baler and the low side was nearly all the way vacum and the high side was about 100 does that sound like the compressor or the expansion valve I'm not sure but wanted to get some advice before throwing parts at it. Thanks

Olliejunkie · May 9, 2020

Maybe this will help.

MARK ROBKE · May 9, 2020

Sounds like blocked expansion valve to me. How fast do the pressures equalize when you shut it off? If real slow, it's the expansion valve. Also always replace the drier too. Mark.

jimg.allentown · May 9, 2020

Sounds to me like you are low on charge. High side should run from about 150 to 200 on an average warm day in the mid 70s. Low side should stay around 20 to 30. Running vacuum on the low side indicates low on charge.

Symptoms of a blocked expansion valve would be the high side too high and the low side too low and the evaporator temperature near to ambient. If the expansion valve is not working to meter the refrigerant, low side will be high and high side will be too low. A sticky expansion valve will act erratically. it will allow normal function some of the time and no cooling at other times.

Also note that R-134a really wants barrier hoses, and will leak through R-12 hoses gradually.

David G · May 9, 2020

way low, low side should be in 30s.

Steve@Advance · May 9, 2020

Low refrigerant.

If it's r134 be very careful not to overcharge.

NHbalerman · May 9, 2020

Thanks for the info I just went out and checked it by releasing some pressure off the high side and some Freon came out but I will put some more in it and if that don't work try replacing expansion valve and drier

Case Nutty 1660 · May 10, 2020

I assume this is with the system running/compressor running,, that reading tells me you have a partly restricted receiver drier,, if you can add freon and get it to 130-150 psi on the high side and 10-30 psi on the low side and it cools fine I would run it,, if it still wants to be in the vac to 10 psi range with high side up to 150 (the reading change with out door temps) and is not cooling like normal I would change the drier out,, I also suggest you vac out the system for at least 20 min before charging again after the drier is replaced to remove all air and any moisture in the system,, if you find a high amount of oil int he lines when you are draining the system let it come out and drip from the lines for a 1/2 hour or so,, this condition is not out of the norm if the drier is plugged,,
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Air conditioner help

NHbalerman

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Olliejunkie

Well-known Member

MARK ROBKE

Well-known Member

jimg.allentown

Well-known Member

David G

Well-known Member

Steve@Advance

Well-known Member

NHbalerman

Member

Case Nutty 1660

Well-known Member

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